4-Aminophthalide

Also known as: 4-Aminoisobenzofuran-1(3H)-one, 4-Amino-2-benzofuran-1(3H)-one, 4-Amino-3H-isobenzofuran-1-one, 1(3H)-Isobenzofuranone, 4-amino-, Lenalidomide Impurity 99

4-Aminophthalide (CAS 59434-19-4) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C8H7NO2 and a molecular weight of 149.14700 g/mol. Key properties include a melting point of 154-155ºC, a boiling point of 411.012ºC at 760 mmHg, a density of 1.376 and a flash point of 241.528ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 59434-19-4
Jingsj CID: J-1510825-5
Molecular Formula: C₈H₇NO₂
Molecular Weight: 149.14700 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	154-155ºC
Boiling Point	411.012ºC at 760 mmHg
Density	1.376
Flash Point	241.528ºC
Exact Mass	149.04800
PSA	52.32000
LogP	1.52040
Refractive Index	1.656

Customs & Trade Information

HS Code	2932209090
Summary	2932209090. other lactones. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 4-Aminophthalide?

The CAS number of 4-Aminophthalide is 59434-19-4.

What are the molecular formula and molecular weight of 4-Aminophthalide?

4-Aminophthalide has molecular formula C8H7NO2 and molecular weight 149.14700 g/mol.

What are the upstream and downstream products of 4-Aminophthalide?

For 4-Aminophthalide, Upstream Products: 4-Nitrophthalide, 3-Nitrophthalic anhydride, 3-Acetamidophthalic anhydride; Downstream Products: 4-Chlorophthalide, 4-Bromo-2-benzofuran-1(3H)-one, 4-Hydroxyisobenzofuran-1(3H)-one.

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-Aminophthalide (CAS 59434-19-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1510825-5 (accessed 2026-11-09).

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