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CAS 520-18-3

CAS 520-18-3 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 520-18-3
CAS 520-18-3PubChem CID 5280863

Kaempferol

Kaempferol is a tetrahydroxyflavone in which the four hydroxy groups are located at positions 3, 5, 7 and 4'. Acting as an antioxidant by reducing oxidative stress, it is currently under consideration as a possible cancer treatment. It has a role as a geroprotector, an antibacterial agent, a plant metabolite, a human xenobiotic metabolite, a human urinary metabolite and a human blood serum metabolite. It is a member of flavonols, a tetrahydroxyflavone and a 7-hydroxyflavonol. It is a conjugate acid of a kaempferol oxoanion. — ChEBI

IUPAC name
3,5,7-trihydroxy-2-(4-hydroxyphenyl)chromen-4-one
Molecular formula
C15H10O6
Molecular weight
286.24 g/mol
Exact mass
286.04773803 Da
XLogP3
1.9
Topological polar surface area
107.0 Ų
Hydrogen-bond donors
4
Hydrogen-bond acceptors
6
Covalent units
1
Defined stereocentres
0

Also known as

KaempherolRobigeninRhamnoluteinPopulnetinTrifolitinIndigo YellowPelargidenolonRhamnolutin
16 more reported names
KempferolSwartziol3,4',5,7-TetrahydroxyflavoneNimbecetin3,5,7-Trihydroxy-2-(4-hydroxyphenyl)-4H-chromen-4-oneCampherolKampferolKampherolKaemferol5,7,4'-TrihydroxyflavonolPelargidenolon 14973,5,7-Trihydroxy-2-(4-hydroxyphenyl)-4H-1-benzopyran-4-oneC.I. 756404H-1-Benzopyran-4-one, 3,5,7-trihydroxy-2-(4-hydroxyphenyl)-Flavone, 3,4',5,7-tetrahydroxy-NSC-407289
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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 520-18-3

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How CAS 520-18-3 is used on this site

CAS 520-18-3 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 520-18-3 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.