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potassium fluo(ro)silicate;potassium silicofluorid

Source: http://www.heqichem.com/news/10.html   Release time: 2018-11-06

White crystals or powder. No smell, no taste. The relative density of hexagonal crystal system is 3.08. Cubic crystal system crystallization relative density 2.665 (17 ℃). Slightly acidic. Hygroscopic. Slightly soluble in water. Soluble in hydrochloric acid, solubility increases slightly with increasing temperature. Insoluble in alcohol. Hydrolysis into potassium fluoride, hydrogen fluoride and silicic acid in hot water. It is decomposed into potassium fluoride and silicon tetrafluoride when burned. Poisonous.

Name edit Chinese name: potassium fluosilicate English name: potassium fluo (ro) silicate; Potassium silicofluoride


Structure or formula K2SiF6


The molecular weight of 220.26


Density of 2.665 g/mL at 25 ° C (lit.)


Solubility is insoluble in water and ethanol.


Used for wood preservation, ceramic manufacture, aluminum and magnesium smelting, agricultural pesticides, optical glass manufacturing, synthetic mica and enamel manufacturing.


Preparation or source is obtained by neutralizing fluosilicic acid with potassium carbonate or potassium hydroxide or precipitating with potassium chloride or potassium sulfate.


A white crystal or powder with chemical properties. No smell, no taste. The relative density of hexagonal crystal system is 3.08. Cubic crystal system crystallization relative density 2.665 (17 ℃). Slightly acidic. Hygroscopic. Slightly soluble in water. Soluble in hydrochloric acid, solubility increases slightly with increasing temperature. Insoluble in alcohol. Hydrolysis into potassium fluoride, hydrogen fluoride and silicic acid in hot water. It is decomposed into potassium fluoride and silicon tetrafluoride when burned. Poisonous.


Safety does not burn, toxic. Dust can be toxic if taken or inhaled. Dust can strongly stimulate the eyes and respiratory system. React with acid, giving off irritating and corrosive hydrogen fluoride and silicon tetrafluoride gases. Skin contact: remove contaminated clothing and rinse with plenty of running water. Eye contact: lift the eyelid immediately and rinse thoroughly with plenty of water or saline for at least 15 minutes. Go to a doctor. Inhalation: quickly leave the scene to the fresh air. Keep airway clear. If breathing is difficult, give oxygen. If breathing stops, begin artificial respiration immediately. Go to a doctor. Ingestion: drink enough warm water to induce vomiting. Go to a doctor. Closed operation, local exhaust. Prevent dust from being released into the air of the workshop. Operators must be specially trained to strictly follow operating procedures. Operators are advised to wear self-filtering dust respirator, chemical safety protective glasses, infiltration protective overalls and latex gloves. Avoid dust. Avoid contact with oxidants and acids. Equipped with emergency leakage treatment equipment. An empty container may contain harmful residue. Packing and storage are packed in woven bags with two layers of polyethylene plastic bags, each of which weighs 40kg net. The package should be clearly marked with "drugs". Store in a cool and ventilated warehouse. Stay away from fire and heat. Keep out direct sunlight. Packing sealed. Should be stored separately with oxidizer, acid, food chemicals, do not mix storage. Suitable materials should be provided in the storage area to hold the leakage. Do not mix with food. Handle with care during loading and unloading to prevent packing damage. Belong to drug. Code: GB 6.1 class 61514. UN NO. 2655; IMDG CODE class 6250, class 6.1. React with acid to release corrosive fumes. Toxic gases are released by high thermal decomposition. Extinguishing method: extinguishing agent: spray water, foam, dry powder, carbon dioxide, sand.

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