Terephthaloyl chloride
Also known as: 1,4-Benzenedicarbonyl chloride, 1,4-Benzenedicarbonyl dichloride, Terephthaloyl dichloride, p-Phthaloyl chloride, p-Phthaloyl dichloride, p-Phenylenedicarbonyl dichloride, 1,4-dichloroformylbenzene, TCl
Terephthaloyl chloride (CAS 100-20-9) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C8H4Cl2O2 and a molecular weight of 203.022 g/mol. Key properties include a melting point of 79-81 °C(lit.), a boiling point of 266.0±0.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 143.1±18.2 °C. It is classified under GHS with signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage and H331 — Toxic if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 100-20-9
- Jingsj CID
- J-32711-4
- Molecular Formula
- C8H4Cl2O2
- Molecular Weight
- 203.022 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 79-81 °C(lit.) |
|---|---|
| Boiling Point | 266.0±0.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 143.1±18.2 °C |
| Exact Mass | 201.958832 |
| PSA | 34.14000 |
| LogP | 2.63 |
| Additional Property | 7 (vs air) |
| Vapor Pressure | 0.0±0.5 mmHg at 25°C |
| Refractive Index | 1.571 |
| Additional Property | REACTS |
GHS Safety & Compliance
- H314 — Causes severe skin burns and eye damage
- H331 — Toxic if inhaled
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 Terephthaloyl chloride?
The CAS number of Terephthaloyl chloride is 100-20-9.
What are the molecular formula and molecular weight of Terephthaloyl chloride?
Terephthaloyl chloride has molecular formula C8H4Cl2O2 and molecular weight 203.022 g/mol.
Is Terephthaloyl chloride hazardous?
Terephthaloyl chloride has GHS signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage; H331 — Toxic if inhaled.
What are the upstream and downstream products of Terephthaloyl chloride?
For Terephthaloyl chloride, Upstream Products: Terephthalic acid, 4-Iodobenzoyl chloride, N,N-Dimethylaniline; Downstream Products: 1,4-Bis(dimethylchlorosilyl)benzene, 5-NITRO-2-(4-(5-NITRO-1H-BENZO[D]IMIDAZOL-2-YL)PHENYL)-1H-BENZO[D]IMIDAZOLE, 1,4-Bis(4-methyl-5-phenyl-2-oxazolyl)benzene.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Terephthaloyl chloride (CAS 100-20-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-32711-4 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.