<SEC-DOCUMENT>0000915389-23-000050.txt : 20230228
<SEC-HEADER>0000915389-23-000050.hdr.sgml : 20230228
<ACCEPTANCE-DATETIME>20230228161440
ACCESSION NUMBER:		0000915389-23-000050
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20230224
FILED AS OF DATE:		20230228
DATE AS OF CHANGE:		20230228

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WALKER KELLYE L.
		CENTRAL INDEX KEY:			0001253637

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12626
		FILM NUMBER:		23685469

	MAIL ADDRESS:	
		STREET 1:		200 SOUTH WILCOX DRIVE
		CITY:			KINGSPORT
		STATE:			TN
		ZIP:			37660

	FORMER NAME:	
		FORMER CONFORMED NAME:	WALKER KELLYE L
		DATE OF NAME CHANGE:	20030711

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			EASTMAN CHEMICAL CO
		CENTRAL INDEX KEY:			0000915389
		STANDARD INDUSTRIAL CLASSIFICATION:	PLASTICS, MATERIALS, SYNTH RESINS & NONVULCAN ELASTOMERS [2821]
		IRS NUMBER:				621539359
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		PO BOX 511
		STREET 2:		200 SOUTH WILCOX DRIVE
		CITY:			KINGSPORT
		STATE:			TN
		ZIP:			37660
		BUSINESS PHONE:		4232292000

	MAIL ADDRESS:	
		STREET 1:		P O BOX 511 B-54D
		CITY:			KINGSPORT
		STATE:			TN
		ZIP:			37662
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_167761886610313.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2023-02-24</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000915389</issuerCik>
        <issuerName>EASTMAN CHEMICAL CO</issuerName>
        <issuerTradingSymbol>EMN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001253637</rptOwnerCik>
            <rptOwnerName>WALKER KELLYE L.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>200 S. WILCOX DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>KINGSPORT</rptOwnerCity>
            <rptOwnerState>TN</rptOwnerState>
            <rptOwnerZipCode>37660</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>EVP, CLO &amp; Corp. Secretary</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Employee Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>83.84</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2023-02-24</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>16471</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2024-02-24</value>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2033-02-23</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>16471.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>16471</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">One-third of the option becomes exercisable on February 24, 2024, February 24, 2025, and February 24, 2026, respectively.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Mark D. Austin, by Power of Attorney for Kellye L. Walker</signatureName>
        <signatureDate>2023-02-28</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
