DUNGRA CHEMICALS PVT. LTD. Address: Plot No. 36, 1st Phase, GIDC, Vapi-396 195, Dist. Valsad, Gujarat, India Contact Person: Mr. Rameshbhai Patwari, Mr. Amulbhai Patwari Manufacturer of Sodium Thiosulpbate, Sodium Bisulphate, Potassium Metabisulphite, Photographic Chemicals