Substance profile
Tetrachlorophthalic anhydride
Tetrachlorophthalic anhydride is prisms, needles from sublimation and is odorless.
01 · Identification
What Tetrachlorophthalic anhydride is
Tetrachlorophthalic anhydride is prisms, needles from sublimation and is odorless. Its molecular formula is C8Cl4O3 and its molecular weight is 285.9 g/mol. It boils at 371 °C, melts at 255 °C, is slightly soluble in water.
Under the GHS it carries the signal word Danger.
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
| Code | Hazard statement |
|---|---|
| H318 | Causes serious eye damage. |
| H334 | May cause allergy or asthma symptoms or breathing difficulties if inhaled. |
| H317 | May cause an allergic skin reaction. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P261, P272, P273, P280, P305, P310, P313, P333, P338, P391, P501
03 · Physical and chemical properties
Tetrachlorophthalic anhydride properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 371 °C (699.8 °F) | HSDB | |
| 371.11 °C (700 °F) | sublimes, at 760 mmHg | CAMEO | |
| Melting point | 255 °C (491 °F) | ICSC | |
| 255.75 °C (492.4 °F) | range, midpoint shown | HSDB | |
| 255.83 °C (492.5 °F) | range, midpoint shown | CAMEO | |
| Density | 1.49 g/cm³ | at 275 °C | CAMEO |
| Solubility | SLIGHTLY SOLUBLE IN ETHER | HSDB | |
| SLIGHTLY SOL IN WATER | HSDB | ||
| less than 1 mg/mL at 70 °F (NTP, 1992) | at 21.11 °C | CAMEO | |
| Flash point | 362 °C (683.6 °F) | ICSC |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Tetrachlorophthalic anhydride
Reactivity
TETRACHLOROPHTHALIC ANHYDRIDE reacts exothermically with water. This reaction is expected to be slow, but can become vigorous if local heating accelerates it. Reaction with water is accelerated by acids. Incompatible with acids, strong oxidizing agents, alcohols, amines, and bases.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Tetrachlorophthalic… in the storage compatibility matrix →