MOLYBDENUM BORIDE Property

Melting point:

1600°C

Density 

7480 (ρ/kg.m–3)

form 

refractory hexagonal crystals

color 

refractory hexagonal, hexane crystals, crystalline

Resistivity

25–55 (ρ/μΩ.cm)

Crystal Structure

Trigonal

EPA Substance Registry System

Molybdenum boride (Mo2B5) (12007-97-5)

Safety

Safety Statements 

22-24/25

Toxicity

mouse,LD50,intraperitoneal,1377mg/kg (1377mg/kg),LIVER: OTHER CHANGES,Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 9(6), Pg. 40, 1965.

Hazard and Precautionary Statements (GHS)

MOLYBDENUM BORIDE Chemical Properties,Usage,Production

Chemical Properties

refractory material; borides used as a braze to join molybdenum, tungsten, and tantalum, and niobium parts for electronic, corrosion, and abrasion protection, used as a sputtering target with 99.5% purity to produce films which may be wear-resistant and semiconducting [CER91] [HAW93] [KIR78]

Physical properties

Corroded by molten metals Al, Mg, V, Cr, Mn, Fe, Ni, Cu, Nb, Mo, and Ta; corrosion resistant to molten Cd, Sn, Bi, and Rb

Uses

Brazes to join molybdenum, tungsten, tanta-lum, and niobium parts, especially electronic com-ponents, corrosion and abrasion-resistant parts, cut-ting tools, refractory cermets.

Safety Profile

Poison by intratracheal route. Moderately toxic by ingestion and intraperitoneal routes. When heated to decomposition it emits toxic fumes of boron and Mo.