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ISO/FDIS 22241-1

Diesel engines — NOx reduction agent AUS 32 — Part 1: Quality requirements

General information

50.00     Apr 16, 2026

ISO

ISO/TC 22/SC 34

International Standard

43.060.40  

Scope

This document specifies the quality characteristics of the NOx reduction agent AUS 32 (aqueous urea solution) which is needed to operate selective catalytic reduction (SCR) converter systems in motor vehicles with diesel engines. SCR converter systems are particularly suitable for selectively reducing the nitrogen oxide (NOx) emissions of diesel engines.

Life cycle

PREVIOUSLY

PUBLISHED
ISO 22241-1:2019

PUBLISHED
ISO 22241-1:2019/Amd 1:2019

NOW

IN_DEVELOPMENT
ISO/FDIS 22241-1
50.00 Final text received or FDIS registered for formal approval
Apr 16, 2026