(blasting powder). A low explosive composed of potassium nitrate, charcoal, and sulfur. In some cases sodium nitrate is substituted for potassium nitrate. Typical proportions are 75%, 15%, and 10%. Gunpowder is probably the oldest variety.
Hazard:
Sensitive to heat, deflagrates rapidly. Does not detonate but is a dangerous fire and explosion hazard.
Use:
Time fuses for blasting and shell, in igniter and primer assemblies for propellants, pyrotechnics, mining, and blasting.