Abbreviation for Hexanitrostilbene, also called Hexanitrodiphenylethylene.
A heat resistant explosive, commonly used in deep
well charges found in the oil field or in applications
requiring the explosive to withstand significant temperatures
Molecular weight 450.24,
nitrogen content 18.67% melting point 316 °C; detonating
velocity 7000 m/s at density of 1.7 g/cc. Made in
type I and type II and grades A and B. Difference
between type I and type II is primarily the particle
HNS has a unique small diameter of 0.020
It is relatively insensitive to heat, spark, impact
and friction, yet it finds wide use as a heat resistant
booster charge for military applications.