Tetrachlorophthalic anhydride

The Tetrachlorophthalic anhydride, with the cas registry number 117-08-8, has the IUPAC name of 4,5,6,7-tetrachloro-2-benzofuran-1,3-dione. And its product categories are including Intermediates of Dyes and Pigments; Phthalic Acids, Esters and Derivatives; Organics; Anhydride Monomers; Monomers; Polymer Science. This is a kind of white needle-like crystals or powder with no odour, and it is soluble in dioxane while insoluble in ether. Being sensitive to moisture, it is stable chemically but incompatible with strong oxidizing agents.

The characteristics of this chemical are as follows: (1)ACD/LogP: 3.56; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 3.56; (4)ACD/LogD (pH 7.4): 3.56; (5)ACD/BCF (pH 5.5): 297.44; (6)ACD/BCF (pH 7.4): 297.44; (7)ACD/KOC (pH 5.5): 2051.46; (8)ACD/KOC (pH 7.4): 2051.46; (9)#H bond acceptors: 3; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 43.37; (13)Index of Refraction: 1.656; (14)Molar Refractivity: 55.26 cm³; (15)Molar Volume: 150.3 cm³; (16)Polarizability: 21.9 ×10^-24 cm³; (17)Surface Tension: 67.9 dyne/cm; (18)Density: 1.901 g/cm³; (19)Flash Point: 161.6 °C; (20)Enthalpy of Vaporization: 61.8 kJ/mol; (21)Boiling Point: 371 °C at 760 mmHg; (22)Vapour Pressure: 1.06E-05 mmHg at 25°C; (23)Exact Mass: 285.857205; (24)MonoIsotopic Mass: 283.860155; (25)Topological Polar Surface Area: 43.4; (26)Heavy Atom Count: 15; (27)Formal Charge: 0; (28)Complexity: 291.

As to its production method, there are one simple way to get it. The method: phthalic anhydride could react in fuming nitric acid with chlorine to produce this chemical. And as to its usage, it has a variety of applications. It could be used as responsetype fire retardant and also in polyester and epoxy resin; It could as used as the intermediate of pesticide, dye, medicine, fire resistant coating and other organic synthesis. 

When you are dealing with this chemical, you should be very cautious. For one thing, it is harmful which may cause damage to health. It may cause sensitisation by inhalation or by skin contact, and it has the risk of serious damage to eyes. For anther thing, it is dangerous for the environment which may present an immediate or delayed danger to one or more components of the environment. Being very toxic to aquatic organisms, it may cause long-term adverse effects in the aquatic environment. In addition, it is toxic that may at low levels cause damage to health. It will cause cancer.

Due to so many dangers, you should be required to take the following measures to protect yourself. Wear suitable gloves and eye/face protection and then avoid contacting with skin. If in case of contact with eyes, rinse immediately with plenty of water and seek medical advice; Or if in case of accident or if you feel unwell, seek medical advice immediately (show the label where possible). Besides, avoid exposure - obtain special instructions before use. While keeping this chemical, this material and its container must be disposed of as hazardous waste, and then remember to avoid releasing to the environment. You could also refer to special instructions/safety data sheet. 

In addition, you could convert the following datas into the molecular structure:
(1)Canonical SMILES: C12=C(C(=C(C(=C1Cl)Cl)Cl)Cl)C(=O)OC2=O
(2)InChI: InChI=1S/C8Cl4O3/c9-3-1-2(8(14)15-7(1)13)4(10)6(12)5(3)11
(3)InChIKey: AUHHYELHRWCWEZ-UHFFFAOYSA-N 

Below are the toxicity information of this chemical: