Crystalline silicon is steel gray, amorphous silicon is black. Non-toxic, tasteless. D2.33; Melting point 1410℃; Average heat capacity (16 ~ 100℃) 0.1774cal /(g -℃). Crystalline silicon is an atomic crystal, hard and shiny, and is typical of semiconductors. At room temperature, in addition to hydrogen fluoride, it is difficult to react with other substances, insoluble in water, nitric acid and hydrochloric acid, soluble in hydrofluoric acid and lye. It can combine with oxygen and other elements at high temperatures. It has the characteristics of high hardness, no water absorption, heat resistance, acid resistance, wear resistance and aging resistance. Silicon is widely distributed in nature and contains about 27.6% in the Earth’s crust. Mainly in the form of silica and silicates.
Silicon metal itself is non-toxic to the human body, but in the process of processing will produce fine silicon dust, has a stimulating effect on the respiratory tract. Wear appropriate protective equipment such as masks, gloves, and eye protection when handling silicon metal.
Oral LDso of rats: 3160mg/kg. High concentration inhalation causes mild irritation of respiratory tract and irritants when it enters the eye as a foreign body. Silicon powder reacts violently with calcium, cesium carbide, chlorine, diamond fluoride, fluorine, iodine trifluoride, manganese trifluoride, rubidium carbide, silver fluoride, potassium sodium alloy. Dust is moderately dangerous when exposed to flame or contact with oxidants. Store in cool, dry and well-ventilated warehouse. Keep away from fire and heat. The package should be sealed and not in contact with air. Should be stored separately from oxidizers, and do not mix.
In addition, silicon metal will react with oxygen in the air to produce flammable gas, and attention should be paid to avoid contact with fire sources or oxidants during storage and transportation.
Post time: Nov-29-2024
