5-Methyl-2-benzofuran-1,3-dione
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. 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. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 19438-61-0
- Jingsj CID
- J-27122-7
- Molecular Formula
- C9H6O3
- Molecular Weight
- 162.142 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 90-92 °C(lit.) |
|---|---|
| Boiling Point | 295.0±0.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 156.3±19.2 °C |
| Exact Mass | 162.031693 |
| PSA | 43.37000 |
| LogP | 2.06 |
| Vapor Pressure | 0.0±0.6 mmHg at 25°C |
| Refractive Index | 1.597 |
| Additional Property | insoluble |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2932999099 |
|---|---|
| Summary | 2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. 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 5-Methyl-2-benzofuran-1,3-dione?
The CAS number of 5-Methyl-2-benzofuran-1,3-dione is 19438-61-0.
What are the molecular formula and molecular weight of 5-Methyl-2-benzofuran-1,3-dione?
5-Methyl-2-benzofuran-1,3-dione has molecular formula C9H6O3 and molecular weight 162.142 g/mol.
Is 5-Methyl-2-benzofuran-1,3-dione hazardous?
5-Methyl-2-benzofuran-1,3-dione has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of 5-Methyl-2-benzofuran-1,3-dione?
For 5-Methyl-2-benzofuran-1,3-dione, Upstream Products: 4-Chlorotoluene, 4-Methylphthalic acid, 1,2,3,6-Tetrahydro-4-methylphthalic anhydride; Downstream Products: 4-Methylphthalimide, 2,6-Dimethylanthraquinone, 2-Methylanthraquinone.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "5-Methyl-2-benzofuran-1,3-dione (CAS 19438-61-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-27122-7 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.