<SEC-DOCUMENT>0001306830-21-000055.txt : 20210225
<SEC-HEADER>0001306830-21-000055.hdr.sgml : 20210225
<ACCEPTANCE-DATETIME>20210225161352
ACCESSION NUMBER:		0001306830-21-000055
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210223
FILED AS OF DATE:		20210225
DATE AS OF CHANGE:		20210225

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Brown William M
		CENTRAL INDEX KEY:			0001350633

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32410
		FILM NUMBER:		21680484

	MAIL ADDRESS:	
		STREET 1:		HARRIS CORPORATION
		STREET 2:		1025 W NASA BOULEVARD
		CITY:			MELBOURNE
		STATE:			FL
		ZIP:			32919

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Celanese Corp
		CENTRAL INDEX KEY:			0001306830
		STANDARD INDUSTRIAL CLASSIFICATION:	PLASTIC MATERIAL, SYNTH RESIN/RUBBER, CELLULOS (NO GLASS) [2820]
		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>wf-form4_161428761415114.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-02-23</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001350633</rptOwnerCik>
            <rptOwnerName>Brown William M</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>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Phantom Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-02-23</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>37.159</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>136.96</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>37.159</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>7516.887</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Each share of phantom stock represents the right to receive one share of Common Stock or the cash value of one share of Common Stock.</footnote>
        <footnote id="F2">The reported phantom stock represents dividend equivalents on cash compensation and restricted stock units deferred under the Company's 2008 Deferred Compensation Plan (the &quot;Plan&quot;). As provided by the Plan, the reporting person may transfer a portion of the phantom stock account into an alternative investment account at any time.  The shares of phantom stock become payable in cash or shares of Common Stock, subject to certain conditions and as provided in the Plan, on the earlier of the date previously elected by the reporting person to receive payment or upon termination of the reporting person's service as a director of the Company.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Adam R. Santosuosso, Attorney-in-Fact for William M. Brown</signatureName>
        <signatureDate>2021-02-25</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
