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Ethers, epoxides and acetals

Ethyne, methoxy-

Also known as Methoxyacetylene, methoxyethyne, HC.equiv.COCH3

CAS 6443-91-0Formula C3H4OMolar mass 56.06 g/mol
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Ethyne, methoxy- chemical structure, C3H4O, CAS 6443-91-0
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
6443-91-0
Formula
C3H4O
Molar mass
56.06 g/mol
HS code
290919
Category
Ethers, epoxides and acetals

What is Ethyne, methoxy-?

Plain description, key identifiers and synonyms

Ethyne, methoxy- is a chemical substance with the molecular formula C3H4O and a molar mass of 56.06 g/mol. Its CAS registry number is 6443-91-0. The IUPAC name is methoxyethyne.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
methoxyethyne
CAS number
6443-91-0 CAS number cross-checked
Molecular formula
C3H4O
InChIKey
QRNDDJXJUHBGSG-UHFFFAOYSA-N
InChI
InChI=1S/C3H4O/c1-3-4-2/h1H,2H3
SMILES (canonical and isomeric)
COC#C

Synonyms

  • Methoxyacetylene
  • methoxyethyne
  • HC.equiv.COCH3
  • HC=COCH3

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
56.06 g/molcalc.
Exact mass
56.0262 Dacalc.
LogP (octanol/water)
0.22calc.
Topological polar surface area
9.23 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
0calc.
Heavy atoms
4calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.33calc.
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.

Ethyne, methoxy- suppliers

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

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Ethyne, methoxy- 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 Ethyne, methoxy- is traded under.

HS 2909.19Indicative HS code

Acyclic ethers and their halogenated, sulphonated, nitrated or nitrosated derivatives…

World exports in 2024
$10.2B
−8.7% vs 2023, imports $10.4B
2019 to 2024
Top exporters
  1. United States32.0%
  2. China22.3%
  3. Saudi Arabia12.9%
Top importers
  1. Singapore16.5%
  2. Mexico14.8%
  3. Japan14.8%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Ethyne, methoxy- is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Ethyne, methoxy-, based on the data on this page

What is Ethyne, methoxy-?

Ethyne, methoxy- is a chemical substance with the molecular formula C3H4O and a molar mass of 56.06 g/mol. Its CAS registry number is 6443-91-0. The IUPAC name is methoxyethyne.

What is the CAS number of Ethyne, methoxy-?

The CAS registry number of Ethyne, methoxy- is 6443-91-0.

What is the molecular formula and weight of Ethyne, methoxy-?

The molecular formula of Ethyne, methoxy- is C3H4O and its molar mass is 56.06 g/mol.

Is Ethyne, methoxy- hazardous?

No GHS hazard classification for Ethyne, methoxy- 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 Ethyne, methoxy-?

Ethyne, methoxy- is usually classified under HS code 290919 (Acyclic ethers and their halogenated, sulphonated, nitrated or nitrosated derivatives…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Ethyne, methoxy-?

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

What is the price of Ethyne, methoxy-?

Suppliers quote Ethyne, methoxy- 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 Ethyne, methoxy-

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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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