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NIOSH

DIMETHYLSULPHIDE

ICSC: 0878

Thiobismethane
Methylsulphide
C2H6S / (CH3)2S
Molecular mass: 62.1
ICSC # 0878 		CAS # 75-18-3
RTECS # PV5075000
UN # 1164
March 24, 1999 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames, NO sparks, and NO smoking.
Powder , foam , carbon dioxide .
EXPLOSION Vapour/air mixtures are explosive.
Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling.
In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE


•INHALATION Cough. Nausea. Sore throat. Weakness.
Local exhaust or breathing protection.
Fresh air, rest. Refer for medical attention.
•SKIN Redness. Pain.
Protective gloves.
Remove contaminated clothes. Rinse and then wash skin with water and soap.
•EYES Redness.
Safety spectacles.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
•INGESTION Weakness.
Do not eat, drink, or smoke during work.
Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Give one or two glasses of water to drink. Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Evacuate danger area! Consult an expert! Collect leaking liquid in sealable containers. Do NOT wash away into sewer. (Extra personal protection: filter respirator for organic gases and vapours).
Fireproof. Separated from strong oxidants. Cool.

UN Hazard Class: 3
UN Packing Group: II
ICSC: 0878 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

DIMETHYLSULPHIDE

ICSC: 0878

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PHYSICAL STATE; APPEARANCE:
COLOURLESS LIQUID , WITH CHARACTERISTIC ODOUR.

PHYSICAL DANGERS:
The vapour is heavier than air and may travel along the ground; distant ignition possible.

CHEMICAL DANGERS:
The substance decomposes on burning producing toxic and corrosive fumes ( sulfur oxides ). Reacts violently with oxidants causing fire and explosion hazard.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 10 ppm as TWA (ACGIH 2008).
IIb (not established but data is available) (DFG 2008).


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its vapour and by ingestion.

INHALATION RISK:
A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20°C.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is irritating to the eyes and the skin .

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:

PHYSICAL
PROPERTIES

Boiling point: 37.3°C
Melting point: -98°C
Relative density (water = 1): 0.85
Solubility in water:
none
Vapour pressure, kPa at 20°C: 53.2
Relative vapour density (air = 1): 2.1
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.6
Flash point: -49°C
Auto-ignition temperature: 205°C
Explosive limits, vol% in air: 2.2 - 19.7
Octanol/water partition coefficient as log Pow: 0.84

ENVIRONMENTAL
DATA


N O T E S

Transport Emergency Card: TEC (R)-30G30

NFPA Code: H2; F4; R0;
Card has been partially updated in November 2008: see Occupational Exposure Limits,

ADDITIONAL INFORMATION



ICSC: 0878 DIMETHYLSULPHIDE
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, 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. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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