Name | Methanesulfonic acid |
Synonyms | MSA Mesic acid SULFOMETHANE Methylsulfonic Acid Methylsulphonicacid Methanesulfonic acid Methanesulphonic acid acidemethanesulfonique kyselinamethansulfonova Kyselina methansulfonova Methanesulfonicacidaqsoln iron(2+) dimethanesulfonate |
CAS | 75-75-2 17696-73-0 |
EINECS | 200-898-6 |
InChI | InChI=1/2CH4O3S.Fe/c2*1-5(2,3)4;/h2*1H3,(H,2,3,4);/q;;+2/p-2 |
InChIKey | AFVFQIVMOAPDHO-UHFFFAOYSA-N |
Molecular Formula | CH4O3S |
Molar Mass | 96.11 |
Density | 1.475-1.485 g/mL at 20 °C1.481 g/mL at 25 °C (lit.) |
Melting Point | 17-19 °C (lit.) |
Boling Point | 167 °C/10 mmHg (lit.) |
Flash Point | >230°F |
Water Solubility | Miscible with water. Slightly miscible with benzene and toluene. Immiscible with paraffins. |
Solubility | water: soluble1,000 g/L at 20°C |
Vapor Presure | 1 mm Hg ( 20 °C) |
Vapor Density | 3.3 (vs air) |
Appearance | Solution |
Specific Gravity | 1.48 (18/4℃) |
Color | brown |
Maximum wavelength(λmax) | ['λ: 240-320 nm Amax: <0.4'] |
Merck | 14,5954 |
BRN | 1446024 |
pKa | -2.6(at 25℃) |
Storage Condition | 2-8°C |
Stability | Stable. Moisture sensitive. Incompatible with amines, bases, water, common metals. Releases a substantial amount of heat when diluted with water (add acid to water with care if diluting). |
Sensitive | Light Sensitive & Hygroscopic |
Refractive Index | n20/D 1.429(lit.) |
Physical and Chemical Properties | Colored or slightly brown oily liquid, solid at low temperature. The melting point of 20 deg C, boiling point of 167 deg C (13.33kPa),122 deg C (0.133kPa). Relative density 1.4812(18 degrees C), refractive index 1.4317(16 degrees C). Soluble in water, alcohol and ether, insoluble in alkanes, benzene, toluene, etc., the boiling water, hot alkali solution does not decompose, the metal iron, copper and lead have a strong corrosive effect. |
Use | Used as solvent, alkylation, esterification and polymerization catalyst, also used in pharmaceutical and electroplating industry |
Hazard Symbols | C - Corrosive |
Risk Codes | R34 - Causes burns R22 - Harmful if swallowed R21/22 - Harmful in contact with skin and if swallowed. R35 - Causes severe burns |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S1/2 - Keep locked up and out of the reach of children. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. |
UN IDs | UN 3265 8/PG 2 |
WGK Germany | 1 |
RTECS | PB1140000 |
TSCA | Yes |
HS Code | 29041000 |
Hazard Class | 8 |
Packing Group | III |
Toxicity | LD50 orally in Rabbit: 649 mg/kg LD50 dermal Rabbit 200 - 2000 mg/kg |
Raw Materials | Methyl disulfide Methanesulfonyl chloride |
Downstream Products | Methanesulfonic anhydride Sodium trifluoromethanesulfonate Fluconazole Phentolamine Mesylate |
colorless or slightly brown oily liquid, solid at low temperature. Relative density 1. 4812 (18 ℃), melting point 20 ℃, boiling point 167 ℃(13. 33kPa), refractive index 1. 4317 (16 ℃). Soluble in water, alcohol and ether, insoluble in alkanes, benzene, toluene, etc., the hot water, hot alkali solution does not decompose, the metal iron, copper and lead have a strong corrosive effect.
methanesulfonic acid is a raw material for pharmaceuticals and pesticides, and can also be used as a dehydrating agent, a coating curing Accelerator, a fiber treatment agent, and the like.