1. MF HNO3 2. CAS No.: 7697-37-2 Physical State: Liquid Appearance: clear to yellow Odor: strong odor - acrid odor - suffocating odor pH: 1.0 (0.1M soln) Vapor Pressure: 51 mm Hg @ 25 deg C Vapor Density: 2.17 (air=1) Evaporation Rate: Not available. Viscosity: 0.761 cps @ 25 deg C Boiling Point: 86 deg C Freezing/Melting Point:-42 deg C Solubility: Soluble in water. Specific Gravity/Density:1.4 Molecular Formula:HNO3 Molecular Weight:63.01 Class 8. UN 2031 , Packing Group : II