4,5-dichlorophthalic anhydride
Also known as: 1,3-Isobenzofurandione, 5,6-dichloro-, 5,6-dichloro-1,3-isobenzofurandione, 5,6-Dichloro-2-benzofuran-1,3-dione, 5,6-dichloroisobenzofuran-1,3-dione, 4,5-Dichlorophalic anhydride, 4,5-dichloro-phthalic acid anhydride, 5,6-dichlorophthalic anhydride, EINECS 213-386-2, MFCD00075034
4,5-dichlorophthalic anhydride (CAS 942-06-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H2Cl2O3 and a molecular weight of 217.006 g/mol. Key properties include a melting point of 185-187 °C(lit.), a boiling point of 313.0±22.0 °C at 760 mmHg, a density of 1.7±0.1 g/cm3 and a flash point of 144.8±21.3 °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.
- 942-06-3
- Jingsj CID
- J-1363256-9
- Molecular Formula
- C8H2Cl2O3
- Molecular Weight
- 217.006 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 185-187 °C(lit.) |
|---|---|
| Boiling Point | 313.0±22.0 °C at 760 mmHg |
| Density | 1.7±0.1 g/cm3 |
| Flash Point | 144.8±21.3 °C |
| Exact Mass | 215.938095 |
| PSA | 43.37000 |
| LogP | 2.66 |
| Vapor Pressure | 0.0±0.7 mmHg at 25°C |
| Refractive Index | 1.638 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2932999099 |
|---|---|
| Summary | 2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of 4,5-dichlorophthalic anhydride?
The CAS number of 4,5-dichlorophthalic anhydride is 942-06-3.
What are the molecular formula and molecular weight of 4,5-dichlorophthalic anhydride?
4,5-dichlorophthalic anhydride has molecular formula C8H2Cl2O3 and molecular weight 217.006 g/mol.
Is 4,5-dichlorophthalic anhydride hazardous?
4,5-dichlorophthalic anhydride 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 4,5-dichlorophthalic anhydride?
For 4,5-dichlorophthalic anhydride, Upstream Products: 4,5-Dichlorophthalic acid, Phthalic acid, Phthalic anhydride; Downstream Products: Trifluoroacetic acid, 4,5-Difluorophthalic anhydride, 4,5-Difluorophthalic acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4,5-dichlorophthalic anhydride (CAS 942-06-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1363256-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.