The Harm of Silane
Oct. 24, 2020
Silane is a colorless gas that reacts with air and can cause suffocation. The gas usually burns in contact with air and emits dense white amorphous silica fumes. Its primary hazard to health is that its spontaneous flame can cause severe thermal burns, which can even be fatal if severe. If flame or high temperature acts on a certain part of the silane cylinder, the cylinder will explode before the safety valve is activated. If the pressure is too high or the speed is too fast when the silane is discharged, it will cause a hysteresis explosion. If the leaked silane does not ignite spontaneously, it will be very dangerous. Keep it away. Personnel dealing with emergency situations must have personal protective equipment and fire protection adapted to the situation. Do not try to extinguish the fire before cutting off the gas supply.
Silane gas is an indispensable material in the production process of solar cells because it is the most effective way to attach silicon molecules to the surface of the battery. In an environment above 400°C, silane gas decomposes into gaseous silicon and hydrogen. After the hydrogen is burned, pure silicon is left. In addition, silane gas can be said to be everywhere. In addition to the photovoltaic industry, there are many manufacturing plants that require silane gas, such as flat panel displays, semiconductors, and even coated glass manufacturing plants.
The most important hazards and effects:
Eye contact: Diphenylsilane can irritate the eyes. The decomposition of silane produces amorphous silica. Eye contact with amorphous silica particles can cause irritation.
1. Inhalation of high concentrations of silane can cause headache, nausea, dizziness and irritate the upper respiratory tract.
2. Silane can irritate the respiratory system and mucous membranes. Excessive inhalation of silane can cause pneumonia and kidney disease due to the presence of crystalline silica.
Eye contact: Rinse immediately with water for at least 15 minutes, not too fast, and open eyelids at the same time. Make the victims "0" shaped eyes, and immediately seek ophthalmological treatment.
3. Exposure to high concentrations of gas can also cause thermal burns due to spontaneous combustion. Ingestion: Ingestion is unlikely to be a way of exposure to silane.
Skin contact: Silane can irritate the skin. The decomposition of silane produces amorphous silica. Skin contact with amorphous silica particles can cause irritation.