4-Methylphthalic acid
Also known as: 4-methylphthalic acid, 4-methyl-1,2-benzenedicarboxylic acid, 4-methylbenzene-1,2-dicarboxylic acid, 4-methylphthalate, 4MPA, 1,2-Benzenedicarboxylic acid, 4-methyl-, RARECHEM AL BO 0981, MFCD00041946, EINECS 224-333-8
4-Methylphthalic acid (CAS 4316-23-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C9H8O4 and a molecular weight of 180.157 g/mol. Key properties include a melting point of 146-148 °C(lit.), a boiling point of 390.9±30.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 204.4±21.1 °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.
- 4316-23-8
- Jingsj CID
- J-35168-8
- Molecular Formula
- C9H8O4
- Molecular Weight
- 180.157 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 146-148 °C(lit.) |
|---|---|
| Boiling Point | 390.9±30.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 204.4±21.1 °C |
| Exact Mass | 180.042252 |
| PSA | 74.60000 |
| LogP | 1.27 |
| Vapor Pressure | 0.0±0.9 mmHg at 25°C |
| Refractive Index | 1.603 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2917399090 |
|---|---|
| Summary | 2917399090 aromatic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives。Supervision conditions:None。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 4-Methylphthalic acid?
The CAS number of 4-Methylphthalic acid is 4316-23-8.
What are the molecular formula and molecular weight of 4-Methylphthalic acid?
4-Methylphthalic acid has molecular formula C9H8O4 and molecular weight 180.157 g/mol.
Is 4-Methylphthalic acid hazardous?
4-Methylphthalic acid has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Methylphthalic acid (CAS 4316-23-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-35168-8 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.