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<!--REG30 V1.0 (16-10-2025)-->
<xbrli:xbrl xmlns:in-capmkt="http://www.sebi.gov.in/xbrl/2025-08-31/in-capmkt" xmlns:in-capmkt-ent="http://www.sebi.gov.in/xbrl/Regulation_30_Restructuring/2025-08-31/in-capmkt/in-capmkt-ent" xmlns:in-capmkt-roles="http://www.sebi.gov.in/xbrl/Regulation_30_Restructuring/2025-08-31/in-capmkt-roles" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:net="http://www.xbrl.org/2009/role/net" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:iso4217="http://www.xbrl.org/2003/iso4217" xmlns:negated="http://www.xbrl.org/2009/role/negated" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xl="http://www.xbrl.org/2003/XLink"><link:schemaRef xlink:type="simple" xlink:href="in-capmkt-ent-2025-08-31.xsd"/><xbrli:context id="OneI"><xbrli:entity><xbrli:identifier scheme="http://www.sebi.gov.in/in-capmkt/ScripCode">506852</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-09-17</xbrli:instant></xbrli:period></xbrli:context><xbrli:context id="OneD"><xbrli:entity><xbrli:identifier scheme="http://www.sebi.gov.in/in-capmkt/ScripCode">506852</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2026-09-17</xbrli:startDate><xbrli:endDate>2026-09-17</xbrli:endDate></xbrli:period></xbrli:context><xbrli:unit id="INR"><xbrli:measure>iso4217:INR</xbrli:measure></xbrli:unit><xbrli:unit id="pure"><xbrli:measure>xbrli:pure</xbrli:measure></xbrli:unit><in-capmkt:ScripCode contextRef="OneI">506852</in-capmkt:ScripCode><in-capmkt:NameOfTheCompany contextRef="OneI">PRIMO CHEMICALS LIMITED</in-capmkt:NameOfTheCompany><in-capmkt:NSESymbol contextRef="OneI">PRIMO</in-capmkt:NSESymbol><in-capmkt:MSEISymbol contextRef="OneI">NOTLISTED</in-capmkt:MSEISymbol><in-capmkt:ISIN contextRef="OneI">INE607A01022</in-capmkt:ISIN><in-capmkt:TypeOfAnnouncementPertainingToRegulation30Restructuring contextRef="OneD">Update</in-capmkt:TypeOfAnnouncementPertainingToRegulation30Restructuring><in-capmkt:WhetherEventOrInformationDisclosedIsAnOutcomeOfBoardMeeting contextRef="OneD">false</in-capmkt:WhetherEventOrInformationDisclosedIsAnOutcomeOfBoardMeeting><in-capmkt:DateOfOccurrenceOfEvent contextRef="OneI">2026-09-16</in-capmkt:DateOfOccurrenceOfEvent><in-capmkt:TimeOfOccurrenceOfEvent contextRef="OneD">10:00:00</in-capmkt:TimeOfOccurrenceOfEvent><in-capmkt:DateOfInitialAnnouncement contextRef="OneI">2026-07-02</in-capmkt:DateOfInitialAnnouncement><in-capmkt:DateOfLatestAnnouncement contextRef="OneI">2026-07-02</in-capmkt:DateOfLatestAnnouncement><in-capmkt:DateOfReport contextRef="OneI">2026-09-17</in-capmkt:DateOfReport><in-capmkt:UpdateForTheEvent contextRef="OneD">Acquisition (including agreement to acquire)</in-capmkt:UpdateForTheEvent><in-capmkt:BriefDetailsOfInitialAnnouncement contextRef="OneI">Vide our earlier disclosure dated 2nd July 2026 it was informed that the Board of Directors of the Company approved the acquisition of the balance 51 percent equity stake in the Flow Tech Chemicals Private Limited and to make it a wholly owned subsidiary of the Company subject to the approval of the Members which was further approved by the members through Postal Ballot on 5th August 2026</in-capmkt:BriefDetailsOfInitialAnnouncement><in-capmkt:ReasonForUpdate contextRef="OneD">Transaction Completed</in-capmkt:ReasonForUpdate><in-capmkt:TransactionCompleted contextRef="OneI">Executed a 2nd Supplementary Share Purchase Agreement and acquired the balance 51 percent equity stake in Flow Tech Chemicals Private Limited and consequent upon the said acquisition now Flow Tech has become a wholly owned subsidiary of the Company</in-capmkt:TransactionCompleted><in-capmkt:AmountOfTransactionCompleted contextRef="OneD" unitRef="INR" decimals="-5">551600000</in-capmkt:AmountOfTransactionCompleted><in-capmkt:DateOfTransactionCompleted contextRef="OneI">2026-09-16</in-capmkt:DateOfTransactionCompleted><in-capmkt:PercentageOfTransactionCompleted contextRef="OneI" unitRef="pure" decimals="INF">1</in-capmkt:PercentageOfTransactionCompleted></xbrli:xbrl>
