Chromium(III) boride

Chromium(III) boride
Names
IUPAC name
boranylidynechromium
Other names
Chromium monoboride
Identifiers
12006-79-0
3D model (Jmol) Interactive image
ChemSpider 74710
ECHA InfoCard 100.031.339
EC Number 234-487-8
PubChem 82788
Properties
CrB
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)
insoluble
Structure
orthorhombic
Hazards
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
0
0
0
US health exposure limits (NIOSH):
PEL (Permissible)
 TWA 1 mg/m3[1]
REL (Recommended)
 TWA 0.5 mg/m3[1]
IDLH (Immediate danger)
 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.

References

  1. 1 2 3 "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.
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