Chlorine Warning

According to National Fire Protection Associations, NFPA 10 "Standard for Portable Fire Extinguishers 2002 Edition", Annex H Conditions of Selection, Section H.2 Health and Safety Conditions That Affect Selection, sub listing (5) "Dry chemical fire extinguisher containing ammonium compounds should not be used on oxidizers that contain chlorine. The reaction between the oxidizer and the ammonium salts can produce an explosive compound (NCL3)"

Definition

NCL3- Nitrogen Trichloride, also called nitrogen chloride, agene, chlorine nitride, trichloramine, trichlorine nitride, chloride of azode, or Stickstofftrichlorid, is an unstable primary explosive compound. Nitrogen trichloride will explode if heated, exposed to sunlight, or mixed with organic compounds. It does not like to be friendly around many other chemicals, shock, sparks, and it will explode if frozen and thawed. The explosive properties were first reported in the 18th century by Sir H. Davy, he had this to say: "The fulminating oil which you mentioned roused my curiosity and nearly deprived me of an eye. After some months of confinement I am again well."