General Updates

INDO BORAX & CHEMICALS LTD. Regd. Office: 506, 5th Floor, Tulsiani Chambers, Free Press Journal Marg, Nariman Point, Mumbai - 400021, India. Ph.: 022 35218591 • CIN: L24100MH1980PLC023177 Email : info@indoborax.com • Website : www.indoborax.com Date: October 22, 2026 BSE Limited National Stock Exchange of India The Corporate Relations Department, Limited 25 1h Floor, Phiroze Jeejeebhoy Towers, Exchange Plaza, Bandra-Kurla Complex, Dalal Street, Sandra (East), Mumbai 400 051 Mumbai - 400 001 Stock Code - INDOBORAX Stock Code - 524342 Subject: Disclosure under Regulation 30 read with Schedule Ill of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 ("Listing Regulations") and SEBI Master Circular no. H0/49/14/14(7)2025-CFD-POD2/l/3762/2026 dated January 30, 2026 ("SEBI Master Circular") - Amendment of the Share Purchase Agreement Dear Sir/ Madam, Jn continuation of our earlier intimation dated August 20, 2026 and September 29, 2026 and pursuant to Regulation 30 and other applicable regulations of the SEBI LODR Regulations, we hereby inform you that lndo Borax and Chemicals Limited ("Purchaser") has executed an amendment agreement dated October 22, 2026 ("Amendment Agreement") with Mr. Ketan Vinodchandra Ramani, Mr. Pritesh Vinodchandra Ramani, Mr. Jogindersingh Gianchand Jaswal (together, the "Sellers") and Zenrock Chemicals Private Limited, to amend the share purchase agreement dated August 20, 2026 ("SPA"). Pursuant to the Amendment Agreement, the Sellers' aggregate shareholding of 9.95% in the share capital of Kronox Lab Sciences Limited ("Target Company") is no longer subject to any lock-in restrictions and the Purchaser ceases to hold a right of first refusal in respect of the Sellers' retained shareholding. Details as required under SEBI LODR Regulations read with the SEBI Master Circular are enclosed herewith as the Annexure I. We request you to take this information on record. Thanking you, Yours faithfully, For Iodo Borax & Chemicals Limited Pravin Chavan Company Secretary & Compliance Officer Annexure I Disclosure under Regulations 30 read with sub- paragraph 5 of Para A of Part A of Schedule II I of the SEBI LODR Regulations read with the SEBI Master Circular Sr. Particulars Details I. Name(s) of parties with whom the Jndo Borax & Chemicals Limited ("Purchaser"), agreement is entered. Mr. Ketan Vinodchandra Ramani, Mr. Pritesh Vi nodchandra Ramani, Mr. Jogindersingh Gianchand Jaswal (together, the "Sellers"), and Zenrock Chemicals Private Limited ("ZCPL"). 2. Purpose of entering into the Please refer to the details given in Sr. No. 9. agreement .... . Shareholding, if any, in the entity Not applicable, as the Purchaser does not have any with whom the agreement is shareholding in any of the parties to the Amendment executed Agreement. 4. Significant terms of the agreement The Amendment Agreement deletes Clause 9.5 (in brief) special rights like right to (Lock-in on Sellers' Shareholding) and Clause 9.6 appoint directors, first right to share (Right of First Refusal) of the SPA in their entirety, subscription in case of issuance of such that the Sellers' shares will no longer be subject shares, right to restrict any change in to any lock-in and the Purchaser will no longer hold capital structure, etc. a right of first refusal over the Sellers' retained shareholding. 5. Whether, the said parties are related The Sellers are the erstwhile promoters of the Target to promoter/promoter group/ group Company. companies in any manner. If yes, nature of relationship On and from September 29, 2026, the Purchaser has become the promoter and ZCPL has become a member of the promoter group of the Target Company. 6. Whether the transaction would fall The Amendment Agreement does not constitute a within related party transactions? If related party transaction. yes, whether the same is done at "arm's length" 7. In case of issuance of shares to the Not applicable. parties, details ofissue price, class of shares issued 8. Any other disclosures related to such Not applicable. agreements, viz., details of nominee on the board of directors of the listed entity, potential conflict of interest arising out of such agreements, etc. 9. In case oftennination or amendment (a) The Purchaser, Sellers and ZCPL. of agreement, listed entity shal I disclose additional details to the (b) The Amendment Agreement is an amendment to stock exchange(s): the share purchase agreement dated August 20, 2026 ("SPA"), entered into between the (a) name of parties to the Purchaser, the Sellers and ZCPL. agreement; (c) The Amendment Agreement has been executed (b) nature of the agreement; on October 22, 2026. ( c) date of execution of the ( d) The SPA has been amended vide the agreement; Amendment Agreement to remove any residual ambiguity as to the Sellers' status as the (d) details of amendment and promoter or promoter group of the Target impact thereof or reasons of Company, by deleting Clause 9.5 (Lock-in on termination and impact thereof Sellers' Shareholding) and Clause 9.6 (Right of First Refusal) in their entirety, such that the Sellers' shares will no longer be subject to any lock-in and the Purchaser will no longer hold a right of first refusal over the Sellers' retained shareholding.