OSTER CHEMICAL and PHARMA. WORKS P. LTD. Address: 124/4A, Maniktola Street, Kolkata-700 006, West Bengal, India Contact Person: Manufacturer of Calcium Acetate LR/AR, Ferrous Sulphate LR/AR, Hydrochloric Acid LR/AR (Iron Free), Nitric Acid LR/AR, Sulphuric Acid LR/AR, Metallic Salts of Cadmium, Cobalt, Copper, Nickel & Tin, Ferric Chloride Soln. (60%), Ammonium Hydroxide LR/AR