3,6-Dichlorophthalic anhydride
Also known as: 4,7-dichloroisobenzofuran-1,3-dione, 4,7-dichlorophthalic anhydride, 1,3-Isobenzofurandione, 4,7-dichloro-, 4,7-Dichloro-1,3-isobenzofurandione, 4,7-Dichloro-2-benzofuran-1,3-dione, 3,6-Dichloro-phthalic anhydride, 4,7-dichloro-1,3-dihydro-2-benzofuran-1,3-dione, 3,6-dichloro-phthalic acid anhydride, 3,6-Dichlor-phthalsaeure-anhydrid
3,6-Dichlorophthalic anhydride (CAS 4466-59-5) 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 188-190 °C(lit.), a boiling point of 339.0±22.0 °C at 760 mmHg, a density of 1.7±0.1 g/cm3 and a flash point of 159.3±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.
- 4466-59-5
- Jingsj CID
- J-14819-6
- 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 | 188-190 °C(lit.) |
|---|---|
| Boiling Point | 339.0±22.0 °C at 760 mmHg |
| Density | 1.7±0.1 g/cm3 |
| Flash Point | 159.3±21.3 °C |
| Exact Mass | 215.938095 |
| PSA | 43.37000 |
| LogP | 2.72 |
| 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 3,6-Dichlorophthalic anhydride?
The CAS number of 3,6-Dichlorophthalic anhydride is 4466-59-5.
What are the molecular formula and molecular weight of 3,6-Dichlorophthalic anhydride?
3,6-Dichlorophthalic anhydride has molecular formula C8H2Cl2O3 and molecular weight 217.006 g/mol.
Is 3,6-Dichlorophthalic anhydride hazardous?
3,6-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 3,6-Dichlorophthalic anhydride?
For 3,6-Dichlorophthalic anhydride, Upstream Products: 3-Chlorophthalic anhydride, Tetrachlorophthalic Acid Hemihydrate, Tetrachlorophthalic anhydride; Downstream Products: 1,4,5,8-Tetrachloroanthraquinone, 1,4-Dichloro-5,8-dihydroxyanthraquinone.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3,6-Dichlorophthalic anhydride (CAS 4466-59-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-14819-6 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.