International Chemical Safety Cards

METHANESULFONYL CHLORIDE ICSC: 1163
METHANESULFONYL CHLORIDE
Mesyl chloride
Methylsulfonyl chloride
Methanesulfonic acid chloride
CH3ClO2S
Molecular mass: 114.6
CAS # 124-63-0
RTECS # PB2790000
ICSC # 1163
UN # 3246
TYPES OF
HAZARD/
EXPOSURE 		ACUTE HAZARDS/
SYMPTOMS 		PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames.
Powder, water spray, foam, carbon dioxide.
EXPLOSION


 
EXPOSURE


INHALATION Corrosive. Burning sensation. Cough. Sore throat.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Refer for medical attention.
SKIN Redness. Pain. Blisters.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
EYES Redness. Pain. Severe deep burns.
Safety goggles, face shield, or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
INGESTION Abdominal cramps. Burning sensation.
Do not eat, drink, or smoke during work.
Rinse mouth. Do NOT induce vomiting. Refer for medical attention.
SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Collect leaking liquid in sealable dry containers. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Do NOT wash away into sewer (extra personal protection: complete protective clothing including self-contained breathing apparatus).
Separated from food and feedstuffs. Dry. Well closed. Keep in a well-ventilated room.
Airtight. Unbreakable packaging; put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.
UN Hazard Class: 6.1
UN Subsidiary Risks: 8
UN Packing Group: I
SEE IMPORTANT INFORMATION ON BACK
ICSC: 1163 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

International Chemical Safety Cards

METHANESULFONYL CHLORIDE ICSC: 1163

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PHYSICAL STATE; APPEARANCE:
COLOURLESS TO PALE YELLOW FUMING LIQUID.

PHYSICAL DANGERS:


CHEMICAL DANGERS:
The substance decomposes on heating or on burning producing toxic and corrosive fumes including hydrogen chloride and sulphur oxides. Reacts violently with bases including ammonia and many other substances causing fire and explosion hazard. Reacts with water and steam producing toxic and corrosive fumes including hydrogen chloride.

OCCUPATIONAL EXPOSURE LIMITS (OELs):
TLV not established.


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation or by ingestion.

INHALATION RISK:
No indication can be given about the rate in which a harmful concentration in the air is reached on evaporation of this substance at 20°C.

EFFECTS OF SHORT-TERM EXPOSURE:
Tear drawing. The substance is corrosive to the eyes, the skin and the respiratory tract. Corrosive on ingestion.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
PHYSICAL
PROPERTIES
 Boiling point at 97.3kPa: 161°C
Melting point: -32°C
Relative density (water = 1): 1.5
Solubility in water: reaction		 Vapour pressure, kPa at 20°C: 0.27
Relative vapour density (air = 1): 4.0
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.01
Flash point: >110°C
ENVIRONMENTAL
DATA
 The substance is harmful to aquatic organisms.
N O T E S
Transport Emergency Card: TEC (R)-61G61a
ADDITIONAL INFORMATION


ICSC: 1163 METHANESULFONYL CHLORIDE
© IPCS, CEC, 1993
IMPORTANT LEGAL NOTICE: Neither the CEC or the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use.