Anupam Rasayan India Ltd, one of India’s leading custom synthesis and speciality chemical players on Tuesday announced that its Board of Directors has approved the acquisition of 24.96 per cent of the total equity shareholding of and joint control of Tanfac Industries Limited from Birla Group Holdings Private Limited (a promoter company which is part of Aditya Birla Group) and few other promoter group of TIL and the launching of an open offer under the Securities Exchange Board of India (Substantial Acquisition of Shares and Takeover) Regulations, 2011 to acquire a further 26 per cent shareholding from the public shareholders of TIL.