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    <link:label id="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_527D459457ED7088DA81A21F936F70B7_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_527D459457ED7088DA81A21F936F70B7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amount still available for additional borrowings</link:label>
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    <link:label id="lab_iff_AmountOfAvailableLinesOfCredit_FC649ED2C91742EC7C3CA21F936FFABB_terseLabel_en-US" xlink:label="lab_iff_AmountOfAvailableLinesOfCredit_FC649ED2C91742EC7C3CA21F936FFABB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available lines of credit</link:label>
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    <link:label id="lab_iff_TwoThousandTenPlanMember_D450BBA1510D6EF71295A21E98902A41_terseLabel_en-US" xlink:label="lab_iff_TwoThousandTenPlanMember_D450BBA1510D6EF71295A21E98902A41" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2010 Plan [Member]</link:label>
    <link:label id="lab_iff_TwoThousandTenPlanMember_D450BBA1510D6EF71295A21E98902A41_label_en-US" xlink:label="lab_iff_TwoThousandTenPlanMember_D450BBA1510D6EF71295A21E98902A41" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Two Thousand Ten Plan [Member]</link:label>
    <link:label id="lab_iff_TwoThousandTenPlanMember_D450BBA1510D6EF71295A21E98902A41_documentation_en-US" xlink:label="lab_iff_TwoThousandTenPlanMember_D450BBA1510D6EF71295A21E98902A41" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">2010 Plan [Member]</link:label>
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    <link:label id="lab_iff_LongTermIncentivePlanMember_5CC335E94481523D7810A21E9890B58C_documentation_en-US" xlink:label="lab_iff_LongTermIncentivePlanMember_5CC335E94481523D7810A21E9890B58C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Long-term incentive plan [Member]</link:label>
    <link:loc xlink:href="iff-20191231.xsd#iff_LongTermIncentivePlanMember" xlink:label="loc_iff_LongTermIncentivePlanMember_5CC335E94481523D7810A21E9890B58C" xlink:type="locator" />
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    <link:label id="lab_iff_TwoThousandEightToTwoThousandTenCycleMember_FAC028404AA6A98675E7A21E98902042_terseLabel_en-US" xlink:label="lab_iff_TwoThousandEightToTwoThousandTenCycleMember_FAC028404AA6A98675E7A21E98902042" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2008-2010 Cycle (Cycle VIII) [Member]</link:label>
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    <link:label id="lab_iff_TwoThousandEightToTwoThousandTenCycleMember_FAC028404AA6A98675E7A21E98902042_documentation_en-US" xlink:label="lab_iff_TwoThousandEightToTwoThousandTenCycleMember_FAC028404AA6A98675E7A21E98902042" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Two Thousand Eight To Two Thousand Ten Cycle [Member]</link:label>
    <link:loc xlink:href="iff-20191231.xsd#iff_TwoThousandEightToTwoThousandTenCycleMember" xlink:label="loc_iff_TwoThousandEightToTwoThousandTenCycleMember_FAC028404AA6A98675E7A21E98902042" xlink:type="locator" />
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    <link:label id="lab_iff_TwoThousandTenToTwoThousandTwelveCycleMember_FCCB6B7B512A15CBE5D3A21E9891A861_documentation_en-US" xlink:label="lab_iff_TwoThousandTenToTwoThousandTwelveCycleMember_FCCB6B7B512A15CBE5D3A21E9891A861" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Two Thousand Ten To Two Thousand Twelve Cycle [Member]</link:label>
    <link:loc xlink:href="iff-20191231.xsd#iff_TwoThousandTenToTwoThousandTwelveCycleMember" xlink:label="loc_iff_TwoThousandTenToTwoThousandTwelveCycleMember_FCCB6B7B512A15CBE5D3A21E9891A861" xlink:type="locator" />
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    <link:label id="lab_iff_TwoThousandFourteenToTwoThousandSixteenCycleMember_338D091600E194A0447AA21E98911EB3_terseLabel_en-US" xlink:label="lab_iff_TwoThousandFourteenToTwoThousandSixteenCycleMember_338D091600E194A0447AA21E98911EB3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2014-2016 Cycle [Member]</link:label>
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    <link:label id="lab_iff_TwoThousandFourteenToTwoThousandSixteenCycleMember_338D091600E194A0447AA21E98911EB3_documentation_en-US" xlink:label="lab_iff_TwoThousandFourteenToTwoThousandSixteenCycleMember_338D091600E194A0447AA21E98911EB3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Two Thousand Fourteen To Two Thousand Sixteen Cycle [Member]</link:label>
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    <link:label id="lab_iff_LesseeOperatingLeaseLiabilityPaymentsDueYearTwoAndThree_FE374B591EAFA083980059C2879DFF73_terseLabel_en-US" xlink:label="lab_iff_LesseeOperatingLeaseLiabilityPaymentsDueYearTwoAndThree_FE374B591EAFA083980059C2879DFF73" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating lease, 1-3 years</link:label>
    <link:label id="lab_iff_LesseeOperatingLeaseLiabilityPaymentsDueYearTwoAndThree_FE374B591EAFA083980059C2879DFF73_label_en-US" xlink:label="lab_iff_LesseeOperatingLeaseLiabilityPaymentsDueYearTwoAndThree_FE374B591EAFA083980059C2879DFF73" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Due Year Two And Three</link:label>
    <link:label id="lab_iff_LesseeOperatingLeaseLiabilityPaymentsDueYearTwoAndThree_FE374B591EAFA083980059C2879DFF73_documentation_en-US" xlink:label="lab_iff_LesseeOperatingLeaseLiabilityPaymentsDueYearTwoAndThree_FE374B591EAFA083980059C2879DFF73" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Due Year Two And Three</link:label>
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    <link:label id="lab_iff_LesseeOperatingLeaseLiabilityPaymentsDueYearFourAndFive_A1BB2CE3B9EF305E89E959C2CB004920_terseLabel_en-US" xlink:label="lab_iff_LesseeOperatingLeaseLiabilityPaymentsDueYearFourAndFive_A1BB2CE3B9EF305E89E959C2CB004920" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating lease, 3-5 years</link:label>
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    <link:label id="lab_iff_LesseeOperatingLeaseLiabilityPaymentsDueYearFourAndFive_A1BB2CE3B9EF305E89E959C2CB004920_documentation_en-US" xlink:label="lab_iff_LesseeOperatingLeaseLiabilityPaymentsDueYearFourAndFive_A1BB2CE3B9EF305E89E959C2CB004920" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Due Year Four And Five</link:label>
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_C1F0AB5B63BD91D8D91359C2CC01EC5A_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_C1F0AB5B63BD91D8D91359C2CC01EC5A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating lease, After 5 years</link:label>
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_BB377DCC461B73390F2959C2CCFBBA92_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_BB377DCC461B73390F2959C2CCFBBA92" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Less Imputed Interest</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_BB377DCC461B73390F2959C2CCFBBA92_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_BB377DCC461B73390F2959C2CCFBBA92" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Undiscounted Excess Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_BB377DCC461B73390F2959C2CCFBBA92" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OperatingLeaseLiability_03C40D2CDBF88A5242A359C2CE623C53_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiability_03C40D2CDBF88A5242A359C2CE623C53" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating Lease, Liability</link:label>
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    <link:label id="lab_iff_FinanceLeaseLiabilityPaymentsDueYearTwoAndThree_69D172F081F6CBC866B859C888A9E7E4_terseLabel_en-US" xlink:label="lab_iff_FinanceLeaseLiabilityPaymentsDueYearTwoAndThree_69D172F081F6CBC866B859C888A9E7E4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing lease, 1-3 years</link:label>
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    <link:label id="lab_iff_FinanceLeaseLiabilityPaymentsDueYearTwoAndThree_69D172F081F6CBC866B859C888A9E7E4_documentation_en-US" xlink:label="lab_iff_FinanceLeaseLiabilityPaymentsDueYearTwoAndThree_69D172F081F6CBC866B859C888A9E7E4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Finance Lease, Liability, Payments, Due Year Two And Three</link:label>
    <link:loc xlink:href="iff-20191231.xsd#iff_FinanceLeaseLiabilityPaymentsDueYearTwoAndThree" xlink:label="loc_iff_FinanceLeaseLiabilityPaymentsDueYearTwoAndThree_69D172F081F6CBC866B859C888A9E7E4" xlink:type="locator" />
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    <link:label id="lab_iff_FinanceLeaseLiabilityPaymentsDueYearFourAndFive_4E66D344A22DDBEBF41C59C9662CB9E0_terseLabel_en-US" xlink:label="lab_iff_FinanceLeaseLiabilityPaymentsDueYearFourAndFive_4E66D344A22DDBEBF41C59C9662CB9E0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing lease, 3-5 years</link:label>
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    <link:label id="lab_iff_FinanceLeaseLiabilityPaymentsDueYearFourAndFive_4E66D344A22DDBEBF41C59C9662CB9E0_documentation_en-US" xlink:label="lab_iff_FinanceLeaseLiabilityPaymentsDueYearFourAndFive_4E66D344A22DDBEBF41C59C9662CB9E0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Finance Lease, Liability, Payments, Due Year Four And Five</link:label>
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    <link:label id="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_5579289458C9228CCD3E59C9C2045503_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_5579289458C9228CCD3E59C9C2045503" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing lease, After 5 years</link:label>
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    <link:label id="lab_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_3C8FDE16CDC35BAFD15159C9FC1AB9C0_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_3C8FDE16CDC35BAFD15159C9FC1AB9C0" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Less Imputed Interest</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_BD3DAEBA56D39AA2FE337F39EE0A078A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_GainLossOnDispositionOfAssets_72E4D78A73AF0A1C1F1C7F39EE0ADB03_label_en-US" xlink:label="lab_us-gaap_GainLossOnDispositionOfAssets_72E4D78A73AF0A1C1F1C7F39EE0ADB03" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainLossOnDispositionOfAssets" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets_72E4D78A73AF0A1C1F1C7F39EE0ADB03" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnDispositionOfAssets_72E4D78A73AF0A1C1F1C7F39EE0ADB03" xlink:to="lab_us-gaap_GainLossOnDispositionOfAssets_72E4D78A73AF0A1C1F1C7F39EE0ADB03" xlink:type="arc" />
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    <link:label id="lab_us-gaap_GainLossOnSaleOfDerivatives_AFFCD70D354712A26E917F39EE0B99A5_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfDerivatives_AFFCD70D354712A26E917F39EE0B99A5" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Gain on deal contingent derivatives</link:label>
    <link:label id="lab_us-gaap_GainLossOnSaleOfDerivatives_AFFCD70D354712A26E917F39EE0B99A5_label_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfDerivatives_AFFCD70D354712A26E917F39EE0B99A5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Sale of Derivatives</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_0794AF85809B4D360CFA7F39EE0C24EE" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_384FDF610A21D388C7787F39EE0D2712" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_1AA3105DDC6B56FD561B7F39EE0D543C_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_1AA3105DDC6B56FD561B7F39EE0D543C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1AA3105DDC6B56FD561B7F39EE0D543C" xlink:type="locator" />
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentForContingentConsiderationLiabilityInvestingActivities_DABB4A32E3841686C0A77F39EE0ECF26" xlink:to="lab_us-gaap_PaymentForContingentConsiderationLiabilityInvestingActivities_DABB4A32E3841686C0A77F39EE0ECF26" xlink:type="arc" />
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForProceedsFromHedgeInvestingActivities_FC820C855112FAA84E767F39EE0FD830" xlink:to="lab_us-gaap_PaymentsForProceedsFromHedgeInvestingActivities_FC820C855112FAA84E767F39EE0FD830" xlink:type="arc" />
    <link:label id="lab_iff_ProceedsFromTerminationOfLifeInsuranceContracts_F036CC05A2CC46D8E2DB7F39EE0F993C_terseLabel_en-US" xlink:label="lab_iff_ProceedsFromTerminationOfLifeInsuranceContracts_F036CC05A2CC46D8E2DB7F39EE0F993C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from life insurance contracts</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_4612EDC2E55D4052BF4F7F39EE0F0AB4_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_4612EDC2E55D4052BF4F7F39EE0F0AB4" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash used in investing activities</link:label>
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    <link:label id="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity_755AF5988741201869BB7F39EE103834_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity_755AF5988741201869BB7F39EE103834" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sales of equity securities, net of issuance costs</link:label>
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    <link:label id="lab_us-gaap_UnrecognizedTaxBenefits_34BF96D81090D262B75E0128DDAB46C3_periodEndLabel_en-US" xlink:label="lab_us-gaap_UnrecognizedTaxBenefits_34BF96D81090D262B75E0128DDAB46C3" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Balance of unrecognized tax benefits at end of year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnrecognizedTaxBenefits" xlink:label="loc_us-gaap_UnrecognizedTaxBenefits_34BF96D81090D262B75E0128DDAB46C3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnrecognizedTaxBenefits_34BF96D81090D262B75E0128DDAB46C3" xlink:to="lab_us-gaap_UnrecognizedTaxBenefits_34BF96D81090D262B75E0128DDAB46C3" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_56463DC354A6A37F27687F39ED3431E7_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_56463DC354A6A37F27687F39ED3431E7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated annual amortization, 2019</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_56463DC354A6A37F27687F39ED3431E7_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_56463DC354A6A37F27687F39ED3431E7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_56463DC354A6A37F27687F39ED3431E7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_56463DC354A6A37F27687F39ED3431E7" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_56463DC354A6A37F27687F39ED3431E7" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_27E4C53FD45811EEE6A07F39ED34BE44_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_27E4C53FD45811EEE6A07F39ED34BE44" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Estimated annual amortization, 2020</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_27E4C53FD45811EEE6A07F39ED34BE44_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_27E4C53FD45811EEE6A07F39ED34BE44" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_27E4C53FD45811EEE6A07F39ED34BE44" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_27E4C53FD45811EEE6A07F39ED34BE44" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_27E4C53FD45811EEE6A07F39ED34BE44" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_0C54749B227B4EEE63C27F39ED34D439_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_0C54749B227B4EEE63C27F39ED34D439" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Estimated annual amortization, 2021</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_0C54749B227B4EEE63C27F39ED34D439_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_0C54749B227B4EEE63C27F39ED34D439" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_0C54749B227B4EEE63C27F39ED34D439" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_0C54749B227B4EEE63C27F39ED34D439" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_0C54749B227B4EEE63C27F39ED34D439" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_5E499312A498B2DE4C337F39ED34AB71_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_5E499312A498B2DE4C337F39ED34AB71" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated annual amortization, 2022</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_5E499312A498B2DE4C337F39ED34AB71_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_5E499312A498B2DE4C337F39ED34AB71" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_5E499312A498B2DE4C337F39ED34AB71" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_5E499312A498B2DE4C337F39ED34AB71" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_5E499312A498B2DE4C337F39ED34AB71" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_018DD9577A80D53D92BB7F39ED340043_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_018DD9577A80D53D92BB7F39ED340043" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated annual amortization, 2023</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_018DD9577A80D53D92BB7F39ED340043_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_018DD9577A80D53D92BB7F39ED340043" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_018DD9577A80D53D92BB7F39ED340043" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_018DD9577A80D53D92BB7F39ED340043" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_018DD9577A80D53D92BB7F39ED340043" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_F705A517D6E136D3E81A5EB1B87F2095_terseLabel_en-US" xlink:label="lab_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_F705A517D6E136D3E81A5EB1B87F2095" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]</link:label>
    <link:label id="lab_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_F705A517D6E136D3E81A5EB1B87F2095_label_en-US" xlink:label="lab_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_F705A517D6E136D3E81A5EB1B87F2095" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_F705A517D6E136D3E81A5EB1B87F2095" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_F705A517D6E136D3E81A5EB1B87F2095" xlink:to="lab_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_F705A517D6E136D3E81A5EB1B87F2095" xlink:type="arc" />
    <link:label id="lab_us-gaap_DesignatedAsHedgingInstrumentMember_FCB8D3E6E402D888E2D75EB1B8831620_terseLabel_en-US" xlink:label="lab_us-gaap_DesignatedAsHedgingInstrumentMember_FCB8D3E6E402D888E2D75EB1B8831620" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Designated as Hedging Instrument [Member]</link:label>
    <link:label id="lab_us-gaap_DesignatedAsHedgingInstrumentMember_FCB8D3E6E402D888E2D75EB1B8831620_label_en-US" xlink:label="lab_us-gaap_DesignatedAsHedgingInstrumentMember_FCB8D3E6E402D888E2D75EB1B8831620" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Designated as Hedging Instrument [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DesignatedAsHedgingInstrumentMember" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_FCB8D3E6E402D888E2D75EB1B8831620" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DesignatedAsHedgingInstrumentMember_FCB8D3E6E402D888E2D75EB1B8831620" xlink:to="lab_us-gaap_DesignatedAsHedgingInstrumentMember_FCB8D3E6E402D888E2D75EB1B8831620" xlink:type="arc" />
    <link:label id="lab_iff_ForeignCurrencyContractAndInterestRateSwapMember_5801B26E560E16D62E395EB1B8844E7B_terseLabel_en-US" xlink:label="lab_iff_ForeignCurrencyContractAndInterestRateSwapMember_5801B26E560E16D62E395EB1B8844E7B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign Currency Contract And Interest Rate Swap [Member]</link:label>
    <link:label id="lab_iff_ForeignCurrencyContractAndInterestRateSwapMember_5801B26E560E16D62E395EB1B8844E7B_label_en-US" xlink:label="lab_iff_ForeignCurrencyContractAndInterestRateSwapMember_5801B26E560E16D62E395EB1B8844E7B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Currency Contract And Interest Rate Swap [Member]</link:label>
    <link:label id="lab_iff_ForeignCurrencyContractAndInterestRateSwapMember_5801B26E560E16D62E395EB1B8844E7B_documentation_en-US" xlink:label="lab_iff_ForeignCurrencyContractAndInterestRateSwapMember_5801B26E560E16D62E395EB1B8844E7B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foreign Currency Contract And Interest Rate Swap [Member]</link:label>
    <link:loc xlink:href="iff-20191231.xsd#iff_ForeignCurrencyContractAndInterestRateSwapMember" xlink:label="loc_iff_ForeignCurrencyContractAndInterestRateSwapMember_5801B26E560E16D62E395EB1B8844E7B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_iff_ForeignCurrencyContractAndInterestRateSwapMember_5801B26E560E16D62E395EB1B8844E7B" xlink:to="lab_iff_ForeignCurrencyContractAndInterestRateSwapMember_5801B26E560E16D62E395EB1B8844E7B" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativesFairValueLineItems_CCF1B4991C2A0678477D5EB1B8858775_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativesFairValueLineItems_CCF1B4991C2A0678477D5EB1B8858775" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivatives, Fair Value [Line Items]</link:label>
    <link:label id="lab_us-gaap_DerivativesFairValueLineItems_CCF1B4991C2A0678477D5EB1B8858775_label_en-US" xlink:label="lab_us-gaap_DerivativesFairValueLineItems_CCF1B4991C2A0678477D5EB1B8858775" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivatives, Fair Value [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_CCF1B4991C2A0678477D5EB1B8858775" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_CCF1B4991C2A0678477D5EB1B8858775" xlink:to="lab_us-gaap_DerivativesFairValueLineItems_CCF1B4991C2A0678477D5EB1B8858775" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestIncomeExpenseNet_91E65E090FE2A5E1CFDE5EB1B885DCD8_terseLabel_en-US" xlink:label="lab_us-gaap_InterestIncomeExpenseNet_91E65E090FE2A5E1CFDE5EB1B885DCD8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest Income (Expense), Net</link:label>
    <link:label id="lab_us-gaap_InterestIncomeExpenseNet_91E65E090FE2A5E1CFDE5EB1B885DCD8_label_en-US" xlink:label="lab_us-gaap_InterestIncomeExpenseNet_91E65E090FE2A5E1CFDE5EB1B885DCD8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Income (Expense), Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestIncomeExpenseNet" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_91E65E090FE2A5E1CFDE5EB1B885DCD8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestIncomeExpenseNet_91E65E090FE2A5E1CFDE5EB1B885DCD8" xlink:to="lab_us-gaap_InterestIncomeExpenseNet_91E65E090FE2A5E1CFDE5EB1B885DCD8" xlink:type="arc" />
    <link:label id="lab_iff_DeferredGainLossOnTerminatedInterestRateContracts_93EBEBE2AC55F9F4D92D5EB1B8851ABC_negatedTerseLabel_en-US" xlink:label="lab_iff_DeferredGainLossOnTerminatedInterestRateContracts_93EBEBE2AC55F9F4D92D5EB1B8851ABC" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Loss incurred on termination of interest rate swaps</link:label>
    <link:label id="lab_iff_DeferredGainLossOnTerminatedInterestRateContracts_93EBEBE2AC55F9F4D92D5EB1B8851ABC_label_en-US" xlink:label="lab_iff_DeferredGainLossOnTerminatedInterestRateContracts_93EBEBE2AC55F9F4D92D5EB1B8851ABC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Gain Loss On Terminated Interest Rate Contracts</link:label>
    <link:label id="lab_iff_DeferredGainLossOnTerminatedInterestRateContracts_93EBEBE2AC55F9F4D92D5EB1B8851ABC_documentation_en-US" xlink:label="lab_iff_DeferredGainLossOnTerminatedInterestRateContracts_93EBEBE2AC55F9F4D92D5EB1B8851ABC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Deferred Gain Loss On Terminated Interest Rate Contracts</link:label>
    <link:loc xlink:href="iff-20191231.xsd#iff_DeferredGainLossOnTerminatedInterestRateContracts" xlink:label="loc_iff_DeferredGainLossOnTerminatedInterestRateContracts_93EBEBE2AC55F9F4D92D5EB1B8851ABC" xlink:type="locator" />
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    <link:label id="lab_us-gaap_GainLossOnSaleOfDerivatives_DE8206F745F230A546A65EB1B8850ABA_terseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfDerivatives_DE8206F745F230A546A65EB1B8850ABA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gain on deal contingent derivatives</link:label>
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