Boron carbide

  • Denkaboron 1200
  • Norbide
  • Tetraboron carbide
  • Tetraboron monocarbide
Formula
CB4
Description
Black, odorless powder
Uses
An abrasive.

Registry Numbers and Inventories.
CAS
12069-32-8
EC (EINECS/ELINCS)
235-111-5
Merck
12,1374
Beilstein/Gmelin
1159184 (G)
Swiss Giftliste 1
G-9044
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C4B
Formula mass
55.26
Melting point, °C
2350
Boiling point, °C
>3500
Density
2.52 g/cm3
Solubility in water
Insoluble

Hazards and Protection.
Storage
Keep in a cool, dry location. Keep container closed when not in use.
Handling
Maintain good housekeeping procedures to prevent accumulation of dust. Use clean up methods which minimize dust generation such as vacuuming or wet cleanup. Wash thoroughly after handling and before eating or smoking and at the end of the work shift. Do not shake clothing or other items to remove dust. Use a vacuum cleaner. Avoid dust inhalation and direct skin contact. Do not ingest.
Protection
Safety glasses or goggles are necessary. Gloves are recommended when contact is likely.
Respirators
Use an appropriate NIOSH approved respirator if airborne dust concentration exceeds the appropriate PEL or TLV.
Small spills/leaks
Remove all sources of ignition. Ventilate area of spill. Clean up using methods which avoid dust generation such as vacuuming (with appropriate filter to prevent airborne dust levels which exceed the PEL or TLV). If airborne dust is generated, use an NIOSH approved respirator.
Stability
Stable
Incompatibilities
Oxidizing agents.
Decomposition
Boron oxide.

Fire.
Fire fighting
Cover burning material with an inert powder, such as dry sand or limestone, to exclude oxygen. In case the powder is in drums seal with a suitable lid. For powder fire confined to a small area, use a respirator approved for toxic dust and fumes. For a large fire involving this material, fire fighters should use self-contained breathing apparatus
Hazards
Dust may present a fire or explosion hazard under favorable conditions. However, this is not expected to be a problem under normal handling conditions.

Health.
Exposure effects
Dust inhalation may cause mild irritation of the nose and throat. Skin and eye contact may cause irritation due to abrasive action of the dust. Current scientific evidence indicates no adverse effects are likely from accidental ingestion of small amount of this material.

First aid
 
   Ingestion
If substantial quantities are swallowed dilute with a large amount of water, induce vomiting. Seek medical attention.
   Inhalation
If any pulmonary symptoms develop, (coughing, wheezing, shortness of breath, etc.) remove from exposure and seek medical attention.
   Skin
If irritation occurs, thoroughly wash affected area with mild soap and water and prevent further contact. If irritation persists, seek medical attention.
   Eyes
If contact occurs, flush with copious amounts of water. If irritation persists, seek medical attention.

Transport.