ICSC 1651 - ISOBUTYL NITRITE

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ISOBUTYL NITRITE	ICSC: 1651 (May 2006)
Nitrous acid, 2-methylpropyl ester Nitrous acid, isobutyl ester

CAS #: 542-56-3

UN #: 1992

EC Number: 208-819-7

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire. 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 dry powder, carbon dioxide. In case of fire: keep drums, etc., cool by spraying with water.

AVOID ALL CONTACT!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Sore throat. Headache. Dizziness. Blue lips, fingernails and skin. Nausea. Confusion. Convulsions. Unconsciousness. Symptoms may be delayed. See Notes.	Use ventilation, local exhaust or breathing protection.	Fresh air, rest. Artificial respiration may be needed. Refer for medical attention.
Skin		Protective gloves. Protective clothing.	Rinse and then wash skin with water and soap.
Eyes		Wear safety spectacles.	Rinse with plenty of water for several minutes (remove contact lenses if easily possible).
Ingestion	See Inhalation.	Do not eat, drink, or smoke during work. Wash hands before eating.	Rinse mouth. Give a slurry of activated charcoal in water to drink. Refer for medical attention .

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Personal protection: self-contained breathing apparatus. Evacuate danger area! Consult an expert! Ventilation. 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 DANGER Highly flammable liquid and vapour Harmful if swallowed Toxic if inhaled Suspected of causing cancer Causes damage to blood Transportation UN Classification UN Hazard Class: 3; UN Subsidiary Risks: 6.1; UN Pack Group: III
STORAGE
Fireproof. Separated from acids. Well closed.
PACKAGING
Do not transport with food and feedstuffs.

ISOBUTYL NITRITE

ICSC: 1651

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance COLOURLESS LIQUID. 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 nitrogen oxides.	Formula: C₄H₉NO₂ / (CH₃)₂CHCH₂NO₂ Molecular mass: 103.1 Boiling point: 67°C Relative density (water = 1): 0.87 Solubility in water: very poor Vapour pressure, kPa at 20°C: 1.3 Relative vapour density (air = 1): 3.56 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.19 Flash point: -21°C Explosive limits, vol% in air: 1.2-26.9

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUID.

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 nitrogen oxides.

Formula: C₄H₉NO₂ / (CH₃)₂CHCH₂NO₂
Molecular mass: 103.1
Boiling point: 67°C
Relative density (water = 1): 0.87
Solubility in water: very poor
Vapour pressure, kPa at 20°C: 1.3
Relative vapour density (air = 1): 3.56
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.19
Flash point: -21°C
Explosive limits, vol% in air: 1.2-26.9

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation and by ingestion. Effects of short-term exposure The substance may cause effects on the blood and cardiovascular system. This may result in cardiac disorders and the formation of methaemoglobin. The effects may be delayed. Medical observation is indicated. Exposure at high levels could cause death. See Notes.	Inhalation risk A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C. Effects of long-term or repeated exposure This substance is possibly carcinogenic to humans.

EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance may cause effects on the blood and cardiovascular system. This may result in cardiac disorders and the formation of methaemoglobin. The effects may be delayed. Medical observation is indicated. Exposure at high levels could cause death. See Notes.

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

Effects of long-term or repeated exposure
This substance is possibly carcinogenic to humans.

OCCUPATIONAL EXPOSURE LIMITS
TLV: (ceiling value): 1 ppm as STEL; A3 (confirmed animal carcinogen with unknown relevance to humans); BEI issued

ENVIRONMENT

NOTES
Depending on the degree of exposure, periodic medical examination is suggested. Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available.

ADDITIONAL INFORMATION

EC Classification
Symbol: F, T; R: 11-20/22-45-68; S: 53-45; Note: E

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