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ETHANETHIOL
ICSC: 0470
Peer-Review Status: 27.10.2004 Validated
Ethyl mercaptan
Thioethyl alcohol 
CAS #: 75-08-1 RTECS #: KI9625000
UN #: 2363
EC #: 016-022-00-9
EINECS #: 200-837-3
    Formula: C2H5SH
Molecular mass: 62.1

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Extremely flammable. Gives off irritating or toxic fumes (or gases) in a fire.  NO open flames, NO sparks and NO smoking.  Use powder, foam, carbon dioxide. 
EXPLOSION Vapour/air mixtures are explosive.  Closed system, ventilation, explosion-proof electrical equipment and lighting.  In case of fire: keep drums, etc., cool by spraying with water. 
 
EXPOSURE   STRICT HYGIENE!   
Inhalation Dizziness. Headache. Nausea. Vomiting. Tremor. Weakness. Unconciousness.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Artificial respiration may be needed. Refer for medical attention. 
Skin Redness.  Protective gloves.  Rinse skin with plenty of water or shower. Rinse skin with plenty of water or shower. 
Eyes Redness. Pain.  Wear safety goggles or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion See Inhalation.  Do not eat, drink, or smoke during work.  Rinse mouth. Rinse mouth. Give one or two glasses of water to drink. Do NOT induce vomiting. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Evacuate danger area! Personal protection: self-contained breathing apparatus. Do NOT wash away into sewer. Collect leaking and spilled liquid in sealable containers as far as possible.   
EC Classification
Symbol: F, Xn, N; R: 11-20-50/53; S: (2)-16-25-60-61 
UN Classification
UN Hazard Class: 3; UN Pack Group: I 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-30S2363.
NFPA Code: H2; F4; R0. 
Fireproof. Separated from strong oxidants and strong acids. Cool. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS LIQUID WITH PUNGENT ODOUR. 

Physical dangers
The vapour is heavier than air and may travel along the ground; distant ignition possible. 

Chemical dangers
Decomposes on heating. This produces toxic fumes including hydrogen sulfide (see ICSC 0165) and sulfur oxides. The substance is a weak acid. Reacts with oxidants. This generates fire and explosion hazard. Reacts with strong acids. This produces toxic gases of of hydrogen sulfide and sulfur oxides. 

Occupational exposure limits
TLV: 0.5ppm as TWA; (ACGIH 2004).
MAK: 0.5 ppm, 1.3 mg/m³; Peak limitation category: II(2); Pregnancy risk group: D; (DFG 2006). 

Routes of exposure
The substance can be absorbed into the body by inhalation and by ingestion. 

Inhalation risk
A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C. 

Effects of short-term exposure
The substance is irritating to the eyes, skin and respiratory tract. The substance may cause effects on the central nervous system. This may result in lowering of consciousness and respiratory depression. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 35°C
Melting point: -144.4°C
Relative density (water = 1): 0.839
Solubility in water, g/100ml at 20°C: 0.68
Vapour pressure, kPa at 20°C: 58.9
Relative vapour density (air = 1): 2.14
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.5
Flash point: -48.3°C
Auto-ignition temperature: 299°C
Explosive limits, vol% in air: 2.8-18.2
Octanol/water partition coefficient as log Pow: 1.5  
 

NOTES
Card has been partially updated in July 2007: see Occupational Exposure Limits, Ingestion First Aid. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations