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Heterocyclic building blocks

Pyran

Also known as 2H-pyran, alpha-Pyran, 1,2-Pyran

CAS 289-66-7Formula C5H6OMolar mass 82.10 g/mol
2 suppliers listed
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Pyran chemical structure, C5H6O, CAS 289-66-7
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
289-66-7
Formula
C5H6O
Molar mass
82.10 g/mol
HS code
293299
Category
Heterocyclic building blocks

What is Pyran?

Plain description, key identifiers and synonyms

2H-pyran is a pyran. It is a tautomer of a 4H-pyran.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2H-pyran
CAS number
289-66-7Other or deprecated CAS: 31441-32-4
Molecular formula
C5H6O
UNII
CH5P2A5WTT
InChIKey
MGADZUXDNSDTHW-UHFFFAOYSA-N
InChI
InChI=1S/C5H6O/c1-2-4-6-5-3-1/h1-4H,5H2
SMILES (canonical and isomeric)
C1C=CC=CO1

Synonyms

  • 2H-pyran
  • alpha-Pyran
  • 1,2-Pyran
  • trans-pyran
  • pyran-
  • 1,2-dihyropyran
  • 1,2-dihydropyrane

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
82.10 g/molcalc.
Exact mass
82.0419 Dacalc.
LogP (octanol/water)
1.09calc.
Topological polar surface area
9.23 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
0calc.
Heavy atoms
6calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.2calc.
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, C1=CCOC=C1

C1=CCOC=C1

1 ring, 6 atoms. This chemical is the scaffold itself.

35 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

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

Pyran suppliers

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

All 2 suppliers
  • Ambinter
    France, OrleansUnclaimed profile
    PyranGrade, purity and minimum order on request
    Price on request
    View
  • EvitaChem
    China, BeijingUnclaimed profile
    PyranGrade, purity and minimum order on request
    Price on request
    View

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

2 suppliers in 2 countries

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

Frequently asked questions

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

What is Pyran?

2H-pyran is a pyran. It is a tautomer of a 4H-pyran.

What is the CAS number of Pyran?

The CAS registry number of Pyran is 289-66-7. Other or deprecated CAS numbers: 31441-32-4.

What is the molecular formula and weight of Pyran?

The molecular formula of Pyran is C5H6O and its molar mass is 82.10 g/mol.

What is Pyran used for?

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

Is Pyran hazardous?

No GHS hazard classification for Pyran is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Pyran?

Pyran 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 Pyran?

CompoundList lists 2 suppliers of Pyran in China and France. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Pyran?

Suppliers quote Pyran 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 Pyran

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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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