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SODIUM SELENITE ICSC: 0698
Date of Peer Review: November 1998

Disodium selenite
Selenious acid, disodium salt
Disodium selenium trioxide
CAS # 10102-18-8 Na2SeO3
RTECS # VS7350000 Molecular mass: 172.9
UN # 2630
EC Index # 034-003-00-3
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Combustible under specific conditions. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames.
Water spray, foam, carbon dioxide, dry sand, special powder.
EXPLOSION


EXPOSURE
PREVENT DISPERSION OF DUST! STRICT HYGIENE!
IN ALL CASES CONSULT A DOCTOR!
Inhalation Abdominal cramps. Cough. Diarrhoea. Dizziness. Headache. Laboured breathing. Nausea. Sore throat. Vomiting. Hair loss.
Local exhaust or breathing protection.
Fresh air, rest. 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 spectacles, face shield or eye protection in combination with breathing protection if powder.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion Abdominal cramps. Vomiting.
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Personal protection: P3 filter respirator for toxic particles. Do NOT let this chemical enter the environment. Sweep spilled substance into sealable containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place.
Do not transport with food and feedstuffs.
EU Classification
Symbol: T+, N
R: 23-28-31-43-51/53
S: (1/2-)-28-36/37-45-61
UN Classification
UN Hazard Class: 6.1
UN Pack Group: I
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-61GT5-I
Separated from strong acids, food and feedstuffs. Well closed.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
SODIUM SELENITE ICSC: 0698
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
HYGROSCOPIC SOLID IN VARIOUS FORMS

CHEMICAL DANGERS:
On contact with hot surfaces or flames this substance decomposes forming toxic gases. The solution in water is a weak base. Reacts with strong acids causing toxic hazard.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: (as Se) 0.2 mg/m as TWA; (ACGIH 2005).
MAK: (Inhalable fraction) 0.05 mg/m; Peak limitation category: 3B; Pregnancy risk group: C; (DFG 2005).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion.

INHALATION RISK:
Evaporation at 20C is negligible; a harmful concentration of airborne particles can, however, be reached quickly.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance irritates the eyes, the skin and the respiratory tract. The substance may cause effects on the liver, heart, nervous system and gastrointestinal tract. Medical observation is indicated.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact with skin may cause dermatitis. The substance may have effects on the central nervous system, bone and blood. See Notes.
PHYSICAL PROPERTIES
Melting point (decomposes): 320C
Solubility in water, g/100 ml at 20C: 85
ENVIRONMENTAL DATA
The substance is toxic to aquatic organisms. Bioaccumulation of this chemical may occur along the food chain, for example in plants and in fish.
NOTES
Do NOT take working clothes home. Also consult ICSC 0072 (Selenium). Card has been partly updated in October 2005. See sections Occupational Exposure Limits, EU classification, Emergency Response.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2005