Sodium selenate

  • Disodium selenate
Formula
Na2SeO4
Structure
Description
Colorless rhombic crystals.
Uses
Insecticide in some horticultural applications.

Registry Numbers and Inventories.
CAS
13410-01-0
EC (EINECS/ELINCS)
236-501-8
RTECS
VS6650000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Reproductive Effector; Human Data
UN (DOT)
3283
Merck
12,8820
Beilstein/Gmelin
533054 (G)
EPA OPP
72002
Swiss Giftliste 1
G-2616
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
Na2O4Se
Formula mass
188.93
Density
3.098 g/cm3 (20 C)

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 breathing dust. Keep unnecessary people away; isolate hazard area and deny entry. Stay upwind; keep out of low areas. Do not touch spilled material; stop leak if you can do so without risk. Small spills: absorb with sand or other noncombustible absorbent material and place into containers for later disposal. Small dry spills: with clean shovel place material into clean, dry container and cover; move containers from spill area. Large spills: dike far ahead of spill for later disposal.
Stability
No data.

Fire.
Fire fighting
Stay upwind; keep out of low areas. Wear self-contained (positive pressure if available) breathing apparatus and full protective clothing.Extinguish fire with dry chemical, carbon dioxide, water spray, fog, or foam. Move container from fire area if it can be done without risk.
Fire potential
Non-Combustible
Hazards
Fire may produce irritating or poisonous gas. Emits toxic selenium and sodium oxide fumes when heated to decomposition. Avoid decomposing heat.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s)
OSHA: PEL (8 h TWA): 0.2 mg/m3.
Poison_Class
1
Exposure effects
Dizziness, CNS depression, restlessness, sluggish pupillary reflexes, clouding of the sensorium, and coma have all been noted with selenium toxicity. Selenite toxicity may include a lightheaded sensation. Inhalation of selenium dusts can cause headache. Acute ingestion of sodium selenate by an adolescent caused irritability. Selenium readily crosses the placenta; maternal and fetal levels are similar at term.
   Ingestion
Effects include nausea, vomiting, salivation, and gastrointestinal pain. A garlic odor on the breath may occur. Acute ingestion of sodium selenate caused a garlic odor of the breath and diarrhea.
   Inhalation
Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin. Effects of contact or inhalation may be delayed.
   Skin
Selenium compounds may cause dermatitis. Selenite toxicity may include facial flushing.
   Eyes
See Inhalation.

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 patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   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
Immediately flush with running water for at least 20 minutes.

Transport.
UN number
3283
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
USCG CHRIS Code
SSL