Allen chlorate flash #6

Composition

40  
Aluminium (dark pyro)
30  
Sulfur

Description

DANGER: Chlorate flash mixtures decompose faster than perchlorate flash mixtures and are more sensitive to shock, flame, spark and friction.

DANGER: Chlorate and sulfur/sulfide mixes are known to be very sensitive to shock, flame, spark and friction.

Source: 
Allen