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Chemical substance

Acetylide ion

Also known as dicarbide(1-), ethynide

CAS 29075-95-4Formula C2H-Molar mass 25.03 g/mol
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Acetylide ion chemical structure, C2H-, CAS 29075-95-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
29075-95-4
Formula
C2H-
Molar mass
25.03 g/mol
HS code
290129

What is Acetylide ion?

Plain description, key identifiers and synonyms

Dicarbide(1-) is the monoanion formed by loss of one proton from acetylene (ethyne).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
ethyne
CAS number
29075-95-4 CAS number cross-checked
Molecular formula
C2H-
InChIKey
BLRXYTIIKIPJQL-UHFFFAOYSA-N
InChI
InChI=1S/C2H/c1-2/h1H/q-1
SMILES (canonical and isomeric)
C#[C-]

Synonyms

  • dicarbide(1-)
  • ethynide

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
25.03 g/molcalc.
Exact mass
25.0084 Dacalc.
LogP (octanol/water)
0.21calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
2calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
-1calc.
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.

Acetylide ion suppliers

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Acetylide ion price

Indicative price range per kg from live supplier offers

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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 Acetylide ion is traded under.

HS 2901.29Indicative HS code

Unsaturated, other

World exports in 2024
$2.65B
−3.2% vs 2023, imports $2.57B
2019 to 2024
Top exporters
  1. United States43.9%
  2. South Africa15.3%
  3. Qatar * partner reported9.0%
Top importers
  1. Singapore10.9%
  2. United States10.1%
  3. South Korea8.7%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Acetylide ion, based on the data on this page

What is Acetylide ion?

Dicarbide(1-) is the monoanion formed by loss of one proton from acetylene (ethyne).

What is the CAS number of Acetylide ion?

The CAS registry number of Acetylide ion is 29075-95-4.

What is the molecular formula and weight of Acetylide ion?

The molecular formula of Acetylide ion is C2H- and its molar mass is 25.03 g/mol.

Is Acetylide ion hazardous?

No GHS hazard classification for Acetylide ion 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 Acetylide ion?

Acetylide ion is usually classified under HS code 290129 (Unsaturated, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Acetylide ion?

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What is the price of Acetylide ion?

Suppliers quote Acetylide ion 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 Acetylide ion

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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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