# ISO 22241-4:2019 — Withdrawn and superseded ISO standards

For ISO 22241-4:2019, item title is Diesel engines — NOx reduction agent AUS 32 — Part 4: Refilling interface; status code is 9599; successor is ISO 22241-4:2023; withdrawn / published date is 2019-07-12, recorded from its source on 2026-08-05.

- **Identifier:** ISO 22241-4:2019 _(verified: appears in the quote below)_
- **Item title:** Diesel engines — NOx reduction agent AUS 32 — Part 4: Refilling interface _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 22241-4:2023
- **Withdrawn / published date:** 2019-07-12 _(verified: appears in the quote below)_

## What the source says

> 66411,IS,,ISO 22241-4:2019,Diesel engines — NOx reduction agent AUS 32 — Part 4: Refilling interface,Moteurs diesel — Agent AUS 32 de réduction des NOx — Partie 4: Interface de remplissage,2019-07-12,2,['43.060.40'],ISO/TC 22/SC 34,9599,[42941],[82284],['en'],13,"<p>This document specifies the refilling interface for the NOx reduction agent AUS 32 in conformance with ISO 22241‑1, which is needed to operate converters with a selective catalytic reduction (SCR) exhaust treatment system.</p><p>This document specifies the minimum functional and geometric requirements of an open refilling system, in order to ensure compatibility between the on-board refilling system and the off-board refilling sy

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).