- Methylsulfonic acid
- MCAT 1201
Colorless liquid at room temperature or white crystalline solid below 20 deg c.
Catalyst in esterification, alkylation, olefin polymerization, peroxidation reactions, chemical intermediate to form secondary methane sulfonates from olefins, chemical intermediate for trifluoromethane sulfonic acid, methane sulfonyl chloride, as solvent.
Registry Numbers and Inventories.
EC Index Number
S 26 36 45
Agricultural Chemical and Pesticide; Mutagen
Swiss Giftliste 1
Japan ENCS (MITI)
Melting point, °C
Boiling point, °C
Vapor pressure, mmHg
0.0004 (25 C)
Vapor density (air=1)
1.502 g/cm3 (0 C)
Solubility in water
11.21 cp (25 C)
49.39 g/s2 (32 C)
1.424 (25 C)
Partition coefficient, pKow
Hazards and Protection.
Store in a tightly closed container. Keep under an argon blanket. Store in a cool, dry, well-ventilated area away from incompatible substances. Corrosives area.
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale. Do not allow contact with water. Wash clothing before reuse. Discard contaminated shoes.
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Provide ventilation. Do not get water inside containers.
Stable under normal temperatures and pressures.
Moisture, HF, Bases, Amines, Strong reducing agents, corrodes steel, ethylvinyl ether, iron, copper, brass, lead.
Carbon monoxide, oxides of sulfur, carbon dioxide.
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Reacts violently with water. Extinguishing media: Use dry chemical, carbon dioxide, or alcohol-resistant foam. Do NOT get water inside containers. Cool containers with flooding quantities of water until well after fire is out.
Combustible material: may burn but does not ignite readily.
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.
Fire may produce irritating, corrosive and/or toxic gases.
Abnormal neuropsychologic function has been reported following hydrochloric acid exposure from a leaking tanker truck.
Harmful if swallowed. Causes gastrointestinal tract burns.
Causes severe respiratory tract irritation.
Contact with liquid is corrosive and causes severe burns and ulceration.
Contact with liquid is corrosive to the eyes and causes severe burns.
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Discard contaminated clothing in a manner which limits further exposure. Destroy contaminated shoes.
Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).
2904 10 00
IMO Pollution Category