﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" returnVersion="2021v4.1">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2023-10-02T13:30:09Z</ReturnTs>
    <TaxPeriodEndDt>2021-12-31</TaxPeriodEndDt>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2021-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>526060201</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>AMERICAN CHEMICAL SOCIETY</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>AMER</BusinessNameControlTxt>
      <PhoneNum>8647607685</PhoneNum>
      <USAddress>
        <AddressLine1Txt>342 COMPUTER OURT CLEMSON UNIVERSIT</AddressLine1Txt>
        <CityNm>ANDERSON</CityNm>
        <StateAbbreviationCd>SC</StateAbbreviationCd>
        <ZIPCd>29625</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>Brian Powell</PersonNm>
      <PersonTitleTxt>Treasurer</PersonTitleTxt>
      <PhoneNum>8647607685</PhoneNum>
      <SignatureDt>2023-10-02</SignatureDt>
    </BusinessOfficerGrp>
    <SigningOfficerGrp>
      <PersonFullName>
        <PersonFirstNm>Brian</PersonFirstNm>
        <PersonLastNm>Powell</PersonLastNm>
      </PersonFullName>
    </SigningOfficerGrp>
    <TaxYr>2021</TaxYr>
    <BuildTS>2023-04-26 12:10:37Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="3">
    <IRS990EZ documentId="POSTCARDb3474db">
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
      <Organization501c3Ind referenceDocumentId="990xScheduleA" referenceDocumentName="IRS990ScheduleA">X</Organization501c3Ind>
      <TypeOfOrganizationAssocInd>X</TypeOfOrganizationAssocInd>
      <GrossReceiptsAmt>41699</GrossReceiptsAmt>
      <ContributionsGiftsGrantsEtcAmt>45</ContributionsGiftsGrantsEtcAmt>
      <ProgramServiceRevenueAmt>0</ProgramServiceRevenueAmt>
      <MembershipDuesAmt>40581</MembershipDuesAmt>
      <InvestmentIncomeAmt>8</InvestmentIncomeAmt>
      <SaleOfAssetsGrossAmt>0</SaleOfAssetsGrossAmt>
      <CostOrOtherBasisExpenseSaleAmt>0</CostOrOtherBasisExpenseSaleAmt>
      <GainOrLossFromSaleOfAssetsAmt>0</GainOrLossFromSaleOfAssetsAmt>
      <GamingGrossIncomeAmt>0</GamingGrossIncomeAmt>
      <FundraisingGrossIncomeAmt>0</FundraisingGrossIncomeAmt>
      <SpecialEventsDirectExpensesAmt>0</SpecialEventsDirectExpensesAmt>
      <SpecialEventsNetIncomeLossAmt>0</SpecialEventsNetIncomeLossAmt>
      <GrossSalesOfInventoryAmt>0</GrossSalesOfInventoryAmt>
      <CostOfGoodsSoldAmt>0</CostOfGoodsSoldAmt>
      <GrossProfitLossSlsOfInvntryAmt>0</GrossProfitLossSlsOfInvntryAmt>
      <OtherRevenueTotalAmt>1065</OtherRevenueTotalAmt>
      <TotalRevenueAmt>41699</TotalRevenueAmt>
      <GrantsAndSimilarAmountsPaidAmt>3000</GrantsAndSimilarAmountsPaidAmt>
      <BenefitsPaidToOrForMembersAmt>0</BenefitsPaidToOrForMembersAmt>
      <SalariesOtherCompEmplBnftAmt>0</SalariesOtherCompEmplBnftAmt>
      <FeesAndOtherPymtToIndCntrctAmt>0</FeesAndOtherPymtToIndCntrctAmt>
      <OccupancyRentUtltsAndMaintAmt>0</OccupancyRentUtltsAndMaintAmt>
      <PrintingPublicationsPostageAmt>1014</PrintingPublicationsPostageAmt>
      <OtherExpensesTotalAmt>0</OtherExpensesTotalAmt>
      <TotalExpensesAmt>4014</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>37685</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>187257</NetAssetsOrFundBalancesBOYAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <NetAssetsOrFundBalancesEOYAmt>224942</NetAssetsOrFundBalancesEOYAmt>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>187257</BOYAmt>
        <EOYAmt>224942</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <LandAndBuildingsGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </LandAndBuildingsGrp>
      <OtherAssetsTotalDetail>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </OtherAssetsTotalDetail>
      <Form990TotalAssetsGrp>
        <BOYAmt>187257</BOYAmt>
        <EOYAmt>224942</EOYAmt>
      </Form990TotalAssetsGrp>
      <SumOfTotalLiabilitiesGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </SumOfTotalLiabilitiesGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>187257</BOYAmt>
        <EOYAmt>224942</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <InfoInScheduleOPartIIIInd>X</InfoInScheduleOPartIIIInd>
      <PrimaryExemptPurposeTxt>The Division of Nuclear Chemistry and Technology is a division of the American Chemical Society We are a professional organization to promote chemistry The division supports awards to members and students and sponsors conferencesmeetings</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>The ACS DNCT supported symposia at ACS national meetings These symposia provided information on the currentemerging science relevant to the division</DescriptionProgramSrvcAccomTxt>
        <ProgramServiceExpensesAmt>1000</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>The division supports awards to recognize outstanding performance of students and members</DescriptionProgramSrvcAccomTxt>
        <ProgramServiceExpensesAmt>2000</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>The division requires postal andweb services to communicate with members</DescriptionProgramSrvcAccomTxt>
        <ProgramServiceExpensesAmt>1014</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>4014</TotalProgramServiceExpensesAmt>
      <InfoInScheduleOPartIVInd>X</InfoInScheduleOPartIVInd>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Nathalie Wall</PersonNm>
        <TitleTxt>Program chair</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Richard Wilson</PersonNm>
        <TitleTxt>Chair Elect 2023</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Justin Walensky</PersonNm>
        <TitleTxt>Vice Chair 2022</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Brian Powell</PersonNm>
        <TitleTxt>Treasurer</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Amy Hixon</PersonNm>
        <TitleTxt>Secretary</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Graham Peaslee</PersonNm>
        <TitleTxt>Councilor</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Sylvia Jurisson</PersonNm>
        <TitleTxt>Councilor</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <ActivitiesNotPreviouslyRptInd>false</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>false</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>false</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>false</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>false</OrganizationDissolvedEtcInd>
      <MadeLoansToFromOfficersInd>false</MadeLoansToFromOfficersInd>
      <EngagedInExcessBenefitTransInd>false</EngagedInExcessBenefitTransInd>
      <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
      <StatesWhereCopyOfReturnIsFldCd>SC</StatesWhereCopyOfReturnIsFldCd>
      <BooksInCareOfDetail>
        <PersonNm>Brian Powell</PersonNm>
        <USAddress>
          <AddressLine1Txt>342 Computer Court</AddressLine1Txt>
          <CityNm>Anderson</CityNm>
          <StateAbbreviationCd>SC</StateAbbreviationCd>
          <ZIPCd>29625</ZIPCd>
        </USAddress>
        <PhoneNum>8647607685</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>
                            false
                        </ForeignFinancialAccountInd>
      <ForeignOfficeInd>
                            false
                        </ForeignOfficeInd>
      <DonorAdvisedFndsInd>false</DonorAdvisedFndsInd>
      <OperateHospitalInd>false</OperateHospitalInd>
      <TanningServicesProvidedInd>false</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>false</RelatedOrganizationCtrlEntInd>
      <TransactionWithControlEntInd>false</TransactionWithControlEntInd>
      <PoliticalCampaignActyInd>false</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>false</LobbyingActivitiesInd>
      <SchoolOperatingInd>false</SchoolOperatingInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>false</TrnsfrExmptNonChrtblRltdOrgInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
      <PartVIHghstPdCntrctProfSrvcTxt>NONE</PartVIHghstPdCntrctProfSrvcTxt>
      <FiledScheduleAInd>false</FiledScheduleAInd>
    </IRS990EZ>
    <IRS990ScheduleA documentId="990xScheduleA">
      <PubliclySupportedOrg509a2Ind>X</PubliclySupportedOrg509a2Ind>
      <GiftsGrantsContriRcvd170Grp></GiftsGrantsContriRcvd170Grp>
      <TaxRevLeviedOrgnztnlBnft170Grp></TaxRevLeviedOrgnztnlBnft170Grp>
      <GovtFurnSrvcFcltsVl170Grp></GovtFurnSrvcFcltsVl170Grp>
      <TotalCalendarYear170Grp></TotalCalendarYear170Grp>
      <PublicSupportTotal170Amt>0</PublicSupportTotal170Amt>
      <GrossInvestmentIncome170Grp></GrossInvestmentIncome170Grp>
      <UnrelatedBusinessNetIncm170Grp></UnrelatedBusinessNetIncm170Grp>
      <OtherIncome170Grp></OtherIncome170Grp>
      <TotalSupportAmt>0</TotalSupportAmt>
      <PublicSupportCY170Pct>0</PublicSupportCY170Pct>
      <PublicSupportPY170Pct>0</PublicSupportPY170Pct>
      <GiftsGrantsContrisRcvd509Grp>
        <CurrentTaxYearMinus4YearsAmt>40150</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>33484</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>58382</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>24302</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>40581</CurrentTaxYearAmt>
        <TotalAmt>196899</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsAdmissionsGrp></GrossReceiptsAdmissionsGrp>
      <GrossReceiptsNonUnrltBusGrp></GrossReceiptsNonUnrltBusGrp>
      <TaxRevLeviedOrgnztnlBnft509Grp></TaxRevLeviedOrgnztnlBnft509Grp>
      <GovtFurnSrvcFcltsVl509Grp></GovtFurnSrvcFcltsVl509Grp>
      <Total509Grp>
        <CurrentTaxYearMinus4YearsAmt>40150</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>33484</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>58382</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>24302</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>40581</CurrentTaxYearAmt>
        <TotalAmt>196899</TotalAmt>
      </Total509Grp>
      <AmountsRcvdDsqlfyPersonGrp></AmountsRcvdDsqlfyPersonGrp>
      <SubstantialContributorsAmtGrp></SubstantialContributorsAmtGrp>
      <SubstAndDsqlfyPrsnsTotGrp></SubstAndDsqlfyPrsnsTotGrp>
      <PublicSupportTotal509Amt>196899</PublicSupportTotal509Amt>
      <GrossInvestmentIncome509Grp>
        <CurrentTaxYearMinus4YearsAmt>23</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>29</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>23</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>47</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>45</CurrentTaxYearAmt>
        <TotalAmt>167</TotalAmt>
      </GrossInvestmentIncome509Grp>
      <Post1975UBTIGrp></Post1975UBTIGrp>
      <InvestmentIncomeAndUBTIGrp>
        <CurrentTaxYearMinus4YearsAmt>23</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>29</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>23</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>47</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>45</CurrentTaxYearAmt>
        <TotalAmt>167</TotalAmt>
      </InvestmentIncomeAndUBTIGrp>
      <NetIncomeFromOtherUBIGrp></NetIncomeFromOtherUBIGrp>
      <OtherIncome509Grp></OtherIncome509Grp>
      <TotalSupportCalendarYearGrp>
        <CurrentTaxYearMinus4YearsAmt>40173</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>33513</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>58405</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>24349</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>40626</CurrentTaxYearAmt>
        <TotalAmt>197066</TotalAmt>
      </TotalSupportCalendarYearGrp>
      <PublicSupportCY509Pct>1</PublicSupportCY509Pct>
      <PublicSupportPY509Pct>1</PublicSupportPY509Pct>
      <InvestmentIncomeCYPct>0.0008</InvestmentIncomeCYPct>
      <InvestmentIncomePYPct>0.0019</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
      <Form990SchAType3FuncIntGrp></Form990SchAType3FuncIntGrp>
    </IRS990ScheduleA>
    <IRS990ScheduleO documentId="990xScheduleO">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule O:</FormAndLineReferenceDesc>
        <ExplanationTxt>1. 2021 Form 900EZ, line 8, $1065.63 received in royalties 2. 2021 Form 900EZ, line 10, $2000 paid to division award winners, $1000 paid to American Chemical Society for meeting fees 3. 2021 Form 900EZ, line 31, Note that since many of our expenses are for in person scientific meetings, expenses were generally low for 2021. Additionally we have not yet paid the $17,000 due to the national organization for one of our major awards.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>