SIGMA SOLVENTS and PHARMACEUTICALS LTD. Address: 2, Jasmit Duplex, 22, Patel Society, Gulbai Tekra, Ahmedabad-380 006, Gujarat, India Contact Person: Mr. Dipen Bhatt Manufacturer of Diethyl Ether (Solvent Ether IP/BP), Diethyl Ether (LR/AR/Dry), Anesthatic Ether (IP/BP)