Why does CAS 57-24-9 appear in more than one EU cosmetic annex?

A substance identified by CAS 57-24-9 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 57-24-9?

Use the INCI Checker on CosIng Checker with INCI names, CAS numbers or EC numbers. Paste CAS 57-24-9 to screen it directly, then review every linked annex record and supplier document.

CAS 1 record

CAS 57-24-9

Q: How do I use CAS 57-24-9 for compliance screening?

Cross-reference CAS 57-24-9 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 57-24-9 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 57-24-9

CAS 57-24-9PubChem CID 441071

Strychnine

Strychnine is a monoterpenoid indole alkaloid that is strychnidine bearing a keto substituent at the 10-position. It has a role as a rodenticide, an avicide, a neurotransmitter agent, a cholinergic antagonist and a glycine receptor antagonist. It is an organic heteroheptacyclic compound and a monoterpenoid indole alkaloid. It is a conjugate base of a strychnine(1+). It derives from a hydride of a strychnidine. — ChEBI

IUPAC name: (4aR,5aS,8aR,13aS,15aS,15bR)-4a,5,5a,7,8,13a,15,15a,15b,16-decahydro-2H-4,6-methanoindolo[3,2,1-ij]oxepino[2,3,4-de]pyrrolo[2,3-h]quinolin-14-one

Molecular formula: C21H22N2O2
Molecular weight: 334.4 g/mol
Exact mass: 334.168127949 Da
XLogP3: 1.9
Topological polar surface area: 32.8 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 3
Covalent units: 1
Defined stereocentres: 6

Also known as

Strychnidin-10-one(-)-StrychnineSanaseedCertoxMole deathStrychninumGopher baitGopher-gitter

16 more reported names

Boomer-ridHare-RidMouse-toxKwik-kilRo-DexRCRA waste number P108StricninaStrychnosMouse-notsH9Y79VD43JMouse-ridCHEBI:28973Dolco mouse cerealNSC-5365EPA Pesticide Chemical Code 076901Pied piper mouse seed

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:28973
ChEMBL:CHEMBL227934
EPA DTXSID:DTXSID6023600
PubMed:23024715
PubMed:22997096
PubMed:22994381
PubMed:22956842
PubMed:22930548
PubMed:22855797
PubMed:22847702
PubMed:22838192
PubMed:22824428
PubMed:22815493
PubMed:22803374
PubMed:22796078

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 57-24-9

1 total

Annex

Entry

304

Strychnine and its salts

200-319-7

How CAS 57-24-9 is used on this site

CAS 57-24-9 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 57-24-9 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 57-24-9 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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