<?xml version="1.0" encoding="UTF-8"?>
<!--REG30PARAB V1.0 (01-06-2026)-->
<xbrli:xbrl xmlns:in-capmkt="http://www.sebi.gov.in/xbrl/2026-04-30/in-capmkt" xmlns:in-capmkt-ent="http://www.sebi.gov.in/xbrl/Regulation_30_Para_B_Of_Part_A_Of_Schedule_III/2026-04-30/in-capmkt/in-capmkt-ent" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:in-capmkt-types="http://www.sebi.gov.in/xbrl/2026-04-30/in-capmkt-types" 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.w3.org/1999/xlink"><link:schemaRef xlink:type="simple" xlink:href="in-capmkt-ent-2026-04-30.xsd"/><xbrli:context id="MainI"><xbrli:entity><xbrli:identifier scheme="http://www.sebi.gov.in/in-capmkt/ScripCode">543336</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-09-26</xbrli:instant></xbrli:period></xbrli:context><in-capmkt:NSESymbol contextRef="MainI">CHEMPLASTS</in-capmkt:NSESymbol><in-capmkt:NameOfTheCompany contextRef="MainI">CHEMPLAST SANMAR LIMITED</in-capmkt:NameOfTheCompany><in-capmkt:ScripCode contextRef="MainI">543336</in-capmkt:ScripCode><in-capmkt:MSEISymbol contextRef="MainI">NOTLISTED</in-capmkt:MSEISymbol><in-capmkt:ISIN contextRef="MainI">INE488A01050</in-capmkt:ISIN><in-capmkt:TypeOfEventAsPerRegulation30ParaBOfPartAOfScheduleIII contextRef="MainI">Disruption of operations (Sub-para 6-Para B)</in-capmkt:TypeOfEventAsPerRegulation30ParaBOfPartAOfScheduleIII><in-capmkt:TypeOfAnnouncementAsPerRegulation30ParaBOfPartAOfScheduleIII contextRef="MainI">New</in-capmkt:TypeOfAnnouncementAsPerRegulation30ParaBOfPartAOfScheduleIII><in-capmkt:WhetherEventOrInformationDisclosedIsAnOutcomeOfTheBoardMeeting contextRef="MainI">false</in-capmkt:WhetherEventOrInformationDisclosedIsAnOutcomeOfTheBoardMeeting><in-capmkt:DateOfOccurrenceOfEventOrInformation contextRef="MainI">2026-09-25</in-capmkt:DateOfOccurrenceOfEventOrInformation><in-capmkt:TimeOfOccurrenceOfEventOrInformation contextRef="MainI">12:54:00</in-capmkt:TimeOfOccurrenceOfEventOrInformation><in-capmkt:DateOfReport contextRef="MainI">2026-09-26</in-capmkt:DateOfReport><in-capmkt:StageAtWhichDisruptionOfOperationsDisclosureIsProvided contextRef="MainI">Regularly, till complete normalcy is restored</in-capmkt:StageAtWhichDisruptionOfOperationsDisclosureIsProvided><in-capmkt:TypeOfDisruption contextRef="MainI">Fire</in-capmkt:TypeOfDisruption><in-capmkt:InsuranceAmountClaimedAndRealizedByTheListedEntityForTheLossOrDamage contextRef="MainI">Insurance claim has been intimated, and the loss assessment is under progress.</in-capmkt:InsuranceAmountClaimedAndRealizedByTheListedEntityForTheLossOrDamage><in-capmkt:ActualAmountOfDamageCausedDueToNaturalCalamityOrOtherForceMajeureEvents contextRef="MainI">The Plant &amp; Machinery damage is estimated to be Rs. 5 Crores</in-capmkt:ActualAmountOfDamageCausedDueToNaturalCalamityOrOtherForceMajeureEvents><in-capmkt:DetailsOfStepsTakenToRestoreNormalcyAndImpactOfTheNaturalCalamityOrOtherForceMajeureEventsOnProductionOrService contextRef="MainI">A detailed Root Cause Analysis (RCA) and HAZOP study were carried out to identify the causes of the incident and to determine the necessary corrective and preventive measures. Based on the recommendations arising from this study, the Company has carried out the corrective and preventive measures. We will quantify the impact and present when the final revocation order is received from the concerned authorities.</in-capmkt:DetailsOfStepsTakenToRestoreNormalcyAndImpactOfTheNaturalCalamityOrOtherForceMajeureEventsOnProductionOrService></xbrli:xbrl>