ICSC 0018 - n-BUTYL MERCAPTAN

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n-BUTYL MERCAPTAN

ICSC: 0018
_{April
2000}

1-Butanethiol
Butyl mercaptan
Thiobutyl alcohol

CAS No: 109-79-5
RTECS No: EK6300000
UN No: 2347

C₄H₁₀S / CH₃(CH₂)₃SH
Molecular mass: 90.2

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.	AFFF, alcohol-resistant foam, powder, 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		STRICT HYGIENE!
Inhalation	Weakness. Confusion. Cough. Dizziness. Drowsiness. Headache. Nausea. Vomiting. Shortness of breath.	Ventilation, local exhaust, or breathing protection.	Fresh air, rest. Artificial respiration if indicated. Refer for medical attention.
Skin	Redness. Pain.	Protective gloves.	Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
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. Refer for medical attention.

SPILLAGE DISPOSAL	PACKAGING & LABELLING
Evacuate danger area! Remove all ignition sources. 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. Do NOT wash away into sewer. Do NOT let this chemical enter the environment. Chemical protection suit including self-contained breathing apparatus.	UN Hazard Class: 3 UN Pack Group: II	Marine pollutant.

EMERGENCY RESPONSE	STORAGE
Transport Emergency Card: TEC (R)-30G30 NFPA Code: H2; F3; R0	Fireproof. Separated from strong oxidants, acids.

IMPORTANT DATA

Physical State; Appearance
COLOURLESS TO YELLOW 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 heating producing toxic fumes (sulfur oxides - see ICSC0074). Reacts with acids, bases and strong oxidants.

Occupational exposure limits
TLV: 0.5 ppm (as TWA) (ACGIH 1999)
MAK: 0.5 ppm; 1.5 mg/m³; (1999)

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

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 irritates the eyes, the skin and the respiratory tract. The substance may cause effects on the thyroid. Exposure far above the OEL may cause effects on the nervous system and could cause lowering of consciousness.

PHYSICAL PROPERTIES

ENVIRONMENTAL DATA

Boiling point: 98°C
Melting point: -116°C
Relative density (water = 1): 0.83
Solubility in water, g/100 ml: 0.06
Vapour pressure, kPa at 20°C: 4.0
Relative vapour density (air = 1): 3.1
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.2
Flash point: 2°C c.c.
Auto-ignition temperature: below 225°C
Explosive limits, vol% in air: see Notes
Octanol/water partition coefficient as log Pow: 2.28

The substance is toxic to aquatic organisms.

NOTES

Explosive limits are unknown in literature.

IPCS
International
Programme on
Chemical Safety

Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2000

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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.

Updated by AS. Approved by EC. Last update: 10.10.2000