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Chemical substance

Ethynol

Also known as Ethynyl alcohol, 1-Hydroxyethyne, oxyacetylene

CAS 32038-79-2Formula C2H2OMolar mass 42.04 g/mol
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Ethynol chemical structure, C2H2O, CAS 32038-79-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
32038-79-2
Formula
C2H2O
Molar mass
42.04 g/mol
HS code
294200

What is Ethynol?

Plain description, key identifiers and synonyms

Ethynol is a chemical substance with the molecular formula C2H2O and a molar mass of 42.04 g/mol. Its CAS registry number is 32038-79-2.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
ethynol
CAS number
32038-79-2 CAS number cross-checked
Molecular formula
C2H2O
InChIKey
QFXZANXYUCUTQH-UHFFFAOYSA-N
InChI
InChI=1S/C2H2O/c1-2-3/h1,3H
SMILES (canonical and isomeric)
C#CO

Synonyms

  • Ethynyl alcohol
  • 1-Hydroxyethyne
  • oxyacetylene

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
42.04 g/molcalc.
Exact mass
42.0106 Dacalc.
LogP (octanol/water)
-0.05calc.
Topological polar surface area
20.23 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
0calc.
Heavy atoms
3calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

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.

Ethynol suppliers

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Ethynol 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

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

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 Ethynol is traded under.

HS 2942.00Indicative HS code

Organic compounds not elsewhere classified in chapter 29

World exports in 2024
$589M
−43.5% vs 2023, imports $614M
2019 to 2024
Top exporters
  1. India * partner reported20.7%
  2. United States18.6%
  3. Italy10.4%
Top importers
  1. United States15.1%
  2. Italy6.7%
  3. Japan5.3%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Ethynol is indicative (it is known at chapter level only). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Ethynol?

Ethynol is a chemical substance with the molecular formula C2H2O and a molar mass of 42.04 g/mol. Its CAS registry number is 32038-79-2.

What is the CAS number of Ethynol?

The CAS registry number of Ethynol is 32038-79-2.

What is the molecular formula and weight of Ethynol?

The molecular formula of Ethynol is C2H2O and its molar mass is 42.04 g/mol.

Is Ethynol hazardous?

No GHS hazard classification for Ethynol 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 Ethynol?

Ethynol is usually classified under HS code 294200 (XIII. OTHER ORGANIC COMPOUNDS, other organic compounds). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Ethynol?

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What is the price of Ethynol?

Suppliers quote Ethynol 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 Ethynol

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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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