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tert-OCTYL MERCAPTAN ICSC: 1494
Date of Peer Review: November 2003

2,4,4-Trimethyl-2-pentanethiol
tert-Octanethiol
2-Methyl-2-heptanethiol
CAS # 141-59-3 C8H18S / (CH3)2CSHCH2C(CH3)3
RTECS # SA3260000 Molecular mass: 146.3
UN # 3023
EC #
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Flammable. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames, NO sparks, and NO smoking.
Powder, carbon dioxide, foam.
EXPLOSION Above 46C explosive vapour/air mixtures may be formed.
Above 46C use a closed system, ventilation, and explosion-proof electrical equipment.
In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
STRICT HYGIENE!

Inhalation Headache. Nausea. Vomiting. Dizziness. Unconsciousness.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Artificial respiration may be needed. Refer for medical attention.
Skin
Protective gloves.
Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes Redness.
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. Wash hands before eating.
Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent and remove to safe place. (Extra personal protection: chemical protection suit including self-contained breathing apparatus.)
EU Classification
UN Classification
UN Hazard Class: 6.1
UN Subsidiary Risks: 3
UN Pack Group: I
EMERGENCY RESPONSE STORAGE
NFPA Code: H2; F2; R0;
Transport Emergency Card: TEC (R)-61GTF1-I
Fireproof. Separated from strong bases, strong acids and oxidants.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 1999

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tert-OCTYL MERCAPTAN ICSC: 1494
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS LIQUID, WITH CHARACTERISTIC ODOUR.

CHEMICAL DANGERS:
The substance decomposes on burning producing toxic gases including hydrogen sulfide and sulfur oxides. Reacts violently with oxidants causing fire hazard. Reacts with strong acids, strong bases and strong reducing agents. Attacks many metals and rubber.

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established. MAK not established.
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation, through the skin and 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 20C.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is mildly irritating to the eyes. The substance may cause effects on the central nervous system, resulting in convulsions, lowering of consciousness and respiratory depression. Exposure may result in death.

PHYSICAL PROPERTIES
Boiling point: 155C
Melting point: -74C
Relative density (water = 1): 0.85
Solubility in water: none
Relative vapour density (air = 1): 5.0
Flash point: 46C o.c.
Explosive limits, vol% in air: 0.8-?
ENVIRONMENTAL DATA

NOTES
Environmental effects from the substance have not been investigated.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor 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
IPCS, CEC 1999
See Also:
        Octyl n-, mercaptan (ICSC)