Why does CAS 98-01-1 appear in more than one EU cosmetic annex?

A substance identified by CAS 98-01-1 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 98-01-1?

Use the INCI Checker on CosIng Checker with INCI names, CAS numbers or EC numbers. Paste CAS 98-01-1 to screen it directly, then review every linked annex record and supplier document.

CAS 1 record

CAS 98-01-1

Q: How do I use CAS 98-01-1 for compliance screening?

Cross-reference CAS 98-01-1 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 98-01-1 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 98-01-1

CAS 98-01-1PubChem CID 7362

Furfural

Furfural is an aldehyde that is furan with the hydrogen at position 2 substituted by a formyl group. It has a role as a metabolite and a Maillard reaction product. It is an aldehyde and a member of furans. It is functionally related to a furan. — ChEBI

IUPAC name: furan-2-carbaldehyde

Molecular formula: C5H4O2
Molecular weight: 96.08 g/mol
Exact mass: 96.021129366 Da
XLogP3: 0.4
Topological polar surface area: 30.2 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

2-Furaldehyde2-FurancarboxaldehydeFuraldehydeFurfuraldehyde2-FormylfuranFural2-Furanaldehyde2-Furancarbonal

16 more reported names

2-Furfuraldehyde2-FurfuralFurfurylaldehydeFurolFurancarbonalFurfurolePyromucic aldehydeFurole2-Furylaldehyde2-FurylcarboxaldehydeFurale2-Furyl-methanalFurfuraleFuryl-methanalalpha-Furole2-Furylmethanal

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:34768
ChEMBL:CHEMBL189362
EPA DTXSID:DTXSID1020647
PubMed:38598786
PubMed:33358762
PubMed:23449869
PubMed:23109889
PubMed:23075786
PubMed:23021959
PubMed:23018110
PubMed:22980802
PubMed:22980108
PubMed:22980107
PubMed:22978227
PubMed:22952687

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 98-01-1

1 total

Annex

III

Entry

312

FURFURAL

2-Furaldehyde

202-627-7

Max concentration CMR

How CAS 98-01-1 is used on this site

CAS 98-01-1 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 98-01-1 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 98-01-1 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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