Glass powder

From PyroGuide

Description: It finds only little use in pyrotechnics, where it is generally contained in striker compositions (to provide initial energy caused by friction). Glass powder is an important ingredient in safety matches.

Hazards: Glass powder, or dust, is an irritant to the lungs and eyes. The same precautions for asbestos apply. Glass powder in the lungs will cause scaring and silicosis, an incurable and painful affliction. Respirator and eyes goggles required.