SAST Archean Chemical Industries Ltd - 543657 - Disclosures under Reg. 31(1) and 31(2) of SEBI (SAST) … BSE India The Exchange has received Disclosure under Regulation 31(1) and 31(2) of SEBI (Substantial Acquisition of Shares & Takeovers) Regulations, 2011 on September 29, 2025 for Chemikas Speciality LLP