<?xml version="1.0" encoding="UTF-8" standalone="no"?><!--IFFIndAs--><xbrli:xbrl xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:in-capmkt="http://www.sebi.gov.in/xbrl/2025-01-31/in-capmkt" xmlns:in-capmkt-ent="http://www.sebi.gov.in/xbrl/IntegratedFinance_IndAS/2025-01-31/in-capmkt/in-capmkt-ent" xmlns:in-capmkt-roles="http://www.sebi.gov.in/xbrl/IntegratedFinance_IndAS/2025-01-31/in-capmkt-roles" xmlns:in-capmkt-types="http://www.sebi.gov.in/xbrl/2025-01-31/in-capmkt-types" xmlns:iso4217="http://www.xbrl.org/2003/iso4217" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:negated="http://www.xbrl.org/2009/role/negated" xmlns:net="http://www.xbrl.org/2009/role/net" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:xlink="http://www.w3.org/1999/xlink"><link:schemaRef xlink:href="in-capmkt-ent-2025-01-31.xsd" xlink:type="simple"/><xbrli:context id="OneD"><xbrli:entity><xbrli:identifier scheme="http://www.bseindia.com/in-capmkt/ScripCode">543318</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2025-04-01</xbrli:startDate><xbrli:endDate>2025-06-30</xbrli:endDate></xbrli:period></xbrli:context><xbrli:context id="OneExpenses1D"><xbrli:entity><xbrli:identifier scheme="http://www.bseindia.com/in-capmkt/ScripCode">543318</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2025-04-01</xbrli:startDate><xbrli:endDate>2025-06-30</xbrli:endDate></xbrli:period><xbrli:scenario><xbrldi:explicitMember dimension="in-capmkt:DetailsOfOtherExpensesAxis">in-capmkt:OtherExpenses1Member</xbrldi:explicitMember></xbrli:scenario></xbrli:context><xbrli:context id="D_ItemsThatWillNotBeReclassifiedToProfitAndLoss11"><xbrli:entity><xbrli:identifier scheme="http://www.bseindia.com/in-capmkt/ScripCode">543318</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2025-04-01</xbrli:startDate><xbrli:endDate>2025-06-30</xbrli:endDate></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:ItemsThatWillNotBeReclassifiedToProfitAndLossAxis"><in-capmkt:ItemsThatWillNotBeReclassifiedToProfitAndLossDomain>ItemsThatWillNotBeReclassifiedToProfitAndLoss1</in-capmkt:ItemsThatWillNotBeReclassifiedToProfitAndLossDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:unit id="INR"><xbrli:measure>iso4217:INR</xbrli:measure></xbrli:unit><xbrli:unit id="INRPerShare"><xbrli:divide><xbrli:unitNumerator><xbrli:measure>iso4217:INR</xbrli:measure></xbrli:unitNumerator><xbrli:unitDenominator><xbrli:measure>xbrli:shares</xbrli:measure></xbrli:unitDenominator></xbrli:divide></xbrli:unit><in-capmkt:ScripCode contextRef="OneD">543318</in-capmkt:ScripCode><in-capmkt:Symbol contextRef="OneD">CLEAN</in-capmkt:Symbol><in-capmkt:MSEISymbol contextRef="OneD">NOTLISTED</in-capmkt:MSEISymbol><in-capmkt:ISIN contextRef="OneD">INE227W01023</in-capmkt:ISIN><in-capmkt:NameOfTheCompany contextRef="OneD">CLEAN SCIENCE AND TECHNOLOGY LIMITED</in-capmkt:NameOfTheCompany><in-capmkt:TypeOfCompany contextRef="OneD">Main Board</in-capmkt:TypeOfCompany><in-capmkt:ClassOfSecurity contextRef="OneD">Equity</in-capmkt:ClassOfSecurity><in-capmkt:DateOfStartOfFinancialYear contextRef="OneD">2025-04-01</in-capmkt:DateOfStartOfFinancialYear><in-capmkt:DateOfEndOfFinancialYear contextRef="OneD">2026-03-31</in-capmkt:DateOfEndOfFinancialYear><in-capmkt:DateOfBoardMeetingWhenFinancialResultsWereApproved contextRef="OneD">2025-07-17</in-capmkt:DateOfBoardMeetingWhenFinancialResultsWereApproved><in-capmkt:DateOnWhichPriorIntimationOfTheMeetingForConsideringFinancialResultsWasInformedToTheExchange contextRef="OneD">2025-07-08</in-capmkt:DateOnWhichPriorIntimationOfTheMeetingForConsideringFinancialResultsWasInformedToTheExchange><in-capmkt:DescriptionOfPresentationCurrency contextRef="OneD">INR</in-capmkt:DescriptionOfPresentationCurrency><in-capmkt:LevelOfRounding contextRef="OneD">Millions</in-capmkt:LevelOfRounding><in-capmkt:TypeOfReportingPeriod contextRef="OneD">Quarterly</in-capmkt:TypeOfReportingPeriod><in-capmkt:ReportingQuarter contextRef="OneD">First quarter</in-capmkt:ReportingQuarter><in-capmkt:IsCompanyReportingMultisegmentOrSingleSegment contextRef="OneD">Single segment</in-capmkt:IsCompanyReportingMultisegmentOrSingleSegment><in-capmkt:DescriptionOfSingleSegment contextRef="OneD">Organic Chemicals</in-capmkt:DescriptionOfSingleSegment><in-capmkt:DateOfStartOfBoardMeeting contextRef="OneD">2025-07-17</in-capmkt:DateOfStartOfBoardMeeting><in-capmkt:StartTimeOfBoardMeeting contextRef="OneD">15:00:00</in-capmkt:StartTimeOfBoardMeeting><in-capmkt:DateOfEndOfBoardMeeting contextRef="OneD">2025-07-17</in-capmkt:DateOfEndOfBoardMeeting><in-capmkt:EndTimeOfBoardMeeting contextRef="OneD">15:35:00</in-capmkt:EndTimeOfBoardMeeting><in-capmkt:DeclarationOfUnmodifiedOpinionOrStatementOnImpactOfAuditQualification contextRef="OneD">Not applicable</in-capmkt:DeclarationOfUnmodifiedOpinionOrStatementOnImpactOfAuditQualification><in-capmkt:DateOfStartOfReportingPeriod contextRef="OneD">2025-04-01</in-capmkt:DateOfStartOfReportingPeriod><in-capmkt:DateOfEndOfReportingPeriod contextRef="OneD">2025-06-30</in-capmkt:DateOfEndOfReportingPeriod><in-capmkt:WhetherResultsAreAuditedOrUnaudited contextRef="OneD">Unaudited</in-capmkt:WhetherResultsAreAuditedOrUnaudited><in-capmkt:NatureOfReportStandaloneConsolidated contextRef="OneD">Consolidated</in-capmkt:NatureOfReportStandaloneConsolidated><in-capmkt:RevenueFromOperations contextRef="OneD" decimals="-4" unitRef="INR">2428690000</in-capmkt:RevenueFromOperations><in-capmkt:OtherIncome contextRef="OneD" decimals="-4" unitRef="INR">134260000</in-capmkt:OtherIncome><in-capmkt:Income contextRef="OneD" decimals="-4" unitRef="INR">2562950000</in-capmkt:Income><in-capmkt:CostOfMaterialsConsumed contextRef="OneD" decimals="-4" unitRef="INR">930720000</in-capmkt:CostOfMaterialsConsumed><in-capmkt:PurchasesOfStockInTrade contextRef="OneD" decimals="-6" unitRef="INR">0</in-capmkt:PurchasesOfStockInTrade><in-capmkt:ChangesInInventoriesOfFinishedGoodsWorkInProgressAndStockInTrade contextRef="OneD" decimals="-4" unitRef="INR">-92190000</in-capmkt:ChangesInInventoriesOfFinishedGoodsWorkInProgressAndStockInTrade><in-capmkt:EmployeeBenefitExpense contextRef="OneD" decimals="-4" unitRef="INR">152110000</in-capmkt:EmployeeBenefitExpense><in-capmkt:FinanceCosts contextRef="OneD" decimals="-5" unitRef="INR">700000</in-capmkt:FinanceCosts><in-capmkt:DepreciationDepletionAndAmortisationExpense contextRef="OneD" decimals="-4" unitRef="INR">186580000</in-capmkt:DepreciationDepletionAndAmortisationExpense><in-capmkt:OtherExpenses contextRef="OneD" decimals="-4" unitRef="INR">439540000</in-capmkt:OtherExpenses><in-capmkt:Expenses contextRef="OneD" decimals="-4" unitRef="INR">1617460000</in-capmkt:Expenses><in-capmkt:ProfitBeforeExceptionalItemsAndTax contextRef="OneD" decimals="-4" unitRef="INR">945490000</in-capmkt:ProfitBeforeExceptionalItemsAndTax><in-capmkt:ExceptionalItemsBeforeTax contextRef="OneD" decimals="-6" unitRef="INR">0</in-capmkt:ExceptionalItemsBeforeTax><in-capmkt:ProfitBeforeTax contextRef="OneD" decimals="-4" unitRef="INR">945490000</in-capmkt:ProfitBeforeTax><in-capmkt:CurrentTax contextRef="OneD" decimals="-5" unitRef="INR">249300000</in-capmkt:CurrentTax><in-capmkt:DeferredTax contextRef="OneD" decimals="-4" unitRef="INR">-4440000</in-capmkt:DeferredTax><in-capmkt:TaxExpense contextRef="OneD" decimals="-4" unitRef="INR">244860000</in-capmkt:TaxExpense><in-capmkt:NetMovementInRegulatoryDeferralAccountBalancesRelatedToProfitOrLossAndTheRelatedDeferredTaxMovement contextRef="OneD" decimals="-6" unitRef="INR">0</in-capmkt:NetMovementInRegulatoryDeferralAccountBalancesRelatedToProfitOrLossAndTheRelatedDeferredTaxMovement><in-capmkt:ProfitLossForPeriodFromContinuingOperations contextRef="OneD" decimals="-4" unitRef="INR">700630000</in-capmkt:ProfitLossForPeriodFromContinuingOperations><in-capmkt:ProfitLossFromDiscontinuedOperationsBeforeTax contextRef="OneD" decimals="-6" unitRef="INR">0</in-capmkt:ProfitLossFromDiscontinuedOperationsBeforeTax><in-capmkt:TaxExpenseOfDiscontinuedOperations contextRef="OneD" decimals="-6" unitRef="INR">0</in-capmkt:TaxExpenseOfDiscontinuedOperations><in-capmkt:ProfitLossFromDiscontinuedOperationsAfterTax contextRef="OneD" decimals="-6" unitRef="INR">0</in-capmkt:ProfitLossFromDiscontinuedOperationsAfterTax><in-capmkt:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod contextRef="OneD" decimals="-6" unitRef="INR">0</in-capmkt:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod><in-capmkt:ProfitLossForPeriod contextRef="OneD" decimals="-4" unitRef="INR">700630000</in-capmkt:ProfitLossForPeriod><in-capmkt:OtherComprehensiveIncomeNetOfTaxes contextRef="OneD" decimals="-5" unitRef="INR">200000</in-capmkt:OtherComprehensiveIncomeNetOfTaxes><in-capmkt:ComprehensiveIncomeForThePeriod contextRef="OneD" decimals="-4" unitRef="INR">700830000</in-capmkt:ComprehensiveIncomeForThePeriod><in-capmkt:ProfitOrLossAttributableToOwnersOfParent contextRef="OneD" decimals="-4" unitRef="INR">700830000</in-capmkt:ProfitOrLossAttributableToOwnersOfParent><in-capmkt:ProfitOrLossAttributableToNonControllingInterests contextRef="OneD" decimals="-6" unitRef="INR">0</in-capmkt:ProfitOrLossAttributableToNonControllingInterests><in-capmkt:ComprehensiveIncomeForThePeriodAttributableToOwnersOfParent contextRef="OneD" decimals="-4" unitRef="INR">700830000</in-capmkt:ComprehensiveIncomeForThePeriodAttributableToOwnersOfParent><in-capmkt:ComprehensiveIncomeForThePeriodAttributableToOwnersOfParentNonControllingInterests contextRef="OneD" decimals="-6" unitRef="INR">0</in-capmkt:ComprehensiveIncomeForThePeriodAttributableToOwnersOfParentNonControllingInterests><in-capmkt:PaidUpValueOfEquityShareCapital contextRef="OneD" decimals="-6" unitRef="INR">106267259000000</in-capmkt:PaidUpValueOfEquityShareCapital><in-capmkt:FaceValueOfEquityShareCapital contextRef="OneD" decimals="INF" unitRef="INRPerShare">1</in-capmkt:FaceValueOfEquityShareCapital><in-capmkt:BasicEarningsLossPerShareFromContinuingOperations contextRef="OneD" decimals="INF" unitRef="INRPerShare">6.59</in-capmkt:BasicEarningsLossPerShareFromContinuingOperations><in-capmkt:DilutedEarningsLossPerShareFromContinuingOperations contextRef="OneD" decimals="INF" unitRef="INRPerShare">6.59</in-capmkt:DilutedEarningsLossPerShareFromContinuingOperations><in-capmkt:BasicEarningsLossPerShareFromDiscontinuedOperations contextRef="OneD" decimals="INF" unitRef="INRPerShare">0</in-capmkt:BasicEarningsLossPerShareFromDiscontinuedOperations><in-capmkt:DilutedEarningsLossPerShareFromDiscontinuedOperations contextRef="OneD" decimals="INF" unitRef="INRPerShare">0</in-capmkt:DilutedEarningsLossPerShareFromDiscontinuedOperations><in-capmkt:BasicEarningsLossPerShareFromContinuingAndDiscontinuedOperations contextRef="OneD" decimals="INF" unitRef="INRPerShare">6.59</in-capmkt:BasicEarningsLossPerShareFromContinuingAndDiscontinuedOperations><in-capmkt:DilutedEarningsLossPerShareFromContinuingAndDiscontinuedOperations contextRef="OneD" decimals="INF" unitRef="INRPerShare">6.59</in-capmkt:DilutedEarningsLossPerShareFromContinuingAndDiscontinuedOperations><in-capmkt:DisclosureOfNotesOnFinancialResultsExplanatoryTextBlock contextRef="OneD">1. The Statement has been prepared in accordance with the recognition and measurement principles laid down in Indian Accounting Standard 34 Interim Financial Reporting Ind AS 34 prescribed under Section 133 of the Companies Act , 2013 read with Companies Indian Accounting Standards Rules, 2015 as amended from time to time and the provisions of the Companies Act, 2013 and other accounting principles. &lt;BR&gt; 
 				  &lt;BR&gt; 
2. The above results have been subjected to Limited Review by the statutory auditors of the Company in terms of Regulation 33 of the Securities and Exchange Board of India Listing Obligations and Disclosure Requirements Regulations, 2015, as amended and have been reviewed by the Audit Committee and thereafter approved and taken on record by the Board of Directors at its meeting held on July 17, 2025.				 &lt;BR&gt; 
 &lt;BR&gt; 
3. Standalone information	 	 	 	  &lt;BR&gt; 
 &lt;BR&gt; 
Particulars	                          Quarter Ended	                                    	 &lt;BR&gt; 
 	                                          June 30, 2025      &lt;BR&gt; 
                                                            Unaudited            &lt;BR&gt; 
a.  Revenue	                                2,199.06         &lt;BR&gt; 
b.  Profit before tax                                1,024.15          &lt;BR&gt; 
c.  Profit for the period or year                  765.74               &lt;BR&gt; 
d.  Other comprehensive loss or income       0.03                  &lt;BR&gt; 
e.  Total comprehensive income                765.77              &lt;BR&gt; 
 	 	 	  &lt;BR&gt; 
4. The Group is exclusively engaged in the business of manufacturing of organic chemicals. This in the context of the Ind AS 108 Operating Segments, is considered to constitute one single primary segment. &lt;BR&gt; 
 				  &lt;BR&gt; 
5. The figures for the quarter ended March 31, 2025 as reported in these financial results, are the balancing figures between the audited figures for the year ended March 31, 2025 and unaudited figures for the nine months ended December 31, 2024 which were subjected to limited review.	 &lt;BR&gt; 
  &lt;BR&gt; 
6. The consolidated results of the Group are available on the Companys website, www.cleanscience.co.in and also on the website of the BSE Limited, www.bseindia.com and National Stock Exchange of India Limited, www.nseindia.com, where the shares of the Company are listed.</in-capmkt:DisclosureOfNotesOnFinancialResultsExplanatoryTextBlock><in-capmkt:DescriptionOfOtherExpenses contextRef="OneExpenses1D">Other expenses</in-capmkt:DescriptionOfOtherExpenses><in-capmkt:OtherExpenses contextRef="OneExpenses1D" decimals="-4" unitRef="INR">439540000</in-capmkt:OtherExpenses><in-capmkt:DescriptionOfItemThatWillNotBeReclassifiedToProfitAndLoss contextRef="D_ItemsThatWillNotBeReclassifiedToProfitAndLoss11">Remeasurements of post employment benefit obligations.</in-capmkt:DescriptionOfItemThatWillNotBeReclassifiedToProfitAndLoss><in-capmkt:AmountOfItemThatWillNotBeReclassifiedToProfitAndLoss contextRef="D_ItemsThatWillNotBeReclassifiedToProfitAndLoss11" decimals="-4" unitRef="INR">240000</in-capmkt:AmountOfItemThatWillNotBeReclassifiedToProfitAndLoss><in-capmkt:AmountOfItemThatWillNotBeReclassifiedToProfitAndLoss contextRef="OneD" decimals="-4" unitRef="INR">240000</in-capmkt:AmountOfItemThatWillNotBeReclassifiedToProfitAndLoss><in-capmkt:IncomeTaxRelatingToItemsThatWillNotBeReclassifiedToProfitOrLoss contextRef="OneD" decimals="-4" unitRef="INR">40000</in-capmkt:IncomeTaxRelatingToItemsThatWillNotBeReclassifiedToProfitOrLoss><in-capmkt:OtherComprehensiveIncome contextRef="OneD" decimals="-5" unitRef="INR">200000</in-capmkt:OtherComprehensiveIncome></xbrli:xbrl>