Terephthalic acid
Also known as: 1,4-Benzenedicarboxylic acid, p-Phthalic acid, Benzene-1,4-dicarboxylic acid, PTA, Purified terephthalic acid, TPA, p-Benzenedicarboxylic acid, EINECS 202-830-0, MFCD00002558
Terephthalic acid (CAS 100-21-0) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H6O4 and a molecular weight of 166.13100 g/mol. Key properties include a melting point of 300 °C, a boiling point of 392.4ºC at 760 mmHg, a density of 1,51 g/cm3 and a flash point of 260°C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 100-21-0
- Jingsj CID
- J-31602-9
- Molecular Formula
- C8H6O4
- Molecular Weight
- 166.13100 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 300 °C |
|---|---|
| Boiling Point | 392.4ºC at 760 mmHg |
| Density | 1,51 g/cm3 |
| Flash Point | 260°C |
| Exact Mass | 166.02700 |
| PSA | 74.60000 |
| LogP | 1.08300 |
| Vapor Pressure | 1.83E-15mmHg at 25°C |
| Refractive Index | 1.648 |
Activity & Biological Data
| Target | Human Endogenous Metabolite |
|---|---|
| Additional Information | [1]. Heck HD, et al. The induction of bladder stones by terephthalic acid, dimethyl terephthalate, and melamine (2,4,6-triamino-s-triazine) and its relevance to risk assessment. Regul Toxicol Pharmacol. 1985 Sep;5(3):294-313. |
Customs & Trade Information
| HS Code | 2917361100 |
|---|---|
| Summary | 2917361100 terephthalic acid。Supervision conditions:None。VAT:17.0%。Tax rebate rate:13.0%。Lowest tariff:6.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Terephthalic acid?
The CAS number of Terephthalic acid is 100-21-0.
What are the molecular formula and molecular weight of Terephthalic acid?
Terephthalic acid has molecular formula C8H6O4 and molecular weight 166.13100 g/mol.
What are the upstream and downstream products of Terephthalic acid?
For Terephthalic acid, Upstream Products: p-Xylene, Terephthalaldehyde, 4-Methylbenzoic acid; Downstream Products: trans-1,4-cyclohexanedimethanol, 1,4-Bis(trifluoromethyl)benzene, 4-(trifluoromethyl)benzoyl fluoride.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Terephthalic acid (CAS 100-21-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-31602-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.