Zirconium boride
Agent Name
Zirconium boride
CAS Number
12045-64-6
Formula
B2-Zr
Major Category
Metals
Synonyms
Zirconium boride (ZrB2); Zirconium diboride; [ChemIDplus]
Category
Metals, Inorganic Compounds
Description
Grey solid; [Hawley] Powder; [MSDSonline]
Sources/Uses
Used as a refractory material (aircraft and rockets), high-temperature electrical conductor, and cutting tool coating; [Hawley] Used as a diffusion barrier in semiconductors, a refractory material for molten metals, and an absorbent in nuclear reactors; [Ullmann]
Comments
Highly flammable; An irritant; [MSDSonline] See "Boron" and "Zirconium."
Biomedical References
Exposure Assessment
TLV (ACGIH)
5 mg/m3, as Zr
STEL (ACGIH)
10 mg/m3, as Zr
PEL (OSHA)
5 mg/m3, as Zr (compounds)
MAK
1 mg/m3, inhalable fraction (metal and insol. cmpds.)
IDLH (NIOSH)
25 mg/m3, as Zr
Diseases, Processes, and Activities Linked to This Agent
Processes
Industrial Processes with risk of exposure: