Chromium(III) boride

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Chromium(III) boride
IUPAC name
Chromium(3+) boride
EC Number 234-487-8
Jmol interactive 3D Image
PubChem 82788
Molar mass 62.81 g/mol
Appearance silver, ceramic material
Density 6.17 g/cm3
Melting point 1,950 to 2,050 °C (3,540 to 3,720 °F; 2,220 to 2,320 K)
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 0: Exposure under fire conditions would offer no hazard beyond that of ordinary combustible material. E.g., sodium chloride Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
US health exposure limits (NIOSH):
TWA 1 mg/m3[1]
TWA 0.5 mg/m3[1]
250 mg/m3[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Chromium(III) boride is an inorganic compound with the chemical formula CrB.[2] It is used in wear resistant coatings.


  1. ^ a b c "NIOSH Pocket Guide to Chemical Hazards #0141". National Institute for Occupational Safety and Health (NIOSH). 
  2. ^ Peshev, P.; Bliznakov, G.; Leyarovska, L. (1967). "On the preparation of some chromium, molybdenum and tungsten borides". Journal of the Less Common Metals 13 (2): 241. doi:10.1016/0022-5088(67)90188-9.