Trimellitic acid
Also known as: 1,2,4-Benzenetricarboxylic acid, Benzene-1,2,4-tricarboxylic acid, 1,2,4-Tricarboxybenzene
Trimellitic acid (CAS 528-44-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C9H6O6 and a molecular weight of 210.140 g/mol. Key properties include a melting point of 229-231 °C (dec.)(lit.), a boiling point of 505.5±45.0 °C at 760 mmHg, a density of 1.7±0.1 g/cm3 and a flash point of 273.6±25.2 °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.
- 528-44-9
- Jingsj CID
- J-26306-9
- Molecular Formula
- C9H6O6
- Molecular Weight
- 210.140 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 229-231 °C (dec.)(lit.) |
|---|---|
| Boiling Point | 505.5±45.0 °C at 760 mmHg |
| Density | 1.7±0.1 g/cm3 |
| Flash Point | 273.6±25.2 °C |
| Exact Mass | 210.016434 |
| PSA | 111.90000 |
| LogP | 1.00 |
| Vapor Pressure | 0.0±1.4 mmHg at 25°C |
| Refractive Index | 1.663 |
| Additional Property | 2.1 G/100 ML (25 ºC) |
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 Trimellitic acid?
The CAS number of Trimellitic acid is 528-44-9.
What are the molecular formula and molecular weight of Trimellitic acid?
Trimellitic acid has molecular formula C9H6O6 and molecular weight 210.140 g/mol.
Is Trimellitic acid hazardous?
Trimellitic 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. "Trimellitic acid (CAS 528-44-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-26306-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.