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Heterocyclic building blocks

Chroman

Also known as Chromane, 3,4-Dihydro-2H-1-benzopyran, Dihydrobenzopyran

CAS 493-08-3Formula C9H10OMolar mass 134.18 g/molEC 874-955-4
GHS signal word: Warning. Pictograms: Flammable, Harmful or irritant 8 suppliers listed
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Chroman chemical structure, C9H10O, CAS 493-08-3
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
493-08-3
Formula
C9H10O
Molar mass
134.18 g/mol
Physical form
Liquid
HS code
293299
Category
Heterocyclic building blocks
Illustrative photo, a closed 1000 litre IBC tote in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Chroman?

Plain description, key identifiers and synonyms

Chromane is a benzopyran consisting of a pyran ring having a benzene ring ortho-fused across positions 2 and 3.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
3,4-dihydro-2H-chromene
CAS number
493-08-3 CAS number cross-checked
EC number
874-955-4
Molecular formula
C9H10O
UNII
EJ8R7LY9PK
MDL number
MFCD00138123
InChIKey
VZWXIQHBIQLMPN-UHFFFAOYSA-N
InChI
InChI=1S/C9H10O/c1-2-6-9-8(4-1)5-3-7-10-9/h1-2,4,6H,3,5,7H2
SMILES (canonical and isomeric)
C1CC2=CC=CC=C2OC1

Synonyms

  • Chromane
  • 3,4-Dihydro-2H-1-benzopyran
  • Dihydrobenzopyran
  • 2H-1-Benzopyran, 3,4-dihydro-
  • 3,4-dihydrobenzo[b]pyran
  • Benzopyran, 3,4-dihydro
  • 3,4-dihydrobenzo(b)pyran
  • 3,4-dihydro-2H-chromene
  • 3,4-Dihydro-(1H)-benzopyrane
  • Dihydrobenzo[b]pyran
  • racemic chroman
  • 3,4-dihydrobenzopyran
  • 3,4-dihydro-1-benzopyran
  • 3,4-dihydro-2H-benzopyran
  • 3,4-Dihydro-1H-benzopyran
  • Chromane, 3,4-Dihydro-1H-benzopyran

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

Physical form
Liquidexp.

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
134.18 g/molcalc.
Exact mass
134.0732 Dacalc.
LogP (octanol/water)
2.01calc.
Topological polar surface area
9.23 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
0calc.
Heavy atoms
10calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.33calc.
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, c1ccc2c(c1)CCCO2

c1ccc2c(c1)CCCO2

2 rings, 10 atoms. This chemical is the scaffold itself.

4,102 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS02: Flammable
Flammable
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H226Flammable liquid and vapour.
  • H302Harmful if swallowed.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (28)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P233Keep container tightly closed.
  • P240Ground and bond container and receiving equipment.
  • P241Use explosion-proof electrical, ventilating and lighting equipment.
  • P242Use non-sparking tools.
  • P243Take action to prevent static discharges.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • 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.
  • P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
  • 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).
  • P330Rinse mouth.
  • 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.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • 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

Chroman suppliers

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

All 8 suppliers
8 of 8 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

8 suppliers in 4 countries

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Chroman 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

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 Chroman 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 Chroman is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Chroman?

Chromane is a benzopyran consisting of a pyran ring having a benzene ring ortho-fused across positions 2 and 3.

What is the CAS number of Chroman?

The CAS registry number of Chroman is 493-08-3.

What is the molecular formula and weight of Chroman?

The molecular formula of Chroman is C9H10O and its molar mass is 134.18 g/mol.

What is Chroman used for?

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

Is Chroman hazardous?

Chroman carries the GHS signal word "Warning". Main hazards: flammable liquid and vapour, harmful if swallowed, causes skin irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Chroman?

Chroman 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 Chroman?

CompoundList lists 8 suppliers of Chroman in China, United States, Hong Kong and Singapore. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Chroman?

Suppliers quote Chroman 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 Chroman

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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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