Se
(powder)
ICSC # 0072
CAS # 7782-49-2
RTECS # VS7700000
EC # 034-001-00-2
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Combustible.
Gives off irritating or toxic fumes (or gases) in a fire.
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NO open flames.
NO contact with oxidants.
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Powder, AFFF, foam, carbon dioxide.
NO water
.
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Explosion
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Risk of fire and explosion on contact with oxidants.
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Exposure
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PREVENT DISPERSION OF DUST!
STRICT HYGIENE!
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•Inhalation
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Irritation of nose.
Cough.
Dizziness.
Headache.
Laboured breathing.
Nausea.
Sore throat.
Vomiting.
Weakness.
Symptoms may be delayed (see Notes).
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Ventilation, local exhaust, or breathing protection.
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Fresh air, rest.
Refer for medical attention.
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•Skin
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Redness.
Skin burns.
Pain.
Discolouration.
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Protective gloves.
Protective clothing.
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Rinse skin with plenty of water or shower.
Refer for medical attention.
Remove and isolate contaminated clothes.
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•Eyes
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Redness.
Pain.
Blurred vision.
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Safety spectacles
or
eye protection in combination with breathing protection.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Metallic taste.
Diarrhoea.
Chills. Fever.
(Further see Inhalation).
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Induce vomiting (ONLY IN CONSCIOUS PERSONS!).
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Do NOT wash away into sewer.
Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting.
Carefully collect remainder,
then remove to safe place.
Personal protection: P3 filter respirator for toxic particles.
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Fireproof.
Separated from
strong oxidants,
strong acids,
food and feedstuffs
.
Dry.
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Airtight.
Do not transport with food and feedstuffs.
T symbol
R: 23/25-33-53
S: 1/2-20/21-28-45-61
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Important Data
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Physical State; Appearance:
ODOURLESS
SOLID IN VARIOUS FORMS.
DARK RED-BROWN TO BLUISH-BLACK AMORPHOUS SOLID OR RED TRANSPARENT CRYSTALS OR METALLIC GREY TO BLACK CRYSTALS.
Physical Dangers:
Chemical Dangers:
Upon heating, toxic fumes are formed.
Reacts
violently with
oxidants
strong acids
.
Reacts withwater at 50°C forming flammable/explosive gas (hydrogen - see ICSC0001) and selenious acids.
Reacts with incandescence on gentle heating with phosphorous and metals such as nickel, zinc, sodium, potassium, platinum.
Occupational Exposure Limits:
TLV: 0.2 mg/m3 as TWA; (ACGIH 2004).
MAK: (Inhalable fraction) 0.05 mg/m3
Peak limitation category: II(4); Carcinogen category: 3B; Pregnancy risk group: C;
(DFG 2004).
OSHA PEL*: TWA 0.2 mg/m3 *Note: The PEL also applies to other selenium compounds (as Se) except Selenium hexafluoride.
NIOSH REL*: TWA 0.2 mg/m3 *Note: The REL also applies to other selenium compounds (as Se) except Selenium hexafluoride.
NIOSH IDLH: 1 mg/m3 (as Se) See: 7782492
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation,
through the skin
and
by ingestion.
Inhalation Risk:
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed.
Effects of Short-Term Exposure:
The substance
is irritating to
the eyes
and
the respiratory tract
.
Inhalation of dust may cause lung oedema (see Notes).
Inhalation of fume may cause symptoms of asphyxiation, chills and fever and bronchitis.
The effects may be delayed.
Effects of Long-Term or Repeated Exposure:
Repeated or prolonged contact with skin may cause dermatitis.
The substance may have effects on the respiratory tract, gastrointestinal tract, and skin
, resulting in nausea, vomiting, cough, yellowish skin discolouration, loss of nails, garlic breath and bad teeth.
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Physical
Properties
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Boiling point: 685°C
Melting point: 170-217°C
Relative density (water = 1): 4.8
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Solubility in water:
none
Vapour pressure, Pa at 20°C: 0.1
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Environmental
Data
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N O T E S
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Do NOT take working clothes home.
Card has been partly updated in April 2005. See sections Occupational Exposure Limits, EU classification, Emergency Response.
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ADDITIONAL INFORMATION
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ICSC: 0072
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SELENIUM
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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