Why does CAS 55406-53-6 appear in more than one EU cosmetic annex?

A substance identified by CAS 55406-53-6 may appear in multiple EU cosmetic regulation annexes when it is subject to different conditions in different contexts — for example, restricted under Annex III with specific conditions, while also appearing in Annex IV as an approved colorant under separate entry conditions. Each entry must be reviewed individually.

How do I check if my formula contains a substance with CAS 55406-53-6?

Use the INCI Checker on CosIng Checker with INCI names, CAS numbers or EC numbers. Paste CAS 55406-53-6 to screen it directly, then review every linked annex record and supplier document.

CAS 1 record

CAS 55406-53-6

Q: How do I use CAS 55406-53-6 for compliance screening?

Cross-reference CAS 55406-53-6 against your raw material specification sheets and CoA documents. When it appears in Annex II, verify absence. When it appears in Annex III, verify that concentration limits and product type conditions are met. All annex entries sharing this CAS number are listed on this page.

CAS 55406-53-6 matches 1 EU annex record across Annex II–VI of Regulation 1223/2009.

Check this CAS number Browse annexes

Chemical identity and properties

PubChem 2D chemical structure for CAS 55406-53-6

CAS 55406-53-6PubChem CID 62097

3-Iodo-2-propynyl butylcarbamate

3-iodoprop-2-yn-1-yl butylcarbamate is a carbamate ester that is carbamic acid in which the nitrogen has been substituted by a butyl group and in which the hydrogen of the carboxy group is replaced by a 1-iodoprop-2-yn-3-yl group. A fungicide, it is used as a preservative and sapstain control chemical in wood products and as a preservative in adhesives, paints, latex paper coating, plastic, water-based inks, metal working fluids, textiles, and numerous consumer products. It has a role as a xenobiotic, an environmental contaminant and an antifungal agrochemical. It is a carbamate ester, an organoiodine compound, an acetylenic compound and a carbamate fungicide. — ChEBI

IUPAC name: 3-iodoprop-2-ynyl N-butylcarbamate

Molecular formula: C8H12INO2
Molecular weight: 281.09 g/mol
Exact mass: 280.99128 Da
XLogP3: 2.1
Topological polar surface area: 38.3 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

Iodopropynyl butylcarbamateIpbcWoodlifeTroysan KK-108A3-IODO-2-PROPYNYLBUTYLCARBAMATECaswell No. 501AButyl-3-iodo-2-propynylcarbamate3-Iodo-2-propynyl butyl carbamate

16 more reported names

603P14DHEB3-iodo-2-propyn-1-yl N-butylcarbamate3-iodoprop-2-yn-1-yl N-butylcarbamateCarbamic acid, butyl-3-iodo-2-propynyl ester3-iodoprop-2-ynyl butylcarbamate3-IPBC3-iodo-2-propynyl-butylcarbamateRefChem:502679iodopropynyl butyl carbamate259-627-5Iodocarb3-iodoprop-2-yn-1-yl butylcarbamate3-Iodo-2-propynyl N-butylcarbamateCarbamic acid, butyl-, 3-iodo-2-propynyl ester3-Iodo-2-propynyl-N-butylcarbamate1-Iodoprop-1-yn-3-yl N-n-butylcarbamate

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:83279
ChEMBL:CHEMBL1893913
EPA DTXSID:DTXSID0028038
PubMed:35435491
PubMed:33049310
PubMed:23869727
PubMed:21839199
PubMed:21788198
PubMed:21251949
PubMed:18416770
PubMed:17244082
PubMed:15261450
PubMed:14513245
PubMed:12755730
PubMed:12022126

Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 55406-53-6

1 total

Annex

Entry

IODOPROPYNYL BUTYLCARBAMATE

3-Iodo-2-propynylbutylcarbamate

a) Not to be used for children under three years of age (11) b) and c) Not to be used for children under three years of age (12)

259-627-5

Max concentration

How CAS 55406-53-6 is used on this site

CAS 55406-53-6 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 1 EU annex record shares this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 55406-53-6 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.

Frequently asked questions

A substance identified by CAS 55406-53-6 may appear in multiple EU cosmetic regulation annexes when it is subject to different conditions in different contexts. For example, a substance might be restricted under Annex III with specific conditions, and the same CAS might also appear in Annex IV as an approved colorant under separate entry conditions. Each entry must be reviewed individually.

Cross-reference the CAS number against your raw material specification sheets and CoA documents. When a CAS appears in Annex II, verify absence. When it appears in Annex III, verify that concentration limits and product type conditions are met in your formulation. All annex entries sharing this CAS number are listed above.

A CAS number is assigned by the Chemical Abstracts Service (USA) and is globally recognised. An EC number is a European Commission identifier from inventories such as EINECS, ELINCS or the NLP list. Both identifiers may appear in EU cosmetic annex entries. Some substances have both, some have only one, and some older entries may have neither.

The INCI Checker accepts ingredient names, CAS numbers and EC numbers. Check this CAS number directly, then verify the result against supplier specification sheets and every linked annex condition.

Check this CAS number

Tools & next steps

Check your formula

Scan a full INCI list, then use CAS 55406-53-6 to cross-check any supplier documents behind the matched substances.

INCI Checker

Browse annexes

Browse all EU cosmetic regulation annexes by category.

All annexes

Search by name

Search for INCI names, aliases or related identifiers that sit alongside CAS 55406-53-6 in your documentation.