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5-Ethynyl-1-methyl-1H-imidazole

Also known as: 1H-Imidazole, 5-ethynyl-1-methyl-, 1H-Imidazole,5-ethynyl-1-methyl, 5-ETHYNYL-1-METHYL-1H-IMIDAZOLE 97, 5-Ethynyl-1-methyl-1H-imidazole, 5-ethynyl-1-methyl-(1H)imidazole, 5-ethynyl-1-methylimidazole, Ethynyl-imidazol, HCC-5-C3H2N2Me-1, MFCD04974089

5-Ethynyl-1-methyl-1H-imidazole (CAS 71759-92-7) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H6N2 and a molecular weight of 106.12500 g/mol. Key properties include a boiling point of 116ºC25 mm Hg(lit.), a density of 1.045 g/mL at 25ºC(lit.) and a flash point of 104.4 °C. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed, H315 — Causes skin irritation and H318 — Causes serious eye damage. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.

CAS No.
71759-92-7
Jingsj CID
J-18003-0
Molecular Formula
C6H6N2
Molecular Weight
106.12500 g/mol
Category
Pharma Intermediates
Last updated
11/2/2026
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Physicochemical Properties

Boiling Point116ºC25 mm Hg(lit.)
Density1.045 g/mL at 25ºC(lit.)
Flash Point104.4 °C
Exact Mass106.05300
PSA17.82000
LogP0.40140
Refractive Indexn20/D 1.5490(lit.)

GHS Safety & Compliance

Corrosion / IrritantSignal word: Danger
  • H302 — Harmful if swallowed
  • H315 — Causes skin irritation
  • H318 — Causes serious eye damage
  • H335 — May cause respiratory irritation

Frequently Asked Questions

What is the CAS number of 5-Ethynyl-1-methyl-1H-imidazole?

The CAS number of 5-Ethynyl-1-methyl-1H-imidazole is 71759-92-7.

What are the molecular formula and molecular weight of 5-Ethynyl-1-methyl-1H-imidazole?

5-Ethynyl-1-methyl-1H-imidazole has molecular formula C6H6N2 and molecular weight 106.12500 g/mol.

Is 5-Ethynyl-1-methyl-1H-imidazole hazardous?

5-Ethynyl-1-methyl-1H-imidazole has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H315 — Causes skin irritation; H318 — Causes serious eye damage.

What are the upstream and downstream products of 5-Ethynyl-1-methyl-1H-imidazole?

For 5-Ethynyl-1-methyl-1H-imidazole, Upstream Products: 1-Methyl-1H-imidazole-5-carbaldehyde, Dimethyl (1-diazo-2-oxopropyl)phosphonate, Trimethylsilylacetylene.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "5-Ethynyl-1-methyl-1H-imidazole (CAS 71759-92-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-18003-0 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.