... steel,copper organic phosphonate low price Air-conditioning Cooling Water Corrosion Inhibitor DM-8303 PropertiesThis product is a new type ... corrosion and scale inhibition effect on the high hardness cooling water (for example, H = 1000ppm, CaCO3 dollars), applicable ... steel, etc., widely used in the air-conditioning cooling water in hotels, restaurants, etc.. Quality IndexAppearance: light yellow ...