Pure product is a colorless, scentless, transparent and oleaginous liquid and has strong acidity. Industrial sulfuric acid sold in the market is colorless to light yellow even to red brown. Relative density(98 percent of Sulfuric acid)is 1.8365(20°C);Melting point is 10.35°C; Boling point is 338°C. It has strong bibulous ability and can be mixed with water in any different proportion to emit lots of heats. It is an inorganic strong acid and has strong causticity. Its chemical property is very active. It can react with all metals, oxides and hydrates to make sulphate. Only water can be put when diluting sulfuric acid,please do not put acid to prevent surface heat to become blasted. Sulfuric acid below 76 percent of concentration can emit hydrogen when reacting with metals.