4-Hydroxy-4-methylpent-2-ynoic acid

4-羟基-4-甲基戊-2-炔酸

Also known as: 4-HYDROXY-4-METHYL-PENT-2-YNOIC ACID, 4-hydroxy-4-methyl-2-pentynoic acid, 2-Pentynoic acid, 4-hydroxy-4-methyl-, ASINEX-REAG BAS 13090107

4-Hydroxy-4-methylpent-2-ynoic acid (CAS 50624-25-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H8O3 and a molecular weight of 128.12600 g/mol. It is also known as 4-HYDROXY-4-METHYL-PENT-2-YNOIC ACID, 4-hydroxy-4-methyl-2-pentynoic acid and 2-Pentynoic acid, 4-hydroxy-4-methyl-. Key properties include a boiling point of 275.8ºC at 760 mmHg, a density of 1.243g/cm3 and a flash point of 134.8ºC. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 50624-25-4
Jingsj CID: J-1966428-6
Molecular Formula: C₆H₈O₃
Chinese Name: 4-羟基-4-甲基戊-2-炔酸
Molecular Weight: 128.12600 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	275.8ºC at 760 mmHg
Density	1.243g/cm3
Flash Point	134.8ºC

GHS Safety & Compliance

IrritantSignal word: Warning

Frequently Asked Questions

What is the CAS number of 4-Hydroxy-4-methylpent-2-ynoic acid?

The CAS number of 4-Hydroxy-4-methylpent-2-ynoic acid is 50624-25-4.

What are the molecular formula and molecular weight of 4-Hydroxy-4-methylpent-2-ynoic acid?

4-Hydroxy-4-methylpent-2-ynoic acid has molecular formula C6H8O3 and molecular weight 128.12600 g/mol.

Is 4-Hydroxy-4-methylpent-2-ynoic acid hazardous?

4-Hydroxy-4-methylpent-2-ynoic acid has GHS signal word Warning.

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

Last updated: 8/21/2026

How to cite: Jingsj. "4-Hydroxy-4-methylpent-2-ynoic acid (CAS 50624-25-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1966428-6 (accessed 2026-10-25).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.