Everything you always wanted to know about MSM but didn't know enough to ask about :P Note that I'm not claiming to know what more than half of this shit means -- just for the record, heh...Quote from: MSM Datasheet-- Methyl Sulfonyl MethaneMolecular formula: (CH3)2SO2Molecular weight: 94Appearance: white crystalline powder -- PropertiesEasily soluble in water, ethanol and acetone, slightly soluble in toluene and chloroform, water solubility: 5C 10g,10C 16g,30 C 37g,60C 120g,95C 250g; solubility in methanol -10 C 1g,0C 3.5g,30 C 20g,60 C 34g; its water solution is neutral.White needle-like crystal.M.P. ( 760mmHg ): 109B.P. ( 760mmHg ): 238Density (d4110 ): 1.1702Specific weight (26 C): 1.450-1.455Viscosity (125 C): 1.140CP( centipoise )Refractive index (20 C): 1.4228Dielectric constant (110 C): 47.39 MHZDipole moment (20 C): 4.25DebyeVapor tension: 112 C: 8.6mmHg 250 C: 769.4mmHgFlash point ( open ): 143 CSpecific heat: Liquid 121 C: 0.53cal/gC Solid 25 C:  0.31 cal/g CHeat of combustion ( 25 C constant volume ): -429.42 Kcal/mol (-428.29)Heat of formation ( 180 C): -107.5 Kcal/mol(-108.3)Heat of melting ( 9 C): 4.374 Kcal/molHeat of sublimation (25 C , 76.0mmHg): 18.4 Kcal/molHeat of vaporization (25 C): 15.1 Kcal/mol