Sodium tungstate

  • Disodium wolframate
Formula
Na2WO4
Structure
Description
Odorless, white crystalline powder.
Uses
Fireproofing and waterproofing fabrics, preparing complex compd, such as phosphotungstate, silicotungstate, as a reagent for biological products, precipitant for alkaloids.

Registry Numbers and Inventories.
CAS
13472-45-2
EC (EINECS/ELINCS)
236-743-4
RTECS
YO7875000
RTECS class
Mutagen; Reproductive Effector
Merck
12,8847
Beilstein/Gmelin
15163 (G)
Swiss Giftliste 1
G-8924
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
Na2O4W
Formula mass
293.83
Melting point, °C
698
Vapor pressure, mmHg
0.0001 (1200 C)
Density
4.179 g/cm3 (20 C)
Solubility in water
42 g/L (21 C)

Hazards and Protection.
Storage
Store at 4 C. Keep container tightly closed.
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
Rubber gloves and safety goggles.
Respirators
Use NIOSH/MSHA approved respirator if needed.
Small spills/leaks
Evacuate area and ventilate. Wear protective equipment. If required, use an inert absrobent. Sweep up and place in an appropriate container for disposal. Wash contaminated surfaces.
Stability
Stable at normal temperatures.

Fire.
Fire fighting
Use water spray to disperse vapor. Use water, carbon dioxide, foam, dry chemical to extinguish fire. Wear full protective clothing and NIOSH approved self-contained breathing appraratus with full facepiece, operated in positive pressure mode.

Health.
Poison_Class
4
Exposure effects
   Ingestion
Causes irritation.
   Inhalation
Causes irritation.
   Skin
Causes irritation.
   Eyes
Causes irritation.

First aid
 
   Ingestion
The possible benefit of early removal of some ingested material by cautious gastric lavage must be weighed against potential complications of bleeding or perforation. Activated charcoal activated charcoal binds most toxic agents and can decrease their systemic absorption if administered soon after ingestion. 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
Flush with water for at least 15 minutes.
   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.