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SODIUM SELENITE
ICSC: 0698
Peer-Review Status: 27.11.1998 Validated
Disodium selenite
Selenious acid, disodium salt
Disodium selenium trioxide 
CAS #: 10102-18-8 RTECS #: VS7350000
UN #: 2630
EC #: 034-003-00-3
EINECS #: 233-267-9
 		    Formula: Na2SeO3
Molecular mass: 172.9

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.  Use 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.  Use 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.  Wear 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 refer for medical attention. 
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: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into covered sealable containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations.  Do not transport with food and feedstuffs. 
EC 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 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61GT5-I.  Separated from strong acids and food and feedstuffs. Well closed. Store in an area without drain or sewer access. 

IMPORTANT DATA
Physical State; Appearance
HYGROSCOPIC SOLID IN VARIOUS FORMS. 

Physical dangers
 

Chemical dangers
Decomposes on contact with hot surfaces or flames. This produces toxic gases. The solution in water is a weak base. Reacts with strong acids. This generates toxic hazard. 

Occupational exposure limits
TLV (as Se): 0.2mg/m³ as TWA; (ACGIH 2005).
MAK (inhalable fraction): 0.05 mg/m³; Carcinogen category: 3B; Peak limitation category: II(4); Pregnancy risk group: C; (DFG 2006). 

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

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly. 

Effects of short-term exposure
The substance is irritating to the eyes, skin and 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 ENVIRONMENTAL DATA
Decomposes at 320°C
Solubility in water, g/100ml at 20°C: 85   		The substance is toxic to aquatic organisms. Bioaccumulation of this chemical may occur along the food chain, for example in plants and fish. It is strongly advised not to let the chemical enter into the environment. 

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.
Card has been partially updated in August 2007: see Storage, Occupational Exposure Limits, Environmental Data. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety 		WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
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    See Also:
       Toxicological Abbreviations