content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001684092</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0001306830</issuerCik>
        <issuerName>Celanese Corp</issuerName>
        <secFileNumber>001-32410</secFileNumber>
        <issuerAddress>
          <com:street1>222 W. LAS COLINAS BLVD., SUITE 900N</com:street1>
          <com:city>IRVING</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>75039-5421</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>972-443-4000</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Kelly Thomas Francis</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Former Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Fidelity Brokerage Services LLC</name>
          <address>
            <com:street1>900 Salem Street</com:street1>
            <com:city>Smithfield</com:city>
            <com:stateOrCountry>RI</com:stateOrCountry>
            <com:zipCode>02917</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>27872</noOfUnitsSold>
        <aggregateMarketValue>1423283.68</aggregateMarketValue>
        <noOfUnitsOutstanding>109407366</noOfUnitsOutstanding>
        <approxSaleDate>05/09/2025</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/15/2021</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>9108</amountOfSecuritiesAcquired>
        <paymentDate>02/15/2021</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/15/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>7544</amountOfSecuritiesAcquired>
        <paymentDate>02/15/2022</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/15/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>9820</amountOfSecuritiesAcquired>
        <paymentDate>02/15/2024</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>03/14/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Open Market Purchase</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>1400</amountOfSecuritiesAcquired>
        <paymentDate>03/14/2024</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>05/09/2025</noticeDate>
        <signature>/s/ Gary Redman, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Thomas F. Kelly</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 4460}]
text: 144
  0001684092
  XXXXXXXX
  LIVE
  0001306830
  Celanese Corp
  001-32410
  222 W. LAS COLINAS BLVD., SUITE 900N
  IRVING
  TX
  75039-5421
  972-443-4000
  Kelly Thomas Francis
  Former Officer
  Common
  Fidelity Brokerage Services LLC
  900 Salem Street
  Smithfield
  RI
  02917
  27872
  1423283.68
  109407366
  05/09/2025
  NYSE
  Common
  02/15/2021
  Restricted Stock Vesting
  Issuer
  N
  9108
  02/15/2021
  Compensation
  Common
  02/15/2022
  Restricted Stock Vesting
  Issuer
  N
  7544
  02/15/2022
  Compensation
  Common
  02/15/2024
  Restricted Stock Vesting
  Issuer
  N
  9820
  02/15/2024
  Compensation
  Common
  03/14/2024
  Open Market Purchase
  Issuer
  N
  1400
  03/14/2024
  Cash
  Y
  05/09/2025
  /s/ Gary Redman, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Thomas F. Kelly