Hydrochloric Acid 35-37%Please note this item is restricted and now requires authorisation to purchase. Please contact our customer service team by phone or e-mail who can assist you further.Molecular Weight: 36.46g/molCAS Number: 7647-01-0Hazard: H315 H319 H335Precaution: P260 P280 P303+P361+P353 P304+P340 P310 P305+P351+P338