Silicon nitride (Si3N4)

Formula
Si3N4
Structure
Description
gray refractory solid, hexagonal
Uses
Used as a high temp engineering material for use in gas turbines, diesel engines.

Registry Numbers and Inventories.
CAS
12033-89-5
EC (EINECS/ELINCS)
234-796-8
Merck
12,8641
Beilstein/Gmelin
6509 (G)
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
N4Si3
Formula mass
140.28
Melting point, °C
1900
Density
3.17 g/cm3 (20 C)
Thermal expansion
3E-06/K

Hazards and Protection.

Fire.

Health.
Exposure effects
The toxicological properties of this material have not been investigated. Use appropriate procedures to prevent opportunities for direct contact with the skin or eyes and to prevent inhalation.

First aid
 

Transport.