4-oxo-4-(phenylamino)-2-butenoic acid

Also known as: (E)-3-phenylcarbamoyl-acrylic acid, (E)-4-anilino-4-oxobut-2-enoic acid, 4-(phenylamino)-4-oxo-2-butenoic acid, 4-oxo-4-anilino-2-butenoic acid, N-phenyl-maleamic acid, N-phenylmaleanilic acid, maleic acid monoanilide, phenyl maleamic acid, TIMTEC-BB SBB003637

4-oxo-4-(phenylamino)-2-butenoic acid (CAS 37902-58-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C10H9NO3 and a molecular weight of 191.18300 g/mol. Key properties include a melting point of 206 °C, a boiling point of 442.1ºC at 760 mmHg, a density of 1.329g/cm3 and a flash point of 221.1ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 37902-58-2
Jingsj CID: J-16923-3
Molecular Formula: C₁₀H₉NO₃
Molecular Weight: 191.18300 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	206 °C
Boiling Point	442.1ºC at 760 mmHg
Density	1.329g/cm3
Flash Point	221.1ºC
Exact Mass	191.05800
PSA	66.40000
LogP	1.33890
Storage Conditions	2-8°C

Customs & Trade Information

HS Code	2924299090
Summary	2924299090. other cyclic amides (including cyclic carbamates) and their derivatives; salts thereof. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 4-oxo-4-(phenylamino)-2-butenoic acid?

The CAS number of 4-oxo-4-(phenylamino)-2-butenoic acid is 37902-58-2.

What are the molecular formula and molecular weight of 4-oxo-4-(phenylamino)-2-butenoic acid?

4-oxo-4-(phenylamino)-2-butenoic acid has molecular formula C10H9NO3 and molecular weight 191.18300 g/mol.

What are the upstream and downstream products of 4-oxo-4-(phenylamino)-2-butenoic acid?

For 4-oxo-4-(phenylamino)-2-butenoic acid, Downstream Products: 2-[(2,5-dioxo-1-phenylpyrrolidin-3-yl)sulfanyl]acetic acid, N-Phenylmaleimide, Fumaric acid.

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-oxo-4-(phenylamino)-2-butenoic acid (CAS 37902-58-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-16923-3 (accessed 2026-11-09).

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