Tetrachlorophthalic Anhydride, with the CAS number 117 - 08 - 8, is a high - quality chemical product. Its molecular formula is C₈Cl₄O₃, and the molecular weight is approximately 285.9 g/mol. It appears as a white to light yellow crystalline powder. It has a melting point in the range of 254 - 257°C and a boiling point of around 465.2°C at 760 mmHg. The density of Tetrachlorophthalic Anhydride is about 1.905 g/cm³. It is sparingly soluble in water but soluble in some organic solvents such as acetone and benzene.
Tetrachlorophthalic Anhydride has a wide range of applications in various industries. In the polymer industry, it is used as a flame retardant. It can be incorporated into polymers such as polyesters and epoxies during the manufacturing process. When these polymers are exposed to high - temperature or fire conditions, the Tetrachlorophthalic Anhydride releases chlorine - containing compounds, which can inhibit the combustion process by interfering with the free - radical reactions that sustain the fire.
In the pesticide industry, it serves as an important intermediate. It can be used to synthesize a variety of pesticides with high efficiency and low toxicity. These pesticides are effective in controlling pests and protecting crops, thereby improving agricultural yields.
It is also used in the production of dyes and pigments. It can react with other chemical substances to form new compounds with unique color - producing properties, which are used in the textile, printing, and painting industries.
When using Tetrachlorophthalic Anhydride, proper safety precautions must be taken. Wear appropriate personal protective equipment, including chemical - resistant gloves, goggles, and a respirator if necessary.
In the laboratory or industrial settings, it should be stored in a cool, dry, and well - ventilated place away from incompatible substances such as strong oxidizing agents, acids, and bases. When handling, avoid direct contact with skin and eyes. In case of accidental contact, immediately rinse the affected area with plenty of water and seek medical attention if necessary.
During the manufacturing process, accurate weighing and measuring should be carried out according to the specific formulation requirements. It should be added to the reaction system in a controlled manner to ensure the stability and quality of the final product.
Case 1: Polymer Flame Retardancy
A plastic manufacturing company was facing challenges with the flammability of its polyester products. They decided to incorporate Tetrachlorophthalic Anhydride into their polyester resin formula. By adding a specific percentage (e.g., 5% by weight) of Tetrachlorophthalic Anhydride during the resin synthesis process, they were able to significantly improve the flame - retardant properties of the final polyester products. The products passed strict fire - safety tests and were well - received in the market, leading to an increase in sales and customer satisfaction.
Case 2: Pesticide Synthesis
A pesticide research and development company used Tetrachlorophthalic Anhydride as an intermediate to synthesize a new type of insecticide. Through a series of chemical reactions and optimization processes, they developed an insecticide that was highly effective against a specific type of agricultural pest. Field trials showed that the new insecticide reduced pest infestation rates by more than 80% compared to traditional pesticides, resulting in a significant increase in crop yields for farmers who used it.
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