5-Methyl-2-benzofuran-1,3-dione

4-甲基苯酐

Also known as: 4-Methylphthalic anhydride, 4-Methylphthalic acid anhydride, 5-Methyl-1,3-isobenzofurandione, 5-Methylisobenzofuran-1,3-dione, 4-methylphthalic anhydride, 5-methyl-3-isobenzofurandione, 5-methylphthalic acid anhydride

5-Methyl-2-benzofuran-1,3-dione (CAS 19438-61-0) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C9H6O3 and a molecular weight of 162.142 g/mol. It is also known as 4-Methylphthalic anhydride, 4-Methylphthalic acid anhydride and 5-Methyl-1,3-isobenzofurandione. Key properties include a melting point of 90-92 °C(lit.), a boiling point of 295.0±0.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 156.3±19.2 °C. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

19438-61-0

Jingsj CID

J-27122-4

Molecular Formula

C₉H₆O₃

Chinese Name

4-甲基苯酐

Molecular Weight

162.142 g/mol

Category

Aromatic Hydrocarbons

Last updated

8/21/2026