ICSC 0950 - SODIUM AZIDE

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SODIUM AZIDE	ICSC: 0950 (April 2014)
Hydrazoic acid, sodium salt Azide Azium

CAS #: 26628-22-8

UN #: 1687

EC Number: 247-852-1

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Combustible. Gives off irritating or toxic fumes (or gases) in a fire. Risk of fire and explosion on contact with acids or metals. Heating will cause rise in pressure with risk of bursting.	NO contact with acids or heavy metals. Do NOT expose to heat, friction or shock.	Use dry sand, special powder. In case of fire: keep drums, etc., cool by spraying with water.

PREVENT DISPERSION OF DUST! STRICT HYGIENE!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Cough. Headache. Nasal congestion. Fall in blood pressure. Shortness of breath. See Notes.	Use local exhaust or breathing protection.	Fresh air, rest. Half-upright position. Refer immediately for medical attention.
Skin		Protective gloves.	Rinse skin with plenty of water or shower. Seek medical attention if you feel unwell.
Eyes	Redness. Pain.	Wear safety spectacles 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	Abdominal pain. Nausea. Sweating. Fall in blood pressure. Increased heart rate. Weakness. Blurred vision. Shock or collapse. See Effects of short-term exposure	Do not eat, drink, or smoke during work.	Rinse mouth. Do NOT induce vomiting. Give one or two glasses of water to drink. Refer immediately for medical attention.

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into covered plastic containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations.	According to UN GHS Criteria Fatal if swallowed Causes eye irritation May cause respiratory irritation May cause damage to cardiovascular system Very toxic to aquatic life Transportation UN Classification UN Hazard Class: 6.1; UN Pack Group: II
STORAGE
Separated from food and feedstuffs, acids and metals. See Chemical Dangers. Provision to contain effluent from fire extinguishing. Store in an area without drain or sewer access.
PACKAGING
Do not transport with food and feedstuffs.

SODIUM AZIDE

ICSC: 0950

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance COLOURLESS HEXAGONAL CRYSTALS. Physical dangers See Notes. Chemical dangers Decomposes on heating above 275°C . This produces toxic fumes. This generates fire and explosion hazard. Reacts with copper, lead, silver, mercury and carbon disulfide. This produces particularly shock-sensitive compounds. Reacts with acids. This produces toxic and explosive hydrogen azide. See Notes.	Formula: NaN₃ Molecular mass: 65.0 Decomposes at 275°C Relative density (water = 1): 1.85 Solubility in water, g/100ml at 17°C: 41.7 (good) Vapour pressure, Pa at 20°C: 1

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS HEXAGONAL CRYSTALS.

Physical dangers
See Notes.

Chemical dangers
Decomposes on heating above 275°C . This produces toxic fumes. This generates fire and explosion hazard. Reacts with copper, lead, silver, mercury and carbon disulfide. This produces particularly shock-sensitive compounds. Reacts with acids. This produces toxic and explosive hydrogen azide. See Notes.

Formula: NaN₃
Molecular mass: 65.0
Decomposes at 275°C
Relative density (water = 1): 1.85
Solubility in water, g/100ml at 17°C: 41.7 (good)
Vapour pressure, Pa at 20°C: 1

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 is mildly irritating to the eyes and upper respiratory tract. The substance may cause effects on the cardiovascular system and central nervous system. This may result in lowering of blood pressure, cardiac disorders and central nervous system disorders. Ingestion of large amounts could cause death. Inhalation of dust may cause asthma-like reactions (RADS).	Inhalation risk A harmful concentration of airborne particles can be reached quickly when dispersed, especially if powdered. Effects of long-term or repeated exposure

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 is mildly irritating to the eyes and upper respiratory tract. The substance may cause effects on the cardiovascular system and central nervous system. This may result in lowering of blood pressure, cardiac disorders and central nervous system disorders. Ingestion of large amounts could cause death. Inhalation of dust may cause asthma-like reactions (RADS).

Inhalation risk
A harmful concentration of airborne particles can be reached quickly when dispersed, especially if powdered.

Effects of long-term or repeated exposure

OCCUPATIONAL EXPOSURE LIMITS
TLV: 0.29 mg/m³ (ceiling value); A4 (not classifiable as a human carcinogen). MAK: 0.2 mg/m³; peak limitation category: I(2); pregnancy risk group: D. EU-OEL: 0.1 mg/m³ as TWA; 0.3 mg/m³ as STEL; (skin)

ENVIRONMENT
The substance is very toxic to aquatic organisms. This substance does enter the environment under normal use. Great care, however, should be taken to avoid any additional release, for example through inappropriate disposal.

NOTES
In presence of heat, acids and water sodium azide is readily transformed to hydrazoic acid, the vapour of which may be present whenever the salt is handled. Inhalation of high concentrations of hydrazoic acid may cause severe respiratory irritation including lung oedema. Decomposition of sodium azide produces large amount of gases. This generates explosion hazard in confined spaces.

ADDITIONAL INFORMATION

EC Classification
Symbol: T+, N; R: 28-32-50/53; S: (1/2)-28-45-60-61

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