| M Formula: | C6Cl4(CO2H)2 |
| Properties: | |
| Colorless, crystalline plates. Soluble in hot water; sparingly soluble in cold water. | |
| Derivation: | |
| By passing a stream of chlorine through a mixture of phthalic anhydride and antimony pentachloride. | |
| Use: | |
| Dyes, intermediates. | |