The details of show cause notice received under Section 73 of the CGST Act, 2017 along with observation of the Company is attached.

Registered Office: “THIRUMALAI HOUSE”, Plot No. 101-102, Road No. 29, Sion (East), Mumbai – 400 022, India PHONE: +91 – 22– 43686200 FAX +91 – 22 – 24011699 E- MAIL: thirumalai@thirumalaichemicals.com Website: www.thirumalaichemicals.com (AN ISO 9001, 14001, 50001/ HACCP & FSSC 22000 CERTIFIED COMPANY) CIN: L24100MH1972PLC016149 TCL/SE024/2026-27 July 31, 2026 The National Stock Exchange of India BSE Limited Limited Department of Corporate Services Listing Department Floor 25, Phiroze Jeejeebhoy Towers Exchange Plaza, Bandra Kurla Complex Dalal Street Bandra (East) Mumbai 400 001 Mumbai 400 051 Scrip code: 500412 Scrip code: TIRUMALCHM Dear Sir/ Madam, Sub.: Disclosure under Regulation 30 of the Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015 Pursuant to Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, this is to inform that the Company has received a show cause notice from Office of Deputy Commissioner, Commercial Tax Department Ranipet, Tamil Nadu under section 73 of CGST Act 2017 on July 30, 2026. The show cause notice is issued under DRC01 dated July 30, 2026 over tax and other dues amounting to Rs. 2292.66 lakhs for the period 2022-23 towards alleged output turnover discrepancies and input tax discrepancies noticed under Section 73 of CGST Act, 2017. The Company will be submitting its response to the show cause notice before authority within prescribed timelines. The company firmly believes that the financial implication, if any, that may arise out of this is likely to be very insignificant and will not have any material impact on the financial position of the Company. The details as required under SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 read with SEBI Circular No. HO/49/14/14(7)2025-CFD- POD2/I/3762/2026 dated 30th January, 2026 is enclosed as "Annexure - A". Kindly take the above information in your records. Thanking you, Yours faithfully, For Thirumalai Chemicals Limited Aditya Sharma Company Secretary & Compliance officer Encl: As above Annexure to disclosure under Regulation 30 dated July 31, 2026 Annexure – A Sr.No Name of authority Impact on financial, operation or other activities of the Expected Financial Nature and details of the action(s) Details of the violation(s) Corporation, quantifiable in monetary terms to the extent implications, if any, due to taken, initiated or order(s) passed. committed or alleged to be these demand orders. possible committed Tax Interest Penalty Total 1. Deputy The authority has issued a show cause Alleged output turnover Rs. 1356.36 Rs. 800.66 Rs. 135.64 Rs. 2292.66 The Company, prima facie, Commissioner, notice over tax and other dues discrepancies and input tax lakhs lakhs lakhs lakhs believes that the demands are Commercial Tax amounting to 2292.66 lakhs for FY discrepancies noticed under 73 erroneous and not sustainable. Department 2022-23 towards alleged output of CGST Act, 2017 The Company will be Ranipet, Tamil Nadu turnover discrepancies and input tax submitting its response before discrepancies under Section 73 of authority within prescribed timelines. The company firmly CGST Act, 2017 believes that the financial implication, if any, that may arise out of this is likely to be very insignificant and will not have any material impact on the financial position of the Company.