Sodium tellurite

  • sodium tellurate(IV)
Formula
Na2Te3
Structure
Description
White crystals.
Uses
In diagnostic medical microbiology, and as pesticide (former use) tellurium compound.

Registry Numbers and Inventories.
CAS
10102-20-2
EC (EINECS/ELINCS)
233-268-4
RTECS
WY2450000
RTECS class
Mutagen; Human Data
UN (DOT)
3284
Merck
12,8834
Beilstein/Gmelin
30332 (G)
Canada DSL/NDSL
NDSL
US TSCA
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
Na2O3Te
Formula mass
221.57
Melting point, °C
710
Solubility in water
slightly soluble in cold water

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Avoid inhalation and skin contact.
Stability
No data.

Fire.
Fire fighting
Use method most appropriate to fight surrounding fire.
Fire potential
Non-Combustible
Hazards
When heated to decomposition, it emits toxic fumes of tellurium and sodium monoxide.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s)
OSHA: PEL (8 h TWA): 0.1 mg/m3.
Exposure effects
Tellurium inhibits sweating. Sodium tellurite induced significant reduced body temperature in experimental animals. Headache and drowsiness have been seen after human exposure to tellurium compounds. Malaise, weakness, lassitude and dizziness have also occurred. No reproductive data were found for sodium tellurite. Tellurium compounds have been teratogenic in experimental animals.
   Ingestion
Anorexia, nausea, vomiting, garlicky odor, metallic taste, and constipation have occurred from exposure to tellurium compounds. The garlic odor may occur from other routes of exposure besides ingestion.
   Inhalation
Irritation, pulmonary edema, respiratory depression, and death have been noted in experimental animals exposed to various tellurium compounds by inhalation. Similar effects have not been seen in isolated human exposures.
   Skin
Avoid any skin contact. See Inhalation.
   Eyes
Dry mouth and throat have also been seen after exposure to this compound. Hair loss occurred in one case of acute intoxication from tellurium-contaminated meat.

First aid
 
   Ingestion
Do not induce emesis. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
   Skin
Remove and isolate contaminated clothing and shoes. Remove material from skin immediately. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.
UN number
3284
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
USCG CHRIS Code
STL