Compliance certificate under Reg. 74(5) of SEBI (DP) Regulations, 2018

October 12, 2026 National Stock Exchange of India Limited BSE Limited Exchange Plaza Listing Operations Bandra-Kurla Complex, Bandra (E) P J Towers Dalal Street Mumbai-400051 Mumbai-400001 Symbol-ACI Scrip Code- 543657 Dear Sirs, Sub: Intimation under Regulation 74(5) of SEBI (Depositories and Participants), Regulations 2018 Pursuant to Regulation 74(5) of SEBI (Depositories and Participants) Regulations, 2018, a certificate has been issued by our Registrar & Share Transfer Agent, M/s MUFG Intime India Private Limited (Formerly known as Link Intime India Private Limited) confirming the compliance under the said Regulation for the quarter ended September 30, 2026. The same is enclosed with this intimation for your records. Thanking you Yours faithfully For Archean Chemical Industries Limited Vijayaraghavan N E Company Secretary & Compliance Officer M. No. A41671 Enc: as above Corporate Office: SKCL Summit, No. 47/C3, 10th Floor, Gandhi Mandapam Road, Kotturpuram , Chennai – 600085 Registered Office: No.2, North Crescent Road, T Nagar, Chennai, Tamil Nadu, India – 600017 CIN: L24298TN2009PLC072270 | info@archeanchemicals.com | Ph: +91 44 - 610 99 999 | www.archeanchemicals.com MUFG Intime India Private Limited (Formerly Link Intime India Private Limited) CIN: U67190MH1999PTC118368 Registered Address: C-101, Embassy 247, L.B.S. Marg, Vikhroli (West), Mumbai - 400083. Tel: +91 22 4918 6000 www.in.mpms.mufg.com Date : 03-10-2026 The Compliance Officer/ Company Secretary ARCHEAN CHEMICAL INDUSTRIES LIMITED NO. 2, NORTH CRESCENT ROAD T NAGAR CHENNAI TAMIL NADU CHENNAI PINCODE : 600017 Sub : Confirmation Certificate under Regulation 74(5) of Securities and Exchange Board of India (Depositories and Participants) Regulations, 2018. Dear Sir/Madam, In reference to the above captioned regulation, we hereby confirm that the securities received from the depository participants for dematerialisation during the quarter ended 30th September 2026, were confirmed (accepted/rejected) to the depositories by us and that securities comprised in the said certificates have been listed on the stock exchanges where the earlier issued securities are listed. We hereby also confirm that the security certificates received for dematerialisation have been confirmed/rejected and the security certificates received were mutilated and cancelled after due verification by the depository participant and the name of the depositories have been substituted in the register of members as the registered owner within the prescribed timelines. We request you to kindly take note of the above in your records. Thanking you, Yours faithfully, For MUFG Intime India Private Limited (Formerly Link Intime India Private Limited) Ashok Shetty Sr. Vice President-Corporate Registry MUFG Intime India Private Limited A part of MUFG Corporate Markets, a division of MUFG Pension & Market Services