isocrotonic acid

Also known as: (2Z)-2-butenoic acid, cis-crotonic acid, (Z)-2-butenoic acid, cis-2-butenoic acid, allocrotonic acid

isocrotonic acid (CAS 503-64-0) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C4H6O2 and a molecular weight of 86.08920 g/mol. Key properties include a melting point of 12.5-14ºC, a boiling point of 177ºC at 760mmHg, a density of 1.039g/cm3 and a flash point of 81.6ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 503-64-0
Jingsj CID: J-1347157-3
Molecular Formula: C₄H₆O₂
Molecular Weight: 86.08920 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	12.5-14ºC
Boiling Point	177ºC at 760mmHg
Density	1.039g/cm3
Flash Point	81.6ºC
Exact Mass	86.03680
PSA	37.30000
LogP	0.64710
Refractive Index	1.448

Customs & Trade Information

HS Code	2916190090
Summary	2916190090 unsaturated acyclic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives。supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward)。VAT:17.0%。tax rebate rate:9.0%。MFN tariff:6.5%。general tariff:30.0%

Frequently Asked Questions

What is the CAS number of isocrotonic acid?

The CAS number of isocrotonic acid is 503-64-0.

What are the molecular formula and molecular weight of isocrotonic acid?

isocrotonic acid has molecular formula C4H6O2 and molecular weight 86.08920 g/mol.

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. "isocrotonic acid (CAS 503-64-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1347157-3 (accessed 2026-11-09).

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