Why does CAS 2439-01-2 appear in more than one EU cosmetic annex?

A substance identified by CAS 2439-01-2 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 2439-01-2?

Use the INCI Checker on CosIng Checker with INCI names, CAS numbers or EC numbers. Paste CAS 2439-01-2 to screen it directly, then review every linked annex record and supplier document.

CAS 1 record

CAS 2439-01-2

Q: How do I use CAS 2439-01-2 for compliance screening?

Cross-reference CAS 2439-01-2 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 2439-01-2 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 2439-01-2

CAS 2439-01-2PubChem CID 17109

Chinomethionat

Quinomethionate is a dithioloquinoxaline that results from the formal condensation of 6-methylquinoxaline-2,3-dithiol with phosgene. It has been used as a fungicide and acaricide for the control of mites and powdery mildew on citrus, vegetables, and walnuts, but is not approved for use in the EU. It has a role as an agrochemical. It is a quinoxaline antifungal agent, a quinoxaline acaricide and a dithioloquinoxaline. — ChEBI

IUPAC name: 6-methyl-[1,3]dithiolo[4,5-b]quinoxalin-2-one

Molecular formula: C10H6N2OS2
Molecular weight: 234.3 g/mol
Exact mass: 233.99215517 Da
XLogP3: 3.1
Topological polar surface area: 93.5 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 5
Covalent units: 1
Defined stereocentres: 0

Also known as

ChinomethionateOxythioquinoxQUINOMETHIONATEMorestanForstanCetactaelateMorestaneMorestan 2

16 more reported names

Daisonet XL 21Bayer 36205JoustBayer 49646-Methyl-2,3-quinoxalinedithiol cyclic S,S-dithiocarbonateBayer ss20746-Methyl-2,3-quinoxalinedithiol cyclic dithiocarbonateBAY 362056-Methyl-2-oxo-1,3-dithio(4,5-b)quinoxalineSS 20746-Methyl-1,3-dithiolo(4,5-b)quinoxalin-2-oneBAYER-36205S,S-(6-methylquinoxaline-2,3-diyl) dithiocarbonate888OQA249RENT 25,606NSC-379587

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:34620
ChEMBL:CHEMBL1595865
EPA DTXSID:DTXSID2032342
PubMed:21870981
PubMed:21151453
PubMed:18214805
PubMed:17563885
PubMed:17512650
PubMed:16497524
PubMed:16079077
PubMed:15387888
PubMed:14756419
PubMed:14505671
PubMed:11817145

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 2439-01-2

1 total

Annex

Entry

1052

Chinomethionate

219-455-3

CMR

How CAS 2439-01-2 is used on this site

CAS 2439-01-2 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 2439-01-2 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 2439-01-2 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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