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Heterocyclic building blocks

Chromanone

Also known as 4-Chromanone, 4H-1-Benzopyran-4-one, 2,3-dihydro-, 2,3-dihydrochromen-4-one

CAS 491-37-2Formula C9H8O2Molar mass 148.16 g/molEC 207-736-3
GHS signal word: Warning. Pictograms: Harmful or irritant 18 suppliers listed
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Chromanone chemical structure, C9H8O2, CAS 491-37-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
491-37-2
Formula
C9H8O2
Molar mass
148.16 g/mol
EC number
207-736-3
HS code
293299
Category
Heterocyclic building blocks

What is Chromanone?

Plain description, key identifiers and synonyms

4-Chromanone is a member of chromones.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2,3-dihydrochromen-4-one
CAS number
491-37-2 CAS number cross-checkedOther or deprecated CAS: 1341-36-2
EC number
207-736-3
Molecular formula
C9H8O2
MDL number
MFCD00006840
InChIKey
MSTDXOZUKAQDRL-UHFFFAOYSA-N
InChI
InChI=1S/C9H8O2/c10-8-5-6-11-9-4-2-1-3-7(8)9/h1-4H,5-6H2
SMILES (canonical and isomeric)
C1COC2=CC=CC=C2C1=O

Synonyms

  • 4-Chromanone
  • 4H-1-Benzopyran-4-one, 2,3-dihydro-
  • 2,3-dihydrochromen-4-one
  • Chroman-4-one
  • 2,3-Dihydro-1-benzopyran-4-one
  • 2,3-Dihydro-4H-chromen-4-one
  • 3,4-dihydro-2H-1-benzopyran-4-one
  • Isochromanone
  • 2,3-Dihydro-4H-1-benzopyran-4-one
  • 4-chromanon
  • dihydrochromone
  • 4-Chromanone, 97%
  • 2H-[1]benzopyran-4-one
  • 2H-Chromen-4(3H)-one
  • 2,3-Dihydro-4-benzopyranone
  • 2,3-Dihydro-2-benzopyran-4-one
  • 3,4-dihydro-2H-benzopyran-4-one
  • 2,3-Dihydro-4H-chromen-4-one #

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
148.16 g/molcalc.
Exact mass
148.0524 Dacalc.
LogP (octanol/water)
1.65calc.
Topological polar surface area
26.3 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
11calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.22calc.
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=C1CCOc2ccccc21

O=C1CCOc2ccccc21

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

745 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

  • H303May be harmful if swallowed.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (17)
  • 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.
  • P301 + P317If swallowed: Get medical help.
  • 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

Chromanone suppliers

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

All 18 suppliers
18 of 18 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

18 suppliers in 7 countries

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Chromanone price

Indicative price range per kg from live supplier offers

No published prices right now

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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

United States

  • TSCA inventory (USA)
    Status: Active in US commerce, Regulatory flags: Added by a premanufacture notice

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

Frequently asked questions

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

What is Chromanone?

4-Chromanone is a member of chromones.

What is the CAS number of Chromanone?

The CAS registry number of Chromanone is 491-37-2. Other or deprecated CAS numbers: 1341-36-2.

What is the molecular formula and weight of Chromanone?

The molecular formula of Chromanone is C9H8O2 and its molar mass is 148.16 g/mol.

What is Chromanone used for?

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

Is Chromanone hazardous?

Chromanone carries the GHS signal word "Warning". Main hazards: may be harmful if swallowed, causes skin irritation, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Chromanone?

Chromanone 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 Chromanone?

CompoundList lists 18 suppliers of Chromanone in China, United States, Canada, Hong Kong and 3 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 Chromanone?

Suppliers quote Chromanone 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 Chromanone

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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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