ICSC 0019 - 2-METHYL-2-PROPANETHIOL

2-METHYL-2-PROPANETHIOL	ICSC: 0019 (April 2004)
tert-Butyl mercaptan

CAS #: 75-66-1

UN #: 2347

EC Number: 200-890-2

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Highly flammable. Vapour/air mixtures are explosive.	NO open flames, NO sparks and NO smoking. Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling.	Use foam, carbon dioxide, powder. In case of fire: keep drums, etc., cool by spraying with water.


	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Cough. Dizziness. Headache. Nausea. Drowsiness.	Use ventilation, local exhaust or breathing protection.	Fresh air, rest. Refer for medical attention.
Skin		Protective gloves.	Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes	Redness.	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	Nausea. Vomiting.	Do not eat, drink, or smoke during work.	Rinse mouth.

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Evacuate danger area! Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Remove all ignition sources. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. Do NOT wash away into sewer.	According to UN GHS Criteria Transportation UN Classification UN Hazard Class: 3; UN Pack Group: II
STORAGE
Fireproof. Separated from strong oxidants, strong bases, strong acids, metals and strong reducing agents.
PACKAGING

2-METHYL-2-PROPANETHIOL

ICSC: 0019

PHYSICAL & CHEMICAL INFORMATION
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 Decomposes on burning. This produces toxic gases including sulfur oxides. Reacts with strong acids, strong bases, metals, strong oxidants and strong reducing agents. This produces sulfur oxides.	Formula: (CH₃)₃CSH / C₄H₁₀S Molecular mass: 90.2 Boiling point: 64°C Melting point: 0°C Relative density (water = 1): 0.80 Vapour pressure, kPa at 20°C: 19.0 Relative vapour density (air = 1): 3.1 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.4 Flash point: -26°C c.c.

PHYSICAL & CHEMICAL INFORMATION

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
Decomposes on burning. This produces toxic gases including sulfur oxides. Reacts with strong acids, strong bases, metals, strong oxidants and strong reducing agents. This produces sulfur oxides.

Formula: (CH₃)₃CSH / C₄H₁₀S
Molecular mass: 90.2
Boiling point: 64°C
Melting point: 0°C
Relative density (water = 1): 0.80
Vapour pressure, kPa at 20°C: 19.0
Relative vapour density (air = 1): 3.1
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.4
Flash point: -26°C c.c.

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation. Effects of short-term exposure The substance is irritating to the eyes and respiratory tract. Exposure at high levels could cause lowering of consciousness.	Inhalation risk A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20°C. Effects of long-term or repeated exposure

EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is irritating to the eyes and respiratory tract. Exposure at high levels could cause lowering of consciousness.

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

Effects of long-term or repeated exposure

OCCUPATIONAL EXPOSURE LIMITS
MAK: 3.74 mg/m³, 1 ppm; peak limitation category: II(2); pregnancy risk group: C; skin absorption (H); sensitization of skin (SH)

ENVIRONMENT

NOTES
The auto-ignition temperature is unknown in the literature. Explosive limits are unknown in literature, although the substance is combustible and has a flash point < 61°C. Health effects of exposure to the substance have not been investigated adequately.

ADDITIONAL INFORMATION

EC Classification

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    See Also:
       Toxicological Abbreviations