... This product is a reductive agent used as materials of medicine, pesticides, dyestuff, blowing agent,and photographic developer.HS Code: ... ethyl ether, flammable and corroding glass, rubber and leather, its severe toxicity accumulates and harms blood and nerves ... This product is a reductive agent used as materials of medicine, pesticides, dyestuff, blowing agent, and photographic developer.Storing and ...