Product Description

Trichlorosilane (SiHCl3) is a chemical compound composed of one silicon (Si) atom bonded to three chlorine (Cl) atoms and one hydrogen (H) atom. It is a colorless, volatile liquid at room temperature. Trichlorosilane is an important precursor in the production of various silicon-based materials, particularly polysilicon, which is used in the manufacturing of semiconductors and solar cells. Here are some key points about trichlorosilane:

1. Chemical Composition: Trichlorosilane consists of one silicon (Si) atom bonded to three chlorine (Cl) atoms and one hydrogen (H) atom. Its chemical formula is SiHCl3.

2. Properties: Trichlorosilane is a volatile liquid with a boiling point of 31.8 degrees Celsius (89.2 degrees Fahrenheit) and a melting point of -127.5 degrees Celsius (-197.5 degrees Fahrenheit). It has a pungent odor and is highly reactive.

3. Production: Trichlorosilane is primarily produced through the reaction of metallurgical-grade silicon (MG-Si) with hydrogen chloride (HCl) gas:

   Si + 3HCl → SiHCl3 + H2

   This reaction typically occurs at high temperatures in the presence of a catalyst, such as copper.

4. Uses: Trichlorosilane has a significant industrial application:

   • Polysilicon Production: Trichlorosilane is a key precursor in the production of polysilicon, which is used in the manufacturing of semiconductors, solar cells, and other electronic devices. Trichlorosilane is first purified and then subjected to chemical vapor deposition (CVD) processes to form polysilicon films.

5. Safety Considerations: Trichlorosilane is toxic and flammable. It is harmful if swallowed, inhaled, or comes into contact with the skin or eyes. Trichlorosilane can also release hydrogen gas when exposed to moisture or water. Proper safety precautions, such as the use of protective equipment, good ventilation, and appropriate handling procedures, should be followed when working with trichlorosilane.

It is important to handle trichlorosilane with care and adhere to safety measures to mitigate potential risks associated with its toxicity and flammability.