# ISO 17168-4:2018 — Withdrawn and superseded ISO standards

For ISO 17168-4:2018, item title is Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for air-purification performance of semiconducting photocatalytic materials under indoor lighting environment — Part 4: Removal of formaldehyde; status code is 9599; successor is ISO 17168-4:2025; withdrawn / published date is 2018-09-19, recorded from its source on 2026-08-05.

- **Identifier:** ISO 17168-4:2018 _(verified: appears in the quote below)_
- **Item title:** Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for air-purification performance of semiconducting photocatalytic materials under indoor lighting environment — Part 4: Removal of formaldehyde _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 17168-4:2025
- **Withdrawn / published date:** 2018-09-19 _(verified: appears in the quote below)_

## What the source says

> 64036,IS,,ISO 17168-4:2018,"Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for air-purification performance of semiconducting photocatalytic materials under indoor lighting environment — Part 4: Removal of formaldehyde",Titre manque — Partie 4: Titre manque,2018-09-19,1,['81.060.30'],ISO/TC 206,9599,,[89188],['en'],11,"<p>This document specifies a test method for the determination of the air-purification performance, with regards to the removal of formaldehyde, of materials that contain a photocatalyst or have photocatalytic films on the surface, usually made from semiconducting metal oxides such as titanium dioxide or other ceramic materials, by continuous expo

## 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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).