Methanesulfonic acid

Melting point  19 °C 

Boiling point  167 °C10 mm Hg(lit.)

density  1.481 g/mL at 25 °C(lit.)

vapor density  3.3 (vs air)

vapor pressure  1 mm Hg ( 20 °C)

refractive index  n20/D 1.429(lit.)

Fp  >230 °F

storage temp.  2-8°C 

solubility  water: soluble1,000 g/L at 20°C 

pka -2.6(at 25℃) 

form  Solution 

color  brown

Specific Gravity 1.48 (18/4℃) 

Water Solubility  Miscible with water. Slightly miscible with benzene and toluene. Immiscible with paraffins.