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  <xs:element id="iff_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSharesPurchasedByEmployees" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSharesPurchasedByEmployees" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="iff_TrancheBRevolvingCreditFacilityMember" abstract="true" name="TrancheBRevolvingCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_AccountsReceivablesOutstandingLessThan90Days" abstract="false" name="AccountsReceivablesOutstandingLessThan90Days" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="iff_CommitmentsAndContingenciesLineItems" abstract="true" name="CommitmentsAndContingenciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="iff_TangibleEquityRateSettlementRate" abstract="false" name="TangibleEquityRateSettlementRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="iff_SeniorUnsecuredTermLoanFacilitiesMember" abstract="true" name="SeniorUnsecuredTermLoanFacilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_RevolverBorrowingsMember" abstract="true" name="RevolverBorrowingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_RepurchasePriceAsPercentageOfPrincipalAmountOfSeniorNotes" abstract="false" name="RepurchasePriceAsPercentageOfPrincipalAmountOfSeniorNotes" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="iff_GainContingencyExpectedRelocationPayments" abstract="false" name="GainContingencyExpectedRelocationPayments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iff_AmortizationPeriodOfInternalAndExternalDevelopmentCosts" abstract="false" name="AmortizationPeriodOfInternalAndExternalDevelopmentCosts" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="iff_TwoThousandNineteenToTwoThousandTwentyOneCycleMember" abstract="true" name="TwoThousandNineteenToTwoThousandTwentyOneCycleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_GuangzhouChinaMember" abstract="true" name="GuangzhouChinaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_ScentMember" abstract="true" name="ScentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
