 (1)Brief
Trade name: Dimethyl sulfone ; MethylSulfonyl Methane (MSM)
CAS No.:[67-71-0]
Molecular formula: (CH3)2SO2
Molecular weight: 94
Structural formula :  
Appearance:white crystalline powder
Assay NLT 99.9%
Use:Nourishment additive
Packing: 25kg cardboard drum
Normal spec.: 20-40 mesh, 40-80 mesh, 80-100mesh(
silica gel can be added upon clients' requests.)
Special spec.:Upon clients' requests.
(2) Quality index
ITEMS STANDARD
A ppearance White crystalline
Boiling point 238 °C
Melting point 108-109 °C
Assay(GC) 99.9%min
Moisture Contain 0.5%max
E.Coli Negative
Heavy metals 5ppmmax
SALMONELLA NEGATIVE
(3)Property
Easily soluble in water, ethanol and acetone, slightly soluble in toluene and chloroform, water solubility: 5°C 10g,10°C 16g,30 °C 37g,60°C 120g,95°C 250g; solubility in methanol -10 °C 1g,0°C 3.5g,30 °C 20g,60 °C 34g; its water solution is neutral.
Property |
White needle-like crystal |
M.P. ( 760mmHg ) |
109 |
B.P. ( 760mmHg ) |
238 |
Density (d4110 ) |
1.1702 |
Specific weight (26 °C) |
1.450-1.455 |
Viscosity (125 °C) |
1.140CP( centipoise ) |
Refractive index (20 °C) |
1.4228 |
Dielectric constant (110 °C) |
47.39 MHZ |
Dipole moment (20 °C) |
4.25Debye |
Vapor tension |
112 °C |
8.6mmHg |
250 °C |
769.4mmHg |
Flash point ( open ) |
143 °C |
Specific heat |
Liquid 121 °C |
0.53cal/g·°C |
Solid 25 °C |
0.31 cal/g ·°C |
Heat 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/mol |
Heat of sublimation (25 °C , 76.0mmHg) |
18.4 Kcal/mol |
Hheat of vaporization (25 °C) |
15.1 Kcal/mol |
(4)Application
It is widely used in medical area |
