Sodium selenite

Formula
Na2SeO3
Structure
Description
A white colored crystalline solid.
Uses
Removing green color from glass during its mfr, alkaloidal reagent.

Registry Numbers and Inventories.
CAS
10102-18-8
EC (EINECS/ELINCS)
233-267-9
EC Index Number
015-185-00-3
RTECS
VS7350000
RTECS class
Tumorigen; Mutagen; Reproductive Effector; Human Data
UN (DOT)
2630
Merck
12,8822
Beilstein/Gmelin
198696 (G)
RCRA
D010
Swiss Giftliste 1
G-2617
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
H10Na2O8Se
Formula mass
172.93
Melting point, °C
710
Decomposition point, °C
710
Vapor density (air=1)
5.96
Density
3.1 g/cm3 (20 C)
Solubility in water
Very soluble

Hazards and Protection.
Storage
Store in a cool, dry place. Keep container closed when not in use.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Incompatible with strong acids.
Decomposition
Toxic fumes of sodium oxide, selenium/selenium oxides.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.
Fire potential
Nonflammable.
Hazards
May burn but will not ignite readily. When heated to decomposition, may emit toxic fumes of selenium and sodium oxide. Stable in air.
Combustion products
Toxic gases and vapors may be released in a fire involving.
Health
3
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
TLV (as Se): ppm; 0.2 mg/m3 (ACGIH 1991-1992).
Poison_Class
1
Exposure effects
May cause reproductive and fetal effects. Chronic exposure to selenium may cause central nervous system effects, digestive tract disturbances, pallor, garlic breath,
   Ingestion
May be fatal if swallowed. Poison by ingestion. Causes gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
Causes respiratory tract irritation. Irritation may lead to chemical pneumonitis and pulmonary edema.
   Skin
Causes skin irritation. May be absorbed through the skin in harmful amounts. Chronic exposure to selenium may cause central nervous system effects, digestive tract disturbances, pallor, garlic breath,
   Eyes
Causes severe eye irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
2630
Response guide
Hazard class
6.1
Packing Group
I
 
USCG CHRIS Code
SSE
 
Std. Transport #
4923451