Abstract: A foam concentrate provides a fire-fighting composition when mixed with water so that the fire-fighting composition does not form a stable seal on cyclohexane and meets UL 162, Class B performance criteria for at least one of AFFF agents and fluoroprotein (FP) agents without requiring organic fluorine. The concentrate is formed from water and a high molecular weight acidic polymer (HMWAP) and a coordinating salt.

Abstract: A fire extinguishing material that comprises a particulate material to be projected onto a fire having a particle size of no more that 212 microns, a moisture content of no more than 0.50 parts by weight, a hygroscopicity of no more than 3.00 parts by weight, and a bulk density of about 125 milliliters per 100 grams. The particulate material consists essentially of from about 40 to about 80 parts by weight monoammonium phosphate, from about 32 to 0 parts by weight ammonium sulfate, from about 10 to about 18 parts by weight of one or more carbonates selected from the group consisting essentially of magnesium carbonate, potassium carbonate and calcium carbonate, from about 0 to 15 parts by weight of barium sulfate, about 2.0 parts by weight hydrated aluminum-magnesium silicate, about 0.04 parts by weight of diarylide yellow, and about 0.8 parts by weight of methylhydrogen siloxane.