<SEC-DOCUMENT>0001306830-24-000135.txt : 20240517
<SEC-HEADER>0001306830-24-000135.hdr.sgml : 20240517
<ACCEPTANCE-DATETIME>20240517163729
ACCESSION NUMBER:		0001306830-24-000135
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20240515
FILED AS OF DATE:		20240517
DATE AS OF CHANGE:		20240517

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Kissire Deborah J.
		CENTRAL INDEX KEY:			0001648794
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32410
		FILM NUMBER:		24960474

	MAIL ADDRESS:	
		STREET 1:		210 E. EARLL DRIVE
		CITY:			PHOENIX
		STATE:			AZ
		ZIP:			85012

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Celanese Corp
		CENTRAL INDEX KEY:			0001306830
		STANDARD INDUSTRIAL CLASSIFICATION:	PLASTIC MATERIAL, SYNTH RESIN/RUBBER, CELLULOS (NO GLASS) [2820]
		ORGANIZATION NAME:           	08 Industrial Applications and Services
		IRS NUMBER:				980420726
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		222 W. LAS COLINAS BLVD., SUITE 900N
		CITY:			IRVING
		STATE:			TX
		ZIP:			75039-5421
		BUSINESS PHONE:		972-443-4000

	MAIL ADDRESS:	
		STREET 1:		222 W. LAS COLINAS BLVD., SUITE 900N
		CITY:			IRVING
		STATE:			TX
		ZIP:			75039-5421

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Celanese CORP
		DATE OF NAME CHANGE:	20041102

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Blackstone Crystal Holdings Capital Partners (Cayman) IV Ltd.
		DATE OF NAME CHANGE:	20041022
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wk-form4_1715978219.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2024-05-15</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001306830</issuerCik>
        <issuerName>Celanese Corp</issuerName>
        <issuerTradingSymbol>CE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001648794</rptOwnerCik>
            <rptOwnerName>Kissire Deborah J.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CELANESE CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>222 W LAS COLINAS BLVD, SUITE 900N</rptOwnerStreet2>
            <rptOwnerCity>IRVING</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75039</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2024-05-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1114</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>156.96</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1214</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Annual grant of restricted stock units pursuant to the Company's Amended and Restated 2018 Global Incentive Plan. The restricted stock units vest in full on the one-year anniversary of the date of grant.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Adam R. Santosuosso, Attorney-in-Fact for Deborah J. Kissire</signatureName>
        <signatureDate>2024-05-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
