CAS #: 7647-01-0 F.W.: 36.46 NFPA #: 3-0-2 Specific Gravity: 1.100 DOT: 8/II Trace metal grade. Low ppb metal impurities. Note: Results reported at time of bottling in glass. The levels of Al, B, Ca, K, Mg, Mn, Na, and Si will increase over time.