What is a safety match made from?

Question

i need to get this answer by late tomorrow afternoon.

Answer 1

Their safety is due to the separation of the combustible ingredients between a match head on the end of a paraffin-impregnated splint and a special striking surface; and the replacement of white phosphorus with red phosphorus. The striking surface is composed of typically 25% powdered glass, 50% red phosphorus, 5% neutralizer, 4% carbon black and 16% binder; and the match head is typically composed of 45-55% potassium chlorate, with a little sulphur and starch, a neutralizer (ZnO or CaCO3), 20-40% of siliceous filler, diatomite and glue.[5] Some heads contain antimony(III) sulfide so they burn more vigorously. Safety matches ignite due to the extreme reactivity of phosphorus with the potassium chlorate in the match head. When the match is struck the phosphorus and chlorate mix in a small amount forming something similar to the explosive Armstrong's mixture which ignites due to the friction.

Answer 2

Safety matches are 'safe' because they don't spontaneously combust. You have to strike them against a special surface in order to get them to ignite. The match heads contain sulfur (sometimes antimony III sulfide) and oxidizing agents (usually potassium chlorate), with powdered glass, colorants, fillers, and a binder made of glue and starch. The striking surface consists of powdered glass or silica (sand), red phosphorus, binder, and filler. When you strike a safety match, the glass-on-glass friction generates heat, converting a small amount of red phosphorus to white phosphorus vapor. White phosphorus spontaneously ignites, decomposing potassium chlorate and liberating oxygen. At this point, the sulfur starts to burn, which ignites the wood of the match.