Enclosed is the details.

29.10.2026 National Stock Exchange of India Limited BSE Limited Exchange Plaza, Plot no. C/1, Phiroze JeeJeebhoy Towers, G Block, Bandra-Kurla Complex Dalal Street, Fort, Bandra (E), Mumbai - 400 051 Mumbai – 400 001 Trading Symbol: CLEAN Scrip Code: 543318 Subject: Disclosure under Regulation 30 of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 for intimation of successful conduct and completion of product trials by Clean Fino-Chem Limited, Wholly Owned Subsidiary of the Company. Dear Sir/Madam, In continuation of our earlier intimation letter dated July 16, 2026, and pursuant to Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, we wish to inform you that, Clean Fino-Chem Limited (“CFCL”), a wholly owned subsidiary of the Company, has successfully conducted and completed product trials for its advanced grades of HALS products, developed in collaboration with Geneus Chem AG. The products have met with the Company’s internal quality benchmarks and applicable international regulatory standards, demonstrating optimum efficiency and commercial viability, as agreed in collaboration. The successful conduct and completion of these trials marks a significant milestone towards the commercial launch of the new product range, which would be expected to commence in H2 of FY 2026–27. The introduction of these products is aligned with the Company’s strategic growth objectives and is expected to support its efforts to expand its market presence. You are requested to take above information on record. Thanking You. For Clean Science and Technology Limited Ruchita Vij Company Secretary and Compliance Officer