Reasonable Assurance Report for BRSR 2024-25

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Assurance report on the sustainability disclosures in the Business Responsibility and Sustainability Reporting ('BRSR') Core Format 1 (called 'Identified Sustainability Information' ('ISI') of Tata Chemicals Limited (the 'Company'). The ISI is included in the Business Responsibility and Sustainability Reporting section of Integrated Annual Report of the Company for the period from 1 April 2024 to 31 March 2025.

We have performed a reasonable assurance engagement on whether the Company's sustainability disclosures in the BRSR Core Format (refer to Annexure 1) for the period from 1 April 2024 to 31 March 2025 have been prepared in accordance with the reporting criteria (refer table below).

This engagement was conducted by a multidisciplinary team including assurance practitioners, engineers and environmental and social professionals.

‌1 Notified by SEBI vide circular number SEBI/HO/CFD/CFD-SEC-2/P/CIR/2023/122 dated 12 July 2023

In our opinion, the Company's Identified Sustainability Information on pages 56 to 100 of the Annual Report for the period 1 April 2024 to 31 March 2025, is prepared, in all material respects, in accordance with the Regulation 34(2)(f) of the Securities and Exchange Board of India (SEBI) Listing Obligations and Disclosure Requirements (SEBI LODR) and basis of preparation set out in Section A: General Disclosures 13 of "Business Responsibility and Sustainability Report" of Integrated Annual Report

We conducted our engagement in accordance with International Standard on Assurance Engagements ('ISAE') 3000 (Revised), Assurance Engagements Other Than Audits or Reviews of Historical Financial Information issued by the International Auditing and Assurance Standards Board ('IAASB'). Our responsibilities under those standards are further described in the "Our responsibilities" section of our report.

We have complied with the independence and other ethical requirements of the International Code of Ethics for Professional Accountants (including International Independence Standards) issued by the International Ethics Standards Board for Accountants ('IESBA').

KPMG Assurance and Consulting Services LLP ("the Firm") applies International Standard on Quality Management (ISQM) 1, Quality Management for Firms that Perform Audits or Reviews of Financial Statements, or Other Assurance or Related Services Engagements, issued by the IAASB. This standard requires the firm to design, implement and operate a system of quality management, including policies or procedures regarding compliance with ethical requirements, professional standards and applicable legal and regulatory requirements.

We believe that the evidence we have obtained is sufficient and appropriate to provide a basis for our opinion.

The Company's management and the Board of Directors are responsible for the other information. The other information comprises the information included in the Company's Integrated Annual Report (but does not include the BRSR Core attributes and assurance report thereon).

Additionally, we have performed a limited assurance engagement on select disclosures of GRI Standards and BRSR attributes, and issued an independent assurance report on 04 June 2025. Our report thereon is included with the other information.

Our reasonable assurance opinion on the BRSR Core attributes does not cover the other information and we do not express any form of assurance conclusion thereon.

In connection with our assurance report of the BRSR Core attributes, our responsibility is to read the other information and, in doing so, consider whether the other information is materially inconsistent with the BRSR Core attributes, our knowledge obtained in the assurance, or otherwise appears to be materially misstated. If, based on the work we have performed on the other information that we obtained prior to the date of this reasonable assurance report, we conclude that there is a material misstatement of this other information, we are required to report that fact. We have nothing to report in this regard.

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The ISI and our reasonable assurance report are intended for users who have reasonable knowledge of the BRSR Core attributes, the reporting criteria and ISI and who have read the information in the ISI with reasonable diligence and understand that the ISI is prepared and assured at appropriate levels of materiality.

Our opinion is not modified in respect of this matter.

The management of the Company acknowledge and understand their responsibility for:

• designing, implementing and maintaining internal controls relevant to the preparation of the ISI that is free from material misstatement, whether due to fraud or error;

• selecting or establishing suitable criteria for preparing the ISI, taking into account applicable laws and regulations, if any, related to reporting on the ISI, identification of key aspects, engagement with stakeholders, content, preparation and presentation of the ISI in accordance with the reporting criteria; disclosure of the applicable criteria used for preparation of the ISI in the relevant report/statement;

• preparing, fairly stating and properly calculating the ISI in accordance with the reporting criteria; and

• ensuring the reporting criteria is available for the intended users with relevant explanation;

• establishing targets, goals and other performance measures, and implementing actions to achieve such targets, goals and performance measures;

• responsible for providing the details of the management personnel who takes ownership of the ISI disclosed in the report;

• ensuring compliance with law, regulation or applicable contracts;

• making judgements and estimates that are reasonable in the circumstances;

• identifying and describing any inherent limitations in the measurement or evaluation of information covered by assurance in accordance with the reporting criteria;

• preventing and detecting fraud;

• selecting the content of the ISI, including identifying and engaging with intended users to understand their information needs;

• informing us of other information that will be included with the ISI;

• supervision of other staff involved in the preparation of the ISI.

  The Board of Directors are responsible for overseeing the reporting process for the Company's ISI.

  Inherent limitations

  The preparation of the Company's BRSR information requires the management to establish or interpret the criteria, make determinations about the relevance of information to be included, and make estimates and assumptions that affect the reported information.

  Measurement of certain amounts with respect to the BRSR Core attributes, some of which are estimates, is subject to substantial inherent measurement uncertainty, for example, GHG footprint, water footprint, energy footprint. Obtaining sufficient appropriate evidence to support our opinion does not reduce the uncertainty in the amounts and metrics.

  Our responsibilities

  We are responsible for:

• Planning and performing the engagement to obtain reasonable assurance on the sustainability disclosures in the BRSR Core are free from material misstatement, whether due to fraud or error, in accordance with the Reporting Criteria in line with the section above.

• Forming an independent opinion, based on the procedures we have performed and the evidence we have obtained, and

• Reporting our reasonable assurance opinion to the Directors of Tata Chemicals Limited.

  Summary of the work we performed as the basis for our opinion

  We exercised professional judgment and maintained professional skepticism throughout the engagement. We designed and performed our procedures to obtain evidence that is sufficient and appropriate to provide a basis for our reasonable assurance opinion.

  The nature, timing, and extent of the procedures selected depended on our judgement, including an assessment of the risks of material misstatement of the information covered by reasonable assurance, whether due to fraud or error. We identified and assessed the risks of material misstatement through understanding the ISI covered by reasonable assurance and the engagement circumstances. We also obtained an understanding of the internal control relevant to the ISI covered by reasonable assurance in order to design procedures that are appropriate in the circumstances but not for the purpose of expressing an opinion on the effectiveness of internal controls. In carrying out our engagement, we:

• assessed the suitability of the criteria used by the Company in preparing the reasonable assurance ISI;

• evaluated the appropriateness of reporting policies, quantification methods and models used in the preparation of the ISI covered by reasonable assurance and the reasonableness of estimates made by the Company; and

• evaluated the overall presentation of the ISI covered by reasonable assurance.

  Exclusions

  Our assurance scope excludes the following and therefore we will not express an opinion on the same:

  • Any form of review of the commercial merits, technical feasibility, accuracy, compliance with applicable legislation for the project, and accordingly we will express no opinion thereon. We will also not be required to verify any of the judgements and commercial risks associated with the project, nor comment upon the possibility of the financial projections being achieved.

  • The Company's statements that describe the strategy, progress on goals (other than those listed under the scope of assurance), expression of opinion, claims, belief, aspiration, expectation, aim to future intention provided by the Company, and assertions related to Intellectual Property Rights and other competitive issues.

  • Operations of the Company other than those mentioned in the "Scope of Assurance".

  • Aspects of the BRSR and the data/information (qualitative or quantitative) other than the ISI.

  • Data and information outside the defined reporting period i.e., from 1 April 2024 to 31 March 2025.

Partner

Date: 04 June 2025 Place: Kolkata