Historical
ISO 22241-1:2006
Diesel engines - NOx reduction agent AUS 32 - Part 1: Quality requirements
ISO 22241-1:2006 specifies the quality characteristics of the NOx reduction agent AUS 32 (aqueous urea solution) which is needed to operate converters with selective catalytic reduction, so-called SCR (Selective Catalytic Reduction) converters, in motor vehicles with diesel engines. SCR converters are particularly suitable for selectively reducing the nitrogen oxide (NOx) emissions of diesel engines.
International Organization for Standardization [iso]