3,4,5,6-Tetrachlorophthalonitrile
Also known as: 3,4,5,6-Tetrachlorobenzene-1,2-dicarbonitrile, Tetrachlorophthalonitrile, Perchlorophthalonitrile, Tetrachlorophthalodinitrile, 1,2-Dicyano-3,4,5,6-tetrachlorobenzene, 3,4,5,6-Tetrachloro-1,2-benzenedicarbonitrile, Tetrachloro-o-phthalodinitrile
3,4,5,6-Tetrachlorophthalonitrile (CAS 1953-99-7) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C8Cl4N2 and a molecular weight of 265.91100 g/mol. Key properties include a melting point of 249-252 °C (dec.)(lit.), a boiling point of 353.9ºC at 760 mmHg, a density of 1.71 g/cm3 and a flash point of 156ºC. It is classified under GHS with signal word Warning and hazard statements H312 — Harmful in contact with skin and H332 — Harmful if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 1953-99-7
- Jingsj CID
- J-1104345-1
- Molecular Formula
- C8Cl4N2
- Molecular Weight
- 265.91100 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 249-252 °C (dec.)(lit.) |
|---|---|
| Boiling Point | 353.9ºC at 760 mmHg |
| Density | 1.71 g/cm3 |
| Flash Point | 156ºC |
| Exact Mass | 263.88200 |
| PSA | 47.58000 |
| LogP | 4.04356 |
| Vapor Pressure | 3.48E-05mmHg at 25°C |
| Refractive Index | 1.632 |
GHS Safety & Compliance
- H312 — Harmful in contact with skin
- H332 — Harmful if inhaled
Customs & Trade Information
| HS Code | 2926909090 |
|---|---|
| Summary | HS:2926909090 other nitrile-function compounds VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 3,4,5,6-Tetrachlorophthalonitrile?
The CAS number of 3,4,5,6-Tetrachlorophthalonitrile is 1953-99-7.
What are the molecular formula and molecular weight of 3,4,5,6-Tetrachlorophthalonitrile?
3,4,5,6-Tetrachlorophthalonitrile has molecular formula C8Cl4N2 and molecular weight 265.91100 g/mol.
Is 3,4,5,6-Tetrachlorophthalonitrile hazardous?
3,4,5,6-Tetrachlorophthalonitrile has GHS signal word Warning and hazard statements H312 — Harmful in contact with skin; H332 — Harmful if inhaled.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3,4,5,6-Tetrachlorophthalonitrile (CAS 1953-99-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1104345-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.