ISO Flame Retardant codes updated

ISO 1043 part 4 has been updated defining more precise code numbers for nitrogen and organo-phosphorus FRs. ISO 1043-4 previously gave codes only for “Nitrogen” and “Organo-phosphorus” flame retardant compounds.

For Nitrogen compounds, the current two codes become six: melamine, urea, monomeric melamine-based compounds (melamine salts), polymeric melamine-based compounds, N-alkoxy hindered amine-based compounds, other nitrogen-based compounds.
For Organo-phosphorus, the current three codes become five: aryl phosphates, chlorinated organic phosphorus compounds, brominated organic phosphorus compounds, methyl esters of phosphoric or phosphonic acid, other halogen-free organic phosphorus compounds.

ISO 1043-4 (2021) “Plastics – symbols and abbreviated terms – part 4: flame retardants”, Amdt. 1:2026, available in English for e.g. 7.00 € from the Estonia standards organisation website www.evs.ee