Limited Assurance Report for Integrated Report 2024-25

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Assurance report on select sustainability disclosures in the Integrated Annual Report prepared in accordance with the Business Responsibility and Sustainability Reporting ('BRSR') framework and with reference to the Global Reporting Initiative ('GRI') Standards 2021 (together called 'Identified Sustainability Information' (ISI) of Tata Chemicals Limited ('the Company') for the period from 1 April 2024 to 31 March 2025.

We have performed an assurance engagement on the Identified Sustainability Information ('ISI') as detailed in the table below:

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

Based on the procedures performed and evidence obtained, nothing has come to our attention to causes us to believe that the Company's Identified Sustainability Information on 3 to 100 of the Integrated Annual Report relating to select disclosures in GRI Standards and BRSR attributes (which are not part of BRSR Core) for the year ended 31 March 2025, is not prepared, in all material respects, in accordance with GRI Standards (2021) and basis of preparation set out in Section A: General Disclosures 13 of "Business Responsibility and Sustainability Report" of the 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 and ISAE 3410, Assurance Engagements on Greenhouse Gas Statements, 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 conclusion.

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 select BRSR attributes and disclosures in GRI Standards assurance report thereon).

Additionally, we have performed a reasonable assurance engagement on BRSR Core attributes and issued an independent assurance report on 04 June 2025. Our report thereon is included with the other information.

Our limited assurance conclusion on the select disclosures in GRI Standards and BRSR 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 select disclosures in GRI Standards and BRSR attributes, our responsibility is to read the other information and, in doing so, consider whether the other information is materially inconsistent with the select disclosures in GRI Standards and BRSR 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.

The ISI and our limited assurance report are intended for users who have reasonable knowledge of the disclosures in GRI Standards and BRSR 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 are responsible for:

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

• selecting or developing suitable criteria for preparing the Identified Sustainability Information and appropriately referring to or describing the criteria; and

• preparing, fairly stating and properly calculating the Identified Sustainability Information in accordance with the reporting criteria.

• 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;

• 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 ISI 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

  Those charged with governance are responsible for overseeing the reporting process for the Company's ISI.

  Inherent limitations

  The preparation of the Company's sustainability 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 and disclosures in GRI Standards and BRSR 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 a limited assurance about whether the ISI is free from material misstatement, whether due to fraud or error;

• forming an independent conclusion, based on the procedures we have performed and the evidence we have obtained; and

• reporting our conclusion to Directors of Tata Chemicals Limited.

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

  We exercised professional judgement 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 limited assurance conclusion.

  Our procedures selected depended on our understanding of the information covered by limited assurance and other engagement circumstances, and our consideration of areas where material misstatements are likely to arise. In carrying out our engagement, we:

• assessed the suitability of the criteria used by the Company in preparing the information covered by limited assurance;

• interviewed senior management and relevant staff at corporate and selected locations concerning policies for occupational health and safety, and the implementation of these across the business;

• through inquiries, obtained an understanding of the Company's control environment, processes and information systems relevant to the preparation of the information covered by limited assurance, but did not evaluate the design of particular control activities, obtain evidence about their implementation or test their operating effectiveness;

• made inquiries of relevant staff at corporate and selected locations responsible for the preparation of the Information covered by limited assurance;

• applied analytical procedures, as appropriate;

• recalculated the ISI covered by limited assurance based on the criteria; and

• evaluated the overall presentation of the ISI covered by limited assurance to determine whether it is consistent with the criteria and in line with our overall knowledge of, and experience with, the Company's systems and processes.

The procedures performed in a limited assurance engagement vary in nature and timing from, and are less in extent than for, a reasonable assurance engagement. Consequently, the level of assurance obtained in a limited assurance engagement is substantially lower than the assurance that would have been obtained had a reasonable assurance engagement been performed.

Our assurance scope excludes the following and therefore we will not express a conclusion 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 judgments 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 GRI attributes and the data/information (qualitative or quantitative) other than the ISI.

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

Partner

Date: 04 June 2025 Place: Kolkata