Monoammonium phosphate, ABC Dry Chemical, ABC Powder, tri-class, or multi-purpose dry chemical is a dry chemical extinguishing agent used on class A, class B, and class C fires. It uses a specially fluidized and siliconized monoammonium phosphate powder.[1] ABC dry chemical is usually a mix of monoammonium phosphate and ammonium sulfate, the former being the active component. The mix between the two agents is usually 40–60%, 60–40%, or 90–10% depending on local standards worldwide. The USGS uses a similar mixture, called Phos Chek G75F.[2]
- ^ The Assessment of Fire Suppression Capability for the Ammonium Dihydrogen Phosphate Dry Powder of Commercial Fire Extinguishers. Chung-Hwei Su, Chan-Cheng Chen, Horng-Jang Liaw, Shiuan-ChengWang. Procedia Engineering Volume 84, 2014, Pages 485-490
- ^ "Ecological Effects of Fire Retardant Chemicals and Fire Suppressant Foams". Archived from the original on 2007-08-18. Retrieved 2011-02-16.