Why does CAS 479-92-5 appear in more than one EU cosmetic annex?

A substance identified by CAS 479-92-5 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 479-92-5?

Use the INCI Checker on CosIng Checker with INCI names, CAS numbers or EC numbers. Paste CAS 479-92-5 to screen it directly, then review every linked annex record and supplier document.

CAS 1 record

CAS 479-92-5

Q: How do I use CAS 479-92-5 for compliance screening?

Cross-reference CAS 479-92-5 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 479-92-5 matches 1 EU annex record across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 479-92-5

CAS 479-92-5PubChem CID 3778

Propyphenazone

Propyphenazone is a pyrazolone derivative that is antipyrine substituted at C-4 by an isopropyl group. It has a role as a non-steroidal anti-inflammatory drug, a non-narcotic analgesic and a peripheral nervous system drug. It is functionally related to an antipyrine. — ChEBI

IUPAC name: 1,5-dimethyl-2-phenyl-4-propan-2-ylpyrazol-3-one

Molecular formula: C14H18N2O
Molecular weight: 230.31 g/mol
Exact mass: 230.141913202 Da
XLogP3: 1.7
Topological polar surface area: 23.6 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

isopropylantipyrine4-IsopropylantipyrineIsopropylphenazonePropifenazonaYoshipyrinPropifenazonePropyphenazonum1-Phenyl-2,3-dimethyl-4-isopropyl-3-pyrazolin-5-one

16 more reported names

1-Phenyl-2,3-dimethyl-4-isopropylpyrazol-5-one4-Isopropyl-2,3-dimethyl-1-phenyl-3-pyrazolin-5-oneOED8FV75PY3H-Pyrazol-3-one, 1,2-dihydro-1,5-dimethyl-4-(1-methylethyl)-2-phenyl-CHEBI:1355384-Isopropyl-1,5-dimethyl-2-phenyl-1,2-dihydro-pyrazol-3-one1,5-dimethyl-2-phenyl-4-(propan-2-yl)-1,2-dihydro-3H-pyrazol-3-one1,5-dimethyl-4-(1-methylethyl)-2-phenyl-1,2-dihydro-3H-pyrazol-3-one4-isopropyl-2,3-dimethyl-1-phenyl-3-pyrazoline-5-oneRefChem:869873N02BB04207-539-2Isopropyl PhenazonepropylphenazoneIsopropyrineIsopropylantipyrin

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:135538
ChEMBL:CHEMBL28318
EPA DTXSID:DTXSID6023529
PubMed:22864932
PubMed:22858460
PubMed:22548206
PubMed:22381982
PubMed:22191375
PubMed:22148095
PubMed:22076942
PubMed:21946858
PubMed:21684706
PubMed:21491880
PubMed:21453539
PubMed:21370398

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 479-92-5

1 total

Annex

Entry

138

Propyphenazone (INN)

207-539-2

How CAS 479-92-5 is used on this site

CAS 479-92-5 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 479-92-5 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 479-92-5 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.

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Tools & next steps

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