4-Methyl-2-pentyne

Also known as: 1-isopropyl-2-methylacetylene, 2-Pentyne, 4-methyl-, 2-Pentyne,4-methyl, 2-methyl-4-pentyne, 2-pentyne,4-methyl-, 4-METHYL-2-PENTYNE, 4-METHYL-2-PENTYNE, 97%4-METHYL-2-PENTYNE, 97%4-METHYL-2-PENTYNE, 97%4-METHYL-2-PENTYNE, 97%, 4-Methylpent-2-yne, 4-methyl-pent-2-yne, 4-methylpent-2-yne, ISOPROPYLMETHYLACETYLENE, Isopropylmethylacetylene, MFCD00041615, methyl(isopropyl)acetylene, methylisopropylacetylene, methylpentyne

4-Methyl-2-pentyne (CAS 21020-27-9) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C6H10 and a molecular weight of 82.144 g/mol. Key properties include a melting point of 110ºC, a boiling point of 70.3±8.0 °C at 760 mmHg, a density of 0.7±0.1 g/cm3 and a flash point of -18.5±12.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 21020-27-9
Jingsj CID: J-1393186-7
Molecular Formula: C₆H₁₀
Molecular Weight: 82.144 g/mol
Category: Aliphatic Hydrocarbons
Last updated: 8/21/2026

Request MSDS / TDS

No offers for this compound yet.

Request a quote

Physicochemical Properties

Melting Point	110ºC
Boiling Point	70.3±8.0 °C at 760 mmHg
Density	0.7±0.1 g/cm3
Flash Point	-18.5±12.6 °C
Exact Mass	82.078247
LogP	2.34
Appearance	Liquid \| Clear slightly yellow
Vapor Pressure	140.9±0.1 mmHg at 25°C
Refractive Index	1.414
Storage Conditions	Flammables area

Customs & Trade Information

HS Code	2901299090
Summary	2901299090 unsaturated acyclic hydrocarbons。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:2.0%。General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 4-Methyl-2-pentyne?

The CAS number of 4-Methyl-2-pentyne is 21020-27-9.

What are the molecular formula and molecular weight of 4-Methyl-2-pentyne?

4-Methyl-2-pentyne has molecular formula C6H10 and molecular weight 82.144 g/mol.

What are the upstream and downstream products of 4-Methyl-2-pentyne?

For 4-Methyl-2-pentyne, Upstream Products: 2-Methyl-3-pentyn-2-ol, Isobutylene, 2-Pentene, 4-methyl-,(2Z)-; Downstream Products: 2-Methyl-3-pentanone, 4-Methyl-2-pentanone, 2-Pentene, 4-methyl-,(2Z)-.

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

Last updated: 8/21/2026

How to cite: Jingsj. "4-Methyl-2-pentyne (CAS 21020-27-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1393186-7 (accessed 2026-11-09).

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