1,4-Dioxane
Also known as: p-Dioxane, Diethylene oxide, 1,4-Diethylene dioxide, 1,4-Dioxacyclohexane, Dioxane, Tetrahydro-1,4-dioxin, para-Dioxane, Dioxyethylene ether
1,4-Dioxane (CAS 123-91-1) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C4H8O2 and a molecular weight of 88.10510 g/mol. Key properties include a melting point of 12 °C, a boiling point of 101 °C, a density of 1.033 and a flash point of 12 ºC. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 123-91-1
- Jingsj CID
- J-2755-4
- Molecular Formula
- C4H8O2
- Molecular Weight
- 88.10510 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 12 °C |
|---|---|
| Boiling Point | 101 °C |
| Density | 1.033 |
| Flash Point | 12 ºC |
| Exact Mass | 88.05240 |
| PSA | 18.46000 |
| LogP | 0.03320 |
| Additional Property | 3 (vs air) |
| Vapor Pressure | 11.2mmHg at 25°C |
| Refractive Index | n20/D 1.422(lit.) |
| Additional Property | SOLUBLE |
GHS Safety & Compliance
- H225 — Highly flammable liquid and vapour
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
- H351 — Suspected of causing cancer
Customs & Trade Information
| HS Code | 2932999070 |
|---|---|
| Summary | 2932999070 1,4-dioxane |
Frequently Asked Questions
What is the CAS number of 1,4-Dioxane?
The CAS number of 1,4-Dioxane is 123-91-1.
What are the molecular formula and molecular weight of 1,4-Dioxane?
1,4-Dioxane has molecular formula C4H8O2 and molecular weight 88.10510 g/mol.
Is 1,4-Dioxane hazardous?
1,4-Dioxane has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of 1,4-Dioxane?
For 1,4-Dioxane, Upstream Products: Diethyl malonate, Diethylene glycol, Ethylene oxide; Downstream Products: 1,2,3,4-Tetrahydronaphthalene, 5-Methoxy-1,2,3,4-tetrahydronaphthalene, (5-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)methanol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1,4-Dioxane (CAS 123-91-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-2755-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.