# ISO/TS 17226:2003 — Withdrawn and superseded ISO standards For ISO/TS 17226:2003, item title is Leather — Chemical tests — Determination of formaldehyde content; status code is 9599; successor is ISO 17226-1:2008 | ISO 17226-2:2008; withdrawn / published date is 2003-08-21, recorded from its source on 2026-08-05. - **Identifier:** ISO/TS 17226:2003 _(verified: appears in the quote below)_ - **Item title:** Leather — Chemical tests — Determination of formaldehyde content _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 17226-1:2008 | ISO 17226-2:2008 - **Withdrawn / published date:** 2003-08-21 _(verified: appears in the quote below)_ ## What the source says > 31292,TS,,ISO/TS 17226:2003,Leather — Chemical tests — Determination of formaldehyde content,Cuir — Essais chimiques — Dosage du formaldéhyde,2003-08-21,1,['59.140.30'],IULTCS,9599,,"[43476,43871]","['en','fr']",9,"
ISO/TS 17226:2003 specifies two methods for the determination of free and released formaldehyde in leathers. One method is relatively simple with regard to the laboratory equipment (colorimetric method), while the other needs more sophisticated equipment (HPLC method). The HPLC method is selective and not sensitive to coloured extracts.
" ## 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 Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).