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NIOSH

ETHANETHIOL

ICSC: 0470

Ethyl mercaptan
Thioethyl alcohol
C2H5SH
Molecular mass: 62.1
ICSC # 0470 		CAS # 75-08-1
RTECS # KI9625000
UN # 2363
EC # 016-022-00-9
October 27, 2004 Validated

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.
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. Unconsciousness.
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.
•EYES Redness. Pain.
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 take to a doctor.
•INGESTION (See Inhalation).
Do not eat, drink, or smoke during work.
Rinse mouth. Give one or two glasses of water to drink. Do NOT induce vomiting. Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Evacuate danger area! Collect leaking liquid in sealable containers. Do NOT wash away into sewer. Personal protection: self-contained breathing apparatus.
Fireproof. Separated from strong oxidants, strong acids. Cool.

F symbol
Xn symbol
N symbol
R: 11-20-50/53
S: 2-16-25-60-61
UN Hazard Class: 3
UN Packing Group: I
ICSC: 0470 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.

ETHANETHIOL

ICSC: 0470

I

M

P

O

R

T

A

N

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D

A

T

A

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:
The substance decomposes on heating producing toxic fumes including hydrogen sulfide (See ICSC 0165) and sulfur oxides . The substance is a weak acid. Reacts with oxidants causing fire and explosion hazard. Reacts with strong acids producing toxic gases , hydrogen sulfide and sulfur oxides .

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 0.5 ppm as TWA; (ACGIH 2004).
MAK: 0.5 ppm, 1.3 mg/m3;
Peak limitation category: II(2); Pregnancy risk group: D;
(DFG 2006).
OSHA PEL†: C 10 ppm (25 mg/m3)
NIOSH REL: C 0.5 ppm (1.3 mg/m3) 15-minute
NIOSH IDLH: 500 ppm See: 75081


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 , the skin and the respiratory tract . The substance may cause effects on the central nervous system , resulting in lowering of consciousness and respiratory depression .

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:

PHYSICAL
PROPERTIES

Boiling point: 35°C
Melting point: -144.4°C
Relative density (water = 1): 0.839
Solubility in water, g/100 ml 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

ENVIRONMENTAL
DATA


N O T E S

Transport Emergency Card: TEC (R)-30S2363

NFPA Code: H2; F4; R0;
Card has been partially updated in July 2007: see Occupational Exposure Limits, Ingestion First Aid.

ADDITIONAL INFORMATION



ICSC: 0470 ETHANETHIOL
(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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