CosIng Checker
CosIng Checker
EU cosmetic ingredients, restrictions and safety
Login
CAS 0 records

CAS 117746-18-6/517-88-4/517-89-5

CAS 117746-18-6/517-88-4/517-89-5 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

Check this CAS numberBrowse annexes

Chemical identity and properties

PubChem 2D chemical structure for CAS 517-88-4
CAS 517-88-4PubChem CID 72521

Alkannin

IUPAC name
5,8-dihydroxy-2-[(1S)-1-hydroxy-4-methylpent-3-enyl]naphthalene-1,4-dione
Molecular formula
C16H16O5
Molecular weight
288.29 g/mol
Exact mass
288.09977361 Da
XLogP3
3.0
Topological polar surface area
94.8 Ų
Hydrogen-bond donors
3
Hydrogen-bond acceptors
5
Covalent units
1
Defined stereocentres
1

Also known as

AnchusinAlkanna RedAnchusa acid075CRZ9995NSC-945245,8-dihydroxy-2-[(1S)-1-hydroxy-4-methyl-pent-3-enyl]naphthalene-1,4-dione5,8-dihydroxy-2-((1S)-1-hydroxy-4-methyl-pent-3-enyl)naphthalene-1,4-dione5,8-dihydroxy-2-((1S)-1-hydroxy-4-methylpent-3-enyl)naphthalene-1,4-dione
16 more reported names
RefChem:554083208-245-7(-)-AlkanninAlkannin (VAN)Anchusin (VAN)Alkanna red (VAN)Anchusa acid (VAN)(S)-5,8-Dihydroxy-2-(1-hydroxy-4-methylpent-3-en-1-yl)naphthalene-1,4-dioneCHEBI:2578(S)-5,8-Dihydroxy-2-(1-hydroxy-4-methylpent-3-enyl)-1,4-naphthoquinoneE1035,8-dihydroxy-2-[(1S)-1-hydroxy-4-methylpent-3-en-1-yl]-1,4-dihydronaphthalene-1,4-dioneC.I. Natural Red 20 (VAN)Cerven prirodni 20Cerven prirodni 20 [Czech]UNII-075CRZ9995
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

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

PubChem 2D chemical structure for CAS 517-89-5
CAS 517-89-5PubChem CID 479503

Shikonin

Shikonin is a hydroxy-1,4-naphthoquinone. — ChEBI

IUPAC name
5,8-dihydroxy-2-[(1R)-1-hydroxy-4-methylpent-3-enyl]naphthalene-1,4-dione
Molecular formula
C16H16O5
Molecular weight
288.29 g/mol
Exact mass
288.09977361 Da
XLogP3
3.0
Topological polar surface area
94.8 Ų
Hydrogen-bond donors
3
Hydrogen-bond acceptors
5
Covalent units
1
Defined stereocentres
1

Also known as

Isoarnebin 4ShikonineTokyo Violet(R)-(+)-Shikonin(+)-ShikoninNSC 252844CCRIS 64923IK6592UBW
16 more reported names
(+)-5,8-Dihydroxy-2-(1-hydroxy-4-methyl-3-pentenyl)-1,4-naphthoquinoneC.I. 755351,4-Naphthalenedione, 5,8-dihydroxy-2-(1-hydroxy-4-methyl-3-pentenyl)-, (R)-1,4-NAPHTHOQUINONE, 5,8-DIHYDROXY-2-(1-HYDROXY-4-METHYL-3-PENTENYL)-, (+)-NSC-2528441,4-naphthalenedione, 5,8-dihydroxy-2-((1r)-1-hydroxy-4-methyl-3-pentenyl)-1,4-Naphthalenedione, 5,8-dihydroxy-2-[(1R)-1-hydroxy-4-methyl-3-pentenyl]-5,8-dihydroxy-2-((1R)-1-hydroxy-4-methyl-3-penten-1-yl)-1,4-naphthalenedione5,8-DIHYDROXY-2-((1R)-1-HYDROXY-4-METHYLPENT-3-ENYL)NAPHTHALENE-1,4-DIONE5,8-Dihydroxy-2-[(1R)-1-hydroxy-4-methyl-3-penten-1-yl]-1,4-naphthalenedioneshikonin, (+)-RefChem:487985,8-dihydroxy-2-(1-hydroxy-4-methyl-3-pentenyl)-1,4-naphthalenedione610-730-71,4-naphthalenedione, 5,8-dihydroxy-2-((1R)-1-hydroxy-4-methyl-3-penten-1-yl)-2-((1R)-1-hydroxy-4-methyl-3-pentenyl)-5,8-dihydroxy-1,4-naphthoquinone
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

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 117746-18-6/517-88-4/517-89-5

0 total
No records found for this CAS number.

How CAS 117746-18-6/517-88-4/517-89-5 is used on this site

CAS 117746-18-6/517-88-4/517-89-5 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 0 EU annex records share 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 117746-18-6/517-88-4/517-89-5 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.