Chromium carbide

  • Trichromium dicarbide
Formula
Cr3C2
Description
Odorless gray powder.

Registry Numbers and Inventories.
CAS
12012-35-0
EC (EINECS/ELINCS)
234-576-1
UN (DOT)
3178
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C2Cr3
Formula mass
180.01
Melting point, °C
1890
Boiling point, °C
3800
Density
6.68 g/cm3 (20 C)
Solubility in water
Reacts

Hazards and Protection.
Storage
Store under dry inert gas. Protect from humidity and water. Keep container tightly sealed. Store in cool, dry conditions in well sealed containers.
Protection
Protective work clothing. Chemical protective gloves. Safety glasses or goggles.
Small spills/leaks
Ensure adequate ventilation. Keep away from ignition sources.
Stability
Decomposition will not occur if used and stored according to specifications.
Incompatibilities
Acids, bases, water/moisture.
Decomposition
Toxic metal oxide fumes, methane.

Fire.
Fire fighting
Extinguish with CO2, sand, extinguishing powder. Do not use water. Wear self-contained respirator. Wear fully protective impervious suit.
Fire potential
Contact with water releases flammable gases.
Combustion products
Toxic metal oxide fumes.
Health
1
 
Flammability
2
 
 
Reactivity
1
 

Health.
Exposure limit(s)
NIOSH PEL: 0.5 mg/m3 (as Cr)
Exposure effects
Causes irritation of eyes, skin and mucous membranes. Chromium powder, chromium (II) and chromium (III) compounds may cause nausea, diarrhea, vomiting, skin and eye irritation and pneumoconiosis. Although less likely than Cr(VI) compounds, the NTP considers all chromium to be potentially carcinogenic.

First aid
 
   Ingestion
Seek medical treatment.
   Inhalation
Supply fresh air. If required, provide artificial respiration. Keep patient warm. Seek immediate medical advice.
   Skin
Immediately wash with water and soap and rinse thoroughly. Seek immediate medical advice.
   Eyes
Rinse opened eye for several minutes under running water. Then consult a doctor.

Transport.
UN number
3178
Response guide
Hazard class
4.1
Packing Group
III