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Heterocyclic building blocks

Chromone

Also known as 4H-Chromen-4-one, 4-Chromone, Chromen-4-one

CAS 491-38-3Formula C9H6O2Molar mass 146.15 g/molEC 207-737-9
GHS signal word: Warning. Pictograms: Harmful or irritant 19 suppliers listed
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Chromone chemical structure, C9H6O2, CAS 491-38-3
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
491-38-3
Formula
C9H6O2
Molar mass
146.15 g/mol
EC number
207-737-9
HS code
293299
Category
Heterocyclic building blocks

What is Chromone?

Plain description, key identifiers and synonyms

Chromone is the simplest member of the class of chromones that is 4H-chromene with an oxo group at position 4. It is a member of chromones and an enone.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
chromen-4-one
CAS number
491-38-3 CAS number cross-checked
EC number
207-737-9
Molecular formula
C9H6O2
UNII
20C556MJ76
MDL number
MFCD00024064
InChIKey
OTAFHZMPRISVEM-UHFFFAOYSA-N
InChI
InChI=1S/C9H6O2/c10-8-5-6-11-9-4-2-1-3-7(8)9/h1-6H
SMILES (canonical and isomeric)
C1=CC=C2C(=C1)C(=O)C=CO2

Synonyms

  • 4H-Chromen-4-one
  • 4-Chromone
  • Chromen-4-one
  • Benzo-gamma-pyrone
  • 1,4-benzopyrone
  • 4H-1-Benzopyran-4-one
  • 1-Benzopyran-4-one
  • 4H-Benzo(b)pyran-4-one
  • 4-oxo-4H-1-benzopyran
  • Benzopyrone
  • 4-chromenone
  • benzopyran-4-one
  • Chromone-
  • Benz-g-pyrone
  • benzo-|A-pyrone
  • chromone, 12
  • Chromone, 99%
  • 4H-Chromen-4-one #
  • 5-17-10-00139 (Beilstein Handbook Reference)
  • 4H-chromen-4-one [M+H]+

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
146.15 g/molcalc.
Exact mass
146.0368 Dacalc.
LogP (octanol/water)
1.79calc.
Topological polar surface area
30.21 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
11calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0calc.
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=c1ccoc2ccccc12

O=c1ccoc2ccccc12

2 rings, 11 atoms. This chemical is the scaffold itself.

1,163 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (16)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • 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

Chromone suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 19 suppliers
19 of 19 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

19 suppliers in 4 countries

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Chromone price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Chromone 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 Chromone is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Chromone?

Chromone is the simplest member of the class of chromones that is 4H-chromene with an oxo group at position 4. It is a member of chromones and an enone.

What is the CAS number of Chromone?

The CAS registry number of Chromone is 491-38-3.

What is the molecular formula and weight of Chromone?

The molecular formula of Chromone is C9H6O2 and its molar mass is 146.15 g/mol.

What is Chromone used for?

Known uses and roles of Chromone include building blocks in research and laboratory and screening compounds in research and laboratory.

Is Chromone hazardous?

Chromone carries the GHS signal word "Warning". Main hazards: causes skin irritation, causes serious eye irritation, may cause respiratory irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Chromone?

Chromone 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 Chromone?

CompoundList lists 19 suppliers of Chromone in China, United States, Germany and Netherlands. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Chromone?

Suppliers quote Chromone 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

Practical guides that help when you source, ship or handle Chromone

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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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