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Heterocyclic building blocks

Dioxene

Also known as 1,4-Dioxene, 2,3-Dihydro-1,4-dioxine, 1,4-Dioxin, 2,3-dihydro-

CAS 543-75-9Formula C4H6O2Molar mass 86.09 g/molEC 679-798-3
GHS signal word: Danger. Pictograms: Flammable, Corrosive, Harmful or irritant
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Dioxene chemical structure, C4H6O2, CAS 543-75-9
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
543-75-9
Formula
C4H6O2
Molar mass
86.09 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 Dioxene?

Plain description, key identifiers and synonyms

Dioxene is a chemical substance with the molecular formula C4H6O2 and a molar mass of 86.09 g/mol. Its CAS registry number is 543-75-9. The IUPAC name is 2,3-dihydro-1,4-dioxine.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2,3-dihydro-1,4-dioxine
CAS number
543-75-9 CAS number cross-checked
EC number
679-798-3
Molecular formula
C4H6O2
UNII
964XEE4JQL
MDL number
MFCD00082537
InChIKey
HIZVCIIORGCREW-UHFFFAOYSA-N
InChI
InChI=1S/C4H6O2/c1-2-6-4-3-5-1/h1-2H,3-4H2
SMILES (canonical and isomeric)
C1COC=CO1

Synonyms

  • 1,4-Dioxene
  • 2,3-Dihydro-1,4-dioxine
  • 1,4-Dioxin, 2,3-dihydro-
  • p-Dioxene
  • 2,3-Dihydro-1,4-dioxin
  • p-Dioxin, 2,3-dihydro-
  • 2,3-Dihydro-1,4-dioxine #

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
86.09 g/molcalc.
Exact mass
86.0368 Dacalc.
LogP (octanol/water)
0.5calc.
Topological polar surface area
18.46 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
6calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.5calc.
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=COCCO1

C1=COCCO1

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

40 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS02: Flammable
Flammable
GHS05: Corrosive
Corrosive
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H225Highly flammable liquid and vapour.
  • H314Causes severe skin burns and eye damage.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (31)
  • 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.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • 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 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P352If on skin: Wash with plenty of water.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • 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.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • 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.
  • P363Wash contaminated clothing 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

Dioxene suppliers

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

Frequently asked questions

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

What is Dioxene?

Dioxene is a chemical substance with the molecular formula C4H6O2 and a molar mass of 86.09 g/mol. Its CAS registry number is 543-75-9. The IUPAC name is 2,3-dihydro-1,4-dioxine.

What is the CAS number of Dioxene?

The CAS registry number of Dioxene is 543-75-9.

What is the molecular formula and weight of Dioxene?

The molecular formula of Dioxene is C4H6O2 and its molar mass is 86.09 g/mol.

What is Dioxene used for?

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

Is Dioxene hazardous?

Dioxene carries the GHS signal word "Danger". Main hazards: highly flammable liquid and vapour, causes severe skin burns and eye damage, causes skin irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Dioxene?

Dioxene 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 Dioxene?

Post a free request on CompoundList and suppliers of Dioxene will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Dioxene?

Suppliers quote Dioxene 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 Dioxene

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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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