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  <xs:element id="iff_SegmentAdjustedOperatingEBITDA" abstract="false" name="SegmentAdjustedOperatingEBITDA" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iff_DivestitureAndIntegrationCosts" abstract="false" name="DivestitureAndIntegrationCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iff_StrategicInitiativesCosts" abstract="false" name="StrategicInitiativesCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iff_OtherCostsCredits" abstract="false" name="OtherCostsCredits" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iff_HealthAndBiosciencesMember" abstract="true" name="HealthAndBiosciencesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_DefinedBenefitPlanAmortizationAndDeferralsNet" abstract="false" name="DefinedBenefitPlanAmortizationAndDeferralsNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iff_OtherComponentsOfOtherNonoperatingIncomeExpense" abstract="false" name="OtherComponentsOfOtherNonoperatingIncomeExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iff_IncomeTaxesDisclosureTable" abstract="true" name="IncomeTaxesDisclosureTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="iff_IncomeTaxesLineItems" abstract="true" name="IncomeTaxesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="iff_NumberOfNewReportableSegments" abstract="false" name="NumberOfNewReportableSegments" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="iff_PrepaidAndOtherAssetsTable" abstract="true" name="PrepaidAndOtherAssetsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="iff_PrepaidAndOtherAssetsLineItems" abstract="true" name="PrepaidAndOtherAssetsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="iff_EarnoutReceivableCurrent" abstract="false" name="EarnoutReceivableCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iff_RebatesAndIncentivesPayableCurrent" abstract="false" name="RebatesAndIncentivesPayableCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iff_SeniorNotesEuroNotesDueTwoThousandTwentySixMember" abstract="true" name="SeniorNotesEuroNotesDueTwoThousandTwentySixMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_SeniorNotesDueTwoThousandTwentySevenMember" abstract="true" name="SeniorNotesDueTwoThousandTwentySevenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_SeniorNotesDueTwoThousandTwentyEightMember" abstract="true" name="SeniorNotesDueTwoThousandTwentyEightMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_SeniorNotesDueTwoThousandThirtyMember" abstract="true" name="SeniorNotesDueTwoThousandThirtyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_SeniorNotesDueTwoThousandFortyMember" abstract="true" name="SeniorNotesDueTwoThousandFortyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_SeniorNotesDueTwoThousandFortySevenMember" abstract="true" name="SeniorNotesDueTwoThousandFortySevenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_SeniorNotesDueTwoThousandFortyEightMember" abstract="true" name="SeniorNotesDueTwoThousandFortyEightMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_SeniorNotesDueTwoThousandFiftyMember" abstract="true" name="SeniorNotesDueTwoThousandFiftyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_A2026TermLoanMember" abstract="true" name="A2026TermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_BankBorrowingsAndOverdraftsMember" abstract="true" name="BankBorrowingsAndOverdraftsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_DebtInstrumentWeightedAverageTerm" abstract="false" name="DebtInstrumentWeightedAverageTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="iff_FinanceLeaseCost" abstract="false" name="FinanceLeaseCost" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iff_EuroNotesMember" abstract="true" name="EuroNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_ScheduleOfInformationByMajorCategoryOfCreditDerivativesContractsTable" abstract="true" name="ScheduleOfInformationByMajorCategoryOfCreditDerivativesContractsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="iff_ScheduleOfInformationByMajorCategoryOfCreditDerivativesContractsLineItems" abstract="true" name="ScheduleOfInformationByMajorCategoryOfCreditDerivativesContractsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="iff_DerivativeNotionalAmountNet" abstract="false" name="DerivativeNotionalAmountNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iff_AccumulatedOtherComprehensiveIncomeLossRollForward" abstract="true" name="AccumulatedOtherComprehensiveIncomeLossRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="iff_ScheduleOfReclassificationOfAccumulatedOtherComprehensiveIncomeLossTable" abstract="true" name="ScheduleOfReclassificationOfAccumulatedOtherComprehensiveIncomeLossTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="iff_ScheduleOfReclassificationOfAccumulatedOtherComprehensiveIncomeLossLineItems" abstract="true" name="ScheduleOfReclassificationOfAccumulatedOtherComprehensiveIncomeLossLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="iff_BankGuaranteesCommercialGuaranteesStandbyLettersOfCreditAndSuretyBondsMember" abstract="true" name="BankGuaranteesCommercialGuaranteesStandbyLettersOfCreditAndSuretyBondsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_PledgedAssetsMember" abstract="true" name="PledgedAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_FrutaromLitigationMember" abstract="true" name="FrutaromLitigationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_AntitrustClassActionMember" abstract="true" name="AntitrustClassActionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iff_BankGuaranteesCommercialGuaranteesStandbyLettersOfCreditAndSuretyBondsFacilityAmounts" abstract="false" name="BankGuaranteesCommercialGuaranteesStandbyLettersOfCreditAndSuretyBondsFacilityAmounts" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iff_BankGuaranteesStandbyLettersOfCreditAndCommercialGuaranteesAmountOutstanding" abstract="false" name="BankGuaranteesStandbyLettersOfCreditAndCommercialGuaranteesAmountOutstanding" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iff_AmountOfPledgedAssetsPrincipallyPropertyPlantAndEquipmentToCoverIncomeTaxAndIndirectTaxAssessments" abstract="false" name="AmountOfPledgedAssetsPrincipallyPropertyPlantAndEquipmentToCoverIncomeTaxAndIndirectTaxAssessments" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iff_BankGuaranteesAndPledgedAssetsToPursueDefensesRelatedToOtherContingencies" abstract="false" name="BankGuaranteesAndPledgedAssetsToPursueDefensesRelatedToOtherContingencies" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
