n-BUTYL MERCAPTAN

International Chemical Safety Cards

n-BUTYL MERCAPTAN

ICSC: 0018

n-BUTYL MERCAPTAN
1-Butanethiol
Butyl mercaptan
Thiobutyl alcohol
C₄H₁₀S/CH₃(CH₂)₃SH
Molecular mass: 90.2
CAS # 109-79-5
RTECS # EK6300000
ICSC # 0018
UN # 2347

TYPES OF HAZARD/ EXPOSURE	ACUTE HAZARDS/ SYMPTOMS	PREVENTION	FIRST AID/ FIRE FIGHTING
FIRE	Highly flammable. Gives off toxic fumes 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, 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

STORAGE

PACKAGING & LABELLING

Evacuate danger area! 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 (extra personal protection: self-contained breathing apparatus).

Fireproof; separated from strong oxidants, acids, bases, alkali metals.

UN Haz Class: 3
UN Pack Group: II

SEE IMPORTANT INFORMATION ON BACK

ICSC: 0018

Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

International Chemical Safety Cards

n-BUTYL MERCAPTAN

ICSC: 0018

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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 burning or heating, producing highly toxic fumes (sulfur dioxide - see ICSC # 0074). Reacts with acids, bases, alkali metals, and strong oxidants.

OCCUPATIONAL EXPOSURE LIMITS (OELs):
TLV: 0.5 ppm; 1.8 mg/m³ (as TWA) (ACGIH 1992-1993)

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.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:

PHYSICAL
PROPERTIES

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: (c.c.) 2°C
Auto-ignition temperature: below 225°C
Explosive limits, vol% in air: see Notes
Octanol/water partition coefficient as log Pow: 2.28