RISHI CHEMICAL WORKS (PVT) LTD. KOH-NOOR', 105, Park Street, Kolkata-700 016, West Bengal, India Manufacturer of Calcium Propionate, Ferric Pyrophosphate (Soluble / Insoluble), Magnesium Sulphate, Potassium Potassium Dihydrogen Citrate... Contact Person: Mr. P. R. Bharech Send Inquiry