Hydrochloric acid 31% 1.We have 6 factories 2.We have 15 production line 3.We have 15 years experiences Hydrochloric acid 31% 1.Character : Hydrochloric Acid is a clear, colorless to slightly yellow liquid with a sharp, pungent and irritating order. It is a strong & highly corrosive acid. 2.Hazard Class : 8 3.Uses :Pickling & metal cleaning, general cleaning,food processing,chemical intermediate, ...