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Dyes and pigments

Isorhamnetin

Also known as 3-Methylquercetin, Isorhamnetol, Quercetin 3'-methyl ether

CAS 480-19-3Formula C16H12O7Molar mass 316.27 g/molEC 207-545-5
GHS signal word: Warning. Pictograms: Serious health hazard 52 suppliers listed
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Isorhamnetin chemical structure, C16H12O7, CAS 480-19-3
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
480-19-3
Formula
C16H12O7
Molar mass
316.27 g/mol
EC number
207-545-5
HS code
293299
Category
Dyes and pigments

What is Isorhamnetin?

Plain description, key identifiers and synonyms

Isorhamnetin is a monomethoxyflavone that is quercetin in which the hydroxy group at position 3' is replaced by a methoxy group. It has a role as a metabolite, an anticoagulant and an EC 1.14.18.1 (tyrosinase) inhibitor. It is a monomethoxyflavone, a tetrahydroxyflavone and a 7-hydroxyflavonol. It is functionally related to a quercetin. It is a conjugate acid of an isorhamnetin(1-).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
3,5,7-trihydroxy-2-(4-hydroxy-3-methoxyphenyl)chromen-4-one
CAS number
480-19-3 CAS number cross-checked
EC number
207-545-5
Molecular formula
C16H12O7
UNII
07X3IB4R4Z
MDL number
MFCD00017310
INCI name
ISORHAMNETIN
InChIKey
IZQSVPBOUDKVDZ-UHFFFAOYSA-N
InChI
InChI=1S/C16H12O7/c1-22-11-4-7(2-3-9(11)18)16-15(21)14(20)13-10(19)5-8(17)6-12(13)23-16/h2-6,17-19,21H,1H3
SMILES (canonical and isomeric)
COC1=C(C=CC(=C1)C2=C(C(=O)C3=C(C=C(C=C3O2)O)O)O)O

Synonyms

  • 3-Methylquercetin
  • Isorhamnetol
  • Quercetin 3'-methyl ether
  • 3'-Methoxyquercetin
  • 3'-O-Methylquercetin
  • 3'-Methoxy-3,4',5,7-tetrahydroxyflavone
  • isorhamnetine
  • iso-rhamnetin
  • C.I. 75680
  • 3,5,7-trihydroxy-2-(4-hydroxy-3-methoxyphenyl)chromen-4-one
  • 3,4',5,7-Tetrahydroxy-3'-methoxyflavone
  • 3,5,7,4'-Tetrahydroxy-3'-methoxyflavone
  • Flavone, 3,4',5,7-tetrahydroxy-3'-methoxy-
  • 4H-1-Benzopyran-4-one, 3,5,7-trihydroxy-2-(4-hydroxy-3-methoxyphenyl)-
  • 3,5,7-Trihydroxy-2-(4-hydroxy-3-methoxyphenyl)-4-benzopyrone
  • 3,4',5,7-tetrahydroxy-3'-methoxy-flavone
  • 3-methyl-quercetin
  • 3,6,7-trihydroxy-2-(4-hydroxy-3-methoxy-phenyl)chromone
  • 3,5,7-Trihydroxy-2-(4-hydroxy-3-methoxyphenyl)-4H-chromen-4-one
  • 3'-O-Methyl Quercetin
  • 3,5,7-Trihydroxy-2-(4-hydroxy-3-metoxyphenyl)benzopyran-4-one
  • 3-Methylquercetine
  • Isorhamnetin (Standard)
  • Flavone, 3'-methoxy-3,4',5,7-tetrahydroxy-
  • 3,5,7-Trihydroxy-2-(4-hydroxy-3-methoxyphenyl)-4H-1-benzopyran-4-one
Show all 33 synonyms
  • 4H-1-Benzopyran-4-one, 2-(3-methoxy-4-hydroxyphenyl)-3,5,7-trihydroxy-
  • 3,5,7-trihydroxy-2-(4-hydroxy-3-methoxy-phenyl)chromen-4-one
  • isorhamntin
  • isorhmnetin
  • isorhamnosidemnetin
  • 3-methoxyquercetin
  • IRH
  • 3'-Methylquercetin (Standard)

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
316.27 g/molcalc.
Exact mass
316.0583 Dacalc.
LogP (octanol/water)
2.29calc.
Topological polar surface area
120.4 Ųcalc.
Hydrogen bond donors
4calc.
Hydrogen bond acceptors
7calc.
Rotatable bonds
2calc.
Heavy atoms
23calc.
Rings
3calc.
Aromatic rings
3calc.
Fraction sp3 carbons
0.06calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=c1cc(-c2ccccc2)oc2ccccc12

O=c1cc(-c2ccccc2)oc2ccccc12

3 rings, 17 atoms, the Flavone ring system.

2,273 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H351Suspected of causing cancer.
Precautionary statements (5)
  • P203Obtain, read and follow all safety instructions before use.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P318If exposed or concerned, get medical advice.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Isorhamnetin suppliers

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All 52 suppliers
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Where suppliers are based

52 suppliers in 11 countries

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Isorhamnetin price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Cosmetic ingredient, INCI name ISORHAMNETIN(skin protecting)

Roles

  • anticoagulant
  • enzyme inhibitor
  • hematologic agent
  • metabolite
  • pharmaceutical

Functional uses

  • Humectant

Cosmetic functions

  • Skin protecting

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Isorhamnetin is traded under.

HS 2932.99Indicative HS code

Heterocyclic compounds with oxygen hetero-atom(s) only, other

World exports in 2024
$3.81B
+10.3% vs 2023, imports $7.05B
2019 to 2024
Top exporters
  1. China28.9%
  2. Switzerland * partner reported12.7%
  3. Germany7.8%
Top importers
  1. United States49.7%
  2. China11.9%
  3. India * partner reported3.3%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Isorhamnetin is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Isorhamnetin, based on the data on this page

What is Isorhamnetin?

Isorhamnetin is a monomethoxyflavone that is quercetin in which the hydroxy group at position 3' is replaced by a methoxy group. It has a role as a metabolite, an anticoagulant and an EC 1.14.18.1 (tyrosinase) inhibitor. It is a monomethoxyflavone, a tetrahydroxyflavone and a 7-hydroxyflavonol.

What is the CAS number of Isorhamnetin?

The CAS registry number of Isorhamnetin is 480-19-3.

What is the molecular formula and weight of Isorhamnetin?

The molecular formula of Isorhamnetin is C16H12O7 and its molar mass is 316.27 g/mol.

What is Isorhamnetin used for?

Known uses and roles of Isorhamnetin include skin conditioning agents in cosmetics and personal care, anticoagulant, enzyme inhibitor, hematologic agent, metabolite and 3 more.

Is Isorhamnetin hazardous?

Isorhamnetin carries the GHS signal word "Warning". Main hazards: suspected of causing cancer. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Isorhamnetin?

Isorhamnetin is usually classified under HS code 293299 (Heterocyclic compounds with oxygen hetero-atom(s) only, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Isorhamnetin?

CompoundList lists 52 suppliers of Isorhamnetin in China, United States, United Kingdom, Hong Kong and 7 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Isorhamnetin?

Suppliers quote Isorhamnetin on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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