Tungsten carbide

  • Ditungsten monocarbide
Formula
W2C
Description
Black powder or chunks. Odorless.

Registry Numbers and Inventories.
CAS
12070-13-2
EC (EINECS/ELINCS)
235-124-6
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
CW2
Formula mass
379.71
Melting point, °C
2860
Boiling point, °C
6000
Density
17.2 g/cm3 (20 C)
Solubility in water
Insoluble

Hazards and Protection.
Storage
Store in a tightly sealed container in a cool, dry, well-ventilated area. Wash thoroughly after handling.
Protection
Protective work clothing. Chemical protective gloves. Safety glasses or goggles.
Respirators
NIOSH approved dust, mist, vapor cartridge respirator.
Small spills/leaks
Wear appropriate respiratory and protective equipment specified in Section VIII. Isolate spill area and provide ventilation. Vacuum up spill using a high efficiency particulate absolute (HEPA) air filter and place in a closed container for proper disposal. Take care not to raise dust.
Stability
Stable at normal temperatures and pressures.
Incompatibilities
May have a violent reaction with chlorine, fluorine, nitrogen dioxide, nitrous oxide, iodine pentafluoride and lead oxide.
Decomposition
May oxidize on heating in air.

Fire.
Fire fighting
Use suitable extinguishing media for surrounding materials and type of fire. must wear full face, self-contained breathing apparatus with full protective clothing to prevent contact with skin and eyes.
Fire potential
Not flammable.
Combustion products
Metal oxide fumes.
Health
3
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
OSHA PEL: 5 mg/m3 (as W)
Exposure effects
   Ingestion
May cause irritation to the gastrointestinal tract and diarrhea.
   Inhalation
Toxic by inhalation. May cause irritation to the mucous membranes, coughing, dyspnea, soreness in the chest, weight loss, hemoptysis, bronchitis, asthma, pulmonary fibrosis and radiological changes in the lungs.
   Skin
May cause irritation, dermatitis, sensitization and eczema.
   Eyes
May cause irritation and conjunctivitis.

First aid
 
   Ingestion
If conscious, give 1-2 glasses of milk or water and induce vomiting (Never induce vomiting or give anything by mouth to an unconscious person). Seek medical attention.
   Inhalation
Remove victim to fresh air. Keep warm and quiet, give oxygen if breathing is difficult and seek medical attention.
   Skin
Remove contaminated clothing from affected area, brush material off skin. Wash affected area with mild soap and water. Seek medical attention if symptoms persist.
   Eyes
Flush eyes with lukewarm water, lifting upper and lower eyelids, for at least 15 minutes. Seek medical attention if symptoms persist.

Transport.