<SEC-DOCUMENT>0001306830-25-000243.txt : 20251211
<SEC-HEADER>0001306830-25-000243.hdr.sgml : 20251211
<ACCEPTANCE-DATETIME>20251211162854
ACCESSION NUMBER:		0001306830-25-000243
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20251209
FILED AS OF DATE:		20251211
DATE AS OF CHANGE:		20251211

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Kyrish Chuck
		CENTRAL INDEX KEY:			0002000660
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32410
		FILM NUMBER:		251565353

	MAIL ADDRESS:	
		STREET 1:		222 W. LAS COLINAS BLVD
		STREET 2:		SUITE 900N
		CITY:			IRVING
		STATE:			TX
		ZIP:			75039

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
		EIN:				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_1765488531.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-12-09</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002000660</rptOwnerCik>
            <rptOwnerName>Kyrish Chuck</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O 222 W LAS COLINAS BLVD, SUITE 900N</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>IRVING</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75039</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SVP &amp; CFO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-12-09</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>5000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>41.03</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>10914.476</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The reported price in this line is a weighted average sales price.  These shares were sold in multiple transactions at prices ranging from $40.885 to $41.112.  The reporting person will provide to the Company, any security holder of the Company, or the staff of the SEC, upon request, full information regarding the number of shares sold at each price.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Blake Feikema, Attorney-in-Fact for Chuck Kyrish</signatureName>
        <signatureDate>2025-12-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
