ICSC 0072 - SELENIUM

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SELENIUM	ICSC: 0072 (November 2009)

CAS #: 7782-49-2

UN #: 3283 (n.o.s.)

EC Number: 231-957-4

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Not combustible. Gives off irritating or toxic fumes (or gases) in a fire. Risk of fire and explosion on contact with oxidants.	NO open flames. NO contact with oxidizing agents.	Use foam, powder, carbon dioxide. NO water.

STRICT HYGIENE!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Sore throat. Cough. Nasal discharge. Loss of smell. Headache.	Use ventilation, local exhaust or breathing protection.	Fresh air, rest. Refer for medical attention.
Skin	Redness.	Protective gloves.	Rinse and then wash skin with water and soap.
Eyes	Redness.	Wear safety spectacles or eye protection in combination with breathing protection.	Rinse with plenty of water (remove contact lenses if easily possible).
Ingestion	Garlic breath. Diarrhoea.	Do not eat, drink, or smoke during work.	Rinse mouth. Refer 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 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 WARNING May cause respiratory irritation May cause damage to the nervous system and gastrointestinal tract May cause damage to nervous system and gastrointestinal tract through prolonged or repeated exposure Very toxic to aquatic life Transportation UN Classification
STORAGE
Separated from strong oxidants, strong acids and food and feedstuffs. Dry. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing.
PACKAGING
Airtight. Do not transport with food and feedstuffs.

SELENIUM

ICSC: 0072

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance GREY SOLID IN VARIOUS FORMS. Physical dangers No data. Chemical dangers Upon heating, toxic fumes are formed. Reacts with oxidants and strong acids. Reacts , if in amorphous form, with water at 50°C. This produces flammable/explosive gas (hydrogen - see ICSC 0001) and selenious acids.	Formula: Se Atomic mass: 79.0 Boiling point: 685°C Melting point: 217°C Relative density (water = 1): 4.8 Solubility in water: none Vapour pressure, Pa at 20°C: 0.1

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
GREY SOLID IN VARIOUS FORMS.

Physical dangers
No data.

Chemical dangers
Upon heating, toxic fumes are formed. Reacts with oxidants and strong acids. Reacts , if in amorphous form, with water at 50°C. This produces flammable/explosive gas (hydrogen - see ICSC 0001) and selenious acids.

Formula: Se
Atomic mass: 79.0
Boiling point: 685°C
Melting point: 217°C
Relative density (water = 1): 4.8
Solubility in water: none
Vapour pressure, Pa at 20°C: 0.1

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 irritating to the respiratory tract. The substance may cause effects on the gastrointestinal tract and nervous system.	Inhalation risk A harmful concentration of airborne particles can be reached quickly on spraying or when dispersed, especially if powdered. Effects of long-term or repeated exposure The substance may have effects on the respiratory tract, gastrointestinal tract and skin.

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 irritating to the respiratory tract. The substance may cause effects on the gastrointestinal tract and nervous system.

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

Effects of long-term or repeated exposure
The substance may have effects on the respiratory tract, gastrointestinal tract and skin.

OCCUPATIONAL EXPOSURE LIMITS
TLV: 0.2 mg/m³, as TWA. MAK: (inhalable fraction): 0.02 mg/m³; peak limitation category: II(8); skin absorption (H); carcinogen category: 3; pregnancy risk group: C

ENVIRONMENT
The substance is very toxic to aquatic organisms. It is strongly advised not to let the chemical enter into the environment.

NOTES
Do NOT take working clothes home.

ADDITIONAL INFORMATION

EC Classification
Symbol: T; R: 23/25-33-53; S: (1/2)-20/21-28-45-61

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