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CAS 520-33-2

CAS 520-33-2 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 520-33-2
CAS 520-33-2PubChem CID 72281

Hesperetin

Hesperetin is a trihydroxyflavanone having the three hydroxy gropus located at the 3'-, 5- and 7-positions and an additional methoxy substituent at the 4'-position. It has a role as an antioxidant, an antineoplastic agent and a plant metabolite. It is a member of 4'-methoxyflavanones, a monomethoxyflavanone, a trihydroxyflavanone and a member of 3'-hydroxyflavanones. It is a conjugate acid of a hesperetin(1-). — ChEBI

IUPAC name
(2S)-5,7-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)-2,3-dihydrochromen-4-one
Molecular formula
C16H14O6
Molecular weight
302.28 g/mol
Exact mass
302.07903816 Da
XLogP3
2.4
Topological polar surface area
96.2 Ų
Hydrogen-bond donors
3
Hydrogen-bond acceptors
6
Covalent units
1
Defined stereocentres
1

Also known as

Hesperitin3',5,7-Trihydroxy-4'-methoxyflavanone(-)-hesperetin5,7,3'-Trihydroxy-4'-methoxyflavanone(-)-(S)-hesperetinEriodictyol 4'-monomethyl etherNSC-57654FEMA NO. 4313
16 more reported names
Q9Q3D557F14H-1-Benzopyran-4-one, 2,3-dihydro-5,7-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)-, (S)-CHEBI:28230(S)-2,3-dihydro-5,7-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)-4H-1-benzopyran-4-oneFlavanone, 3',5,7-trihydroxy-4'-methoxy-4H-1-Benzopyran-4-one, 2,3-dihydro-5,7-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)-, (2S)-2,3-DIHYDRO-5,7-DIHYDROXY-2-(3-HYDROXY-4-METHOXYPHENYL)-4H-1-BENZOPYRAN-4-ONERefChem:783778208-290-2(S)-5,7-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chroman-4-oneYSO2Prestwick_908Cyanidanon 4'-methyl ether 1626(S)-HesperetinNSC 57654(2S)-5,7-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)-2,3-dihydro-4H-chromen-4-one
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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 520-33-2

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How CAS 520-33-2 is used on this site

CAS 520-33-2 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 520-33-2 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.