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1,4-Dioxane

C4H8O2, 88.106 g/mol. Its structure, the values that were measured, the values that were calculated, and where each one came from.

verified recordOrganic — ether7 measured properties371 documented reactions

Drawn from the SMILES. It shows how the atoms are connected — not a photograph of a molecule, and not its shape in space.

Identifiers

Molecular formula
C₄H₈O₂
Molecular weight
88.106 g/mol
Exact mass
88.052429 g/mol
IUPAC name
1,4-dioxane
SMILES
C1COCCO1
InChI
InChI=1S/C4H8O2/c1-2-6-4-3-5-1/h1-4H2
InChIKey
RYHBNJHYFVUHQT-UHFFFAOYSA-N

Both are open without an account.

Measured properties

Values somebody obtained from a sample and published. Where two sources report the same property they are both shown, in the units each used — a disagreement between them is information, and averaging it away would be inventing a number neither one gave.

Boiling Point
214 °F at 760 mmHg (NTP, 1992)measured · CAMEO Chemicals
101.2 °Cmeasured · Hazardous Substances Data Bank (HSDB)
Melting Point
53.2 °F (NTP, 1992)measured · CAMEO Chemicals
11.75 °Cmeasured · Hazardous Substances Data Bank (HSDB)
Density
1.036 at 68 °F (USCG, 1999) - Denser than water; will sinkmeasured · CAMEO Chemicals
1.0337 g/cu cm at 20 °Cmeasured · Hazardous Substances Data Bank (HSDB)
Solubility
greater than or equal to 100 mg/mL at 68 °F (NTP, 1992)measured · CAMEO Chemicals
In water, >800 g/L at 25 °Cmeasured · Hazardous Substances Data Bank (HSDB)
Vapor Pressure
29 mmHg at 68 °F ; 37 mmHg at 77 °F (NTP, 1992)measured · CAMEO Chemicals
38.1 [mmHg]measured · Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
LogP
log Kow = -0.27measured · Hazardous Substances Data Bank (HSDB)
-0.27measured · ILO-WHO International Chemical Safety Cards (ICSCs)
Flash Point
54 °F (NTP, 1992)measured · CAMEO Chemicals
18 °Cmeasured · Haz-Map, Information on Hazardous Chemicals and Occupational Diseases

Calculated properties

Derived from the structure rather than from a sample. These are reproducible and they are not measurements: a calculated partition coefficient and a measured one can differ by a long way, and where both exist they are listed apart on purpose.

Molecular weight
88.11 g/molcalculated · reference compound database
Average mass of one molecule, from reference compound database.
Exact mass
88.052429494 Dacalculated · reference compound database
Mass of the most common isotopic form.
XLogP3
-0.3calculated · reference compound database
Estimated oil/water partition, computed by reference compound database.
Polar surface area
18.5 Ųcalculated · reference compound database
Polar surface area as computed by reference compound database.
Complexity
26calculated · reference compound database
A rough measure of how intricate the structure is.
H-bond donors
0calculated · reference compound database
H-bond acceptors
2calculated · reference compound database
logP
0.0332calculated · chemistry engine
Estimated preference for oil over water. Higher means more oil-like.
Topological polar surface area
18.46 Ųcalculated · chemistry engine
Surface area from polar atoms; relates to how easily a molecule crosses membranes.
H-bond donors
0calculated · chemistry engine
Atoms that can donate a hydrogen bond.
H-bond acceptors
2calculated · chemistry engine
Atoms that can accept a hydrogen bond.
Rotatable bonds
0calculated · chemistry engine
Single bonds the molecule can freely twist around.
Molar refractivity
21.638 cm³/molcalculated · chemistry engine
Relates to the molecule's polarisability.
Fraction sp³ carbons
1calculated · chemistry engine
Share of carbon atoms with tetrahedral bonding.
QED drug-likeness
0.4157calculated · chemistry engine
Quantitative estimate of drug-likeness (0–1).

What it is made of

Elements

Percentages are of the molecular weight above, worked out the same way the molar mass calculator does it.

Structure

Heavy atoms, hydrogen excluded
6
Total atoms, hydrogen included
14
Rings
1
Aromatic rings
0
Stereocentres
0
Formal charge
0

Functional groups

  • Ether

    An oxygen bridging two carbons.

Matched by structural pattern, not by a measurement.

The molecule in three dimensions

Rotate and inspect the atoms. Loaded only when you ask, so the page stays light.

The drawing above is a diagram of what is bonded to what. A molecule is not flat, and the model here is one low-energy shape generated from the connectivity — useful for seeing which groups can reach each other, and not a measured structure. A real sample is a population of conformations, interconverting.

Other names for it

The systematic name on this record is 1,4-dioxane.

The sources also call it Dioxane, p-Dioxane, Diethylene ether, 1,4-Diethylene dioxide, 1,4-Dioxacyclohexane, Dioxan, Tetrahydro-1,4-dioxin, Tetrahydro-p-dioxin, Di(ethylene oxide), Diethylene dioxide, Dioxanne.

Structurally related

The structural neighbours could not be read just now. That is a failed lookup rather than a finding.

Where these values came from

compound record.

What this page does not claim

The identifiers are what the source record holds, copied rather than recomputed. Measured values are reported as their source gave them, units and all; calculated values are marked as calculated and are not measurements. Where a field is absent the page says so, because a blank cell reads as a zero and a guessed value reads as a fact.

Nothing here is a hazard assessment, a purity statement or advice about handling a sample. A flash point quoted from a safety database is a number somebody published, not a judgement by us about whether this molecule is safe for what you intend.