5-Methylisophthalic acid
Also known as: Uvitic acid, 5-METHYL-1,3-BENZENEDICARBOXYLIC ACID, 5-METHYLBENZENE-1,3-DICARBOXYLIC ACID, 5-METHYLISOPHTHALIC ACID, EINECS 207-881-2, MFCD00013986, RARECHEM AL BO 1540, TIMTEC-BB SBB008429
5-Methylisophthalic acid (CAS 499-49-0) 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 299-303 °C(lit.), a boiling point of 408.7±33.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 215.1±21.9 °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.
- 499-49-0
- Jingsj CID
- J-42276-4
- 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 | 299-303 °C(lit.) |
|---|---|
| Boiling Point | 408.7±33.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 215.1±21.9 °C |
| Exact Mass | 180.042252 |
| PSA | 74.60000 |
| LogP | 2.12 |
| Vapor Pressure | 0.0±1.0 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 5-Methylisophthalic acid?
The CAS number of 5-Methylisophthalic acid is 499-49-0.
What are the molecular formula and molecular weight of 5-Methylisophthalic acid?
5-Methylisophthalic acid has molecular formula C9H8O4 and molecular weight 180.157 g/mol.
Is 5-Methylisophthalic acid hazardous?
5-Methylisophthalic acid 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-Methylisophthalic acid?
For 5-Methylisophthalic acid, Upstream Products: Mesitylene, 3,5-Dimethylbenzoic acid, 1,3-DIETHYL-5-METHYLBENZENE; Downstream Products: Trimesic acid, Trimellitic acid, 5-methylisophthalonitrile.
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-Methylisophthalic acid (CAS 499-49-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-42276-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.