Official EU label nameGlossary entry 13898

ISOQUERCETIN

This record confirms an official common ingredient name for EU cosmetic product labelling. It does not by itself confirm that the substance is permitted, unrestricted or safe.

Global evidence snapshot

The resolved identity has matching regulatory evidence in 0 of 13 indexed market datasets: 0 country records and 0 EU Annex records. Every result and evidence gap is listed below.

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Resolved identifiers

Resolved substance identity

CAS:482-35-9

Ingredient index records:

ISOQUERCETIN

Cosmetic functions: ANTIOXIDANT

4H-1-Benzopyran-4-one, 5,7-dihydroxy-2-(3,4-dihydroxyphenyl)-3-(beta-D-glucopyranosyloxy)-

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1 matched or reported name

ISOQUERCETIN

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name ISOQUERCETIN.

That is a statement about this inventory, not about the law: no imported rule is not evidence that a substance is permitted. A rule may exist under a different name, under a CAS or EC number this glossary entry does not carry, or in a dataset not yet imported.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 482-35-9

CAS 482-35-9PubChem CID 5280804

Isoquercetin

Quercetin 3-O-beta-D-glucopyranoside is a quercetin O-glucoside that is quercetin with a beta-D-glucosyl residue attached at position 3. Isolated from Lepisorus contortus, it exhibits antineoplastic activityand has been found to decrease the rate of polymerization and sickling of red blood cells. It has a role as a geroprotector, an antioxidant, an antineoplastic agent, a histamine antagonist, a bone density conservation agent, an antipruritic drug, an osteogenesis regulator and a plant metabolite. It is a beta-D-glucoside, a tetrahydroxyflavone, a monosaccharide derivative and a quercetin O-glucoside. It is functionally related to a beta-D-glucose. It is a conjugate acid of a quercetin 3-O-beta-D-glucopyranoside(1-). — ChEBI

IUPAC name: 2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-3-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxychromen-4-one

Molecular formula: C21H20O12
Molecular weight: 464.4 g/mol
Exact mass: 464.09547607 Da
XLogP3: 0.4
Topological polar surface area: 207.0 Å²
Hydrogen-bond donors: 8
Hydrogen-bond acceptors: 12
Covalent units: 1
Defined stereocentres: 5

Also known as

HirsutrinQuercetin 3-o-glucopyranoside3-GlucosylquercetinQuercetin 3-D-glucosideQuercetol 3-monoglucosideCONTIGOSIDE BQuercetin-3-O-glucopyranosideQuercetol 3-glucoside

16 more reported names

Quercetin 3-monoglucosideQuercetin 3-beta-glucosidequercetin glucosideQuercetin-3-glucoseQuercetin 3-beta-O-glucosideRonacare isoquercetinGlucosyl-3-quercetinquercetin 3-O-beta-D-glucopyranosideIsoquercetin, (-)-6HN2PC637TUNII-6HN2PC637TNSC 115918BRN 0100989CCRIS 9340NSC-115918quercetin-3-beta-glucopyranoside

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External database identifiers

ChEBI:CHEBI:68352
ChEMBL:CHEMBL250450
EPA DTXSID:DTXSID3041110
PubMed:34443358
PubMed:22779177
PubMed:22667148
PubMed:22428237
PubMed:22413998
PubMed:21954558
PubMed:21872416
PubMed:20939277
PubMed:20839624
PubMed:20707069
PubMed:20506822
PubMed:20222420

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

Additional authoritative substance research

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Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal US EPA CompTox CTX APIs

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Official source and scope

Imported from Commission Implementing Decision (EU) 2025/1175 (dataset version EU 2025/1175). The glossary supplies common ingredient names for the ingredient list required by Article 19(1)(g); it is not an approval or safety list.

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