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Heterocyclic compounds

Oxetane

Also known as Trimethylene oxide, 1,3-Propylene oxide, Oxacyclobutane

CAS 503-30-0Formula C3H6OMolar mass 58.08 g/molEC 207-964-3
GHS signal word: Danger. Pictograms: Flammable, Harmful or irritant 15 suppliers listed
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Oxetane chemical structure, C3H6O, CAS 503-30-0
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Oil
Boiling point
48 °C
Density
0.8930 @ 25 °C/4 °C
Flash point
-28.3 °C
Solubility
SOL IN ALL PROPORTIONS OF WATER, ALCOHOL, SOL IN ETHER, VERY SOL IN ACETONE, ORGANIC SOL…
HS code
293299
Category
Heterocyclic compounds
UN number
UN 1280
Illustrative photo, 200 litre steel drums of liquid in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Oxetane?

Plain description, key identifiers and synonyms

Oxetane is a saturated organic heteromonocyclic parent that is a four-membered ring comprising of three carbon atoms and an oxygen atom. It is a saturated organic heteromonocyclic parent and a member of oxetanes.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
oxetane
CAS number
503-30-0 CAS number cross-checkedOther or deprecated CAS: 25722-06-9
EC number
207-964-3
Molecular formula
C3H6O
UNII
I279Q16FU6
MDL number
MFCD00005167
InChIKey
AHHWIHXENZJRFG-UHFFFAOYSA-N
InChI
InChI=1S/C3H6O/c1-2-4-3-1/h1-3H2
SMILES (canonical and isomeric)
C1COC1

Synonyms

  • Trimethylene oxide
  • 1,3-Propylene oxide
  • Oxacyclobutane
  • 1,3-Epoxypropane
  • Cyclooxabutane
  • Trimethylenoxid
  • Oxetan
  • 1,3-Trimethylene oxide
  • Propane, 1,3-epoxy-
  • alpha,gamma-Propane oxide
  • Trimethyleneoxide
  • Trimethylene oxide, 97%
  • Trimethylene oxide (8CI)
  • Propylene oxide, 1,3-
  • Trimethylene oxide, purum, >=97.0% (GC)

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

Appearance
Oilexp.
Odour
Agreeable aromatic odorexp.
Boiling point
48 °Cexp.
Density
0.8930 @ 25 °C/4 °Cexp.
Flash point
-28.3 °Cexp.
Solubility
SOL IN ALL PROPORTIONS OF WATER, ALCOHOL, SOL IN ETHER, VERY SOL IN ACETONE, ORGANIC SOLVENTSexp.
Vapour pressure
324 mm Hg @ 25 °Cexp.

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
58.08 g/molcalc.
Exact mass
58.0419 Dacalc.
LogP (octanol/water)
0.41calc.
Topological polar surface area
9.23 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
0calc.
Heavy atoms
4calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
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, C1COC1

C1COC1

1 ring, 4 atoms. This chemical is the scaffold itself.

2,079 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

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

Hazard statements

  • H225Highly flammable liquid and vapour.
  • H302Harmful if swallowed.
  • H312Harmful in contact with skin.
  • H332Harmful if inhaled.
Precautionary statements (22)
  • 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.
  • 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.
  • P317Get medical help.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 1280

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

Oxetane suppliers

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

All 15 suppliers
15 of 15 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

15 suppliers in 4 countries

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Oxetane 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

Chemical intermediate, eg, for epoxy resins & 3-substituted propanols.

Photoreactions leading to carefully selected oxetanes are impressive tools in the construction of complex molecules ... such as drugs, crop protection agents, and fragrants. (Oxetanes).

/Chemical intermediate/.

How it is made

Prepd by dropwise addition of 3-chloropropyl acetate to hot potassium hydroxide soln: Noller, Org Syn 29, 92 (1949), modified procedure: Searles, J Am Chem Soc, 73, 124 (1951).

Reaction of 3-bromopropanol with potassium hydroxide

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 603-058-00-0

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

Frequently asked questions

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

What is Oxetane?

Oxetane is a saturated organic heteromonocyclic parent that is a four-membered ring comprising of three carbon atoms and an oxygen atom. It is a saturated organic heteromonocyclic parent and a member of oxetanes.

What is the CAS number of Oxetane?

The CAS registry number of Oxetane is 503-30-0. Other or deprecated CAS numbers: 25722-06-9.

What is the molecular formula and weight of Oxetane?

The molecular formula of Oxetane is C3H6O and its molar mass is 58.08 g/mol.

What is Oxetane used for?

Chemical intermediate, eg, for epoxy resins & 3-substituted propanols. Photoreactions leading to carefully selected oxetanes are impressive tools in the construction of complex molecules ... such as drugs, crop protection agents, and fragrants. (Oxetanes). /Chemical intermediate/.

Is Oxetane hazardous?

Oxetane carries the GHS signal word "Danger". Main hazards: highly flammable liquid and vapour, harmful if swallowed, harmful in contact with skin. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Oxetane?

Oxetane 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 Oxetane?

CompoundList lists 15 suppliers of Oxetane in China, United States, Japan and Russia. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Oxetane?

Suppliers quote Oxetane 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 Oxetane

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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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