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What should be noted when using ammonium fluorosilicate
info：www.crimea-realty.net | Release time：2026-11-10
Ammonium fluorosilicate is a fluorine-containing inorganic hazardous chemical that appears as white crystals. Its aqueous solution is acidic and corrosive, releasing hydrogen fluoride when exposed to acid. It is widely used in glass etching, ceramics, wood anti-corrosion, metal surface treatment, insect repellent, and other applications. The entire process of operation, storage, feeding, and waste liquid disposal must strictly implement protection and control requirements to prevent the risks of corrosion, poisoning, and burns.
1. Personal protective requirements
Operators must wear acid resistant rubber gloves, goggles or face shields, acid and alkali resistant protective clothing, and dust masks/half face masks; Do not touch solids and solutions with bare hands. Inhalation of dust can harm the respiratory tract, and contact with the skin and eyes can cause chemical burns; Immediately rinse with plenty of flowing water if skin is contaminated. If it splashes into the eyes, rinse with water and seek medical attention promptly. Eating and smoking are strictly prohibited at the work site.
2. Compatibility and reaction taboos
It is strictly prohibited to mix with strong acids (such as hydrochloric acid, sulfuric acid, etc.), as they can easily decompose and produce hydrogen fluoride gas. Hydrogen fluoride is highly corrosive and can cause difficult to heal fluoride burns; Do not come into contact with alkalis, lime, or carbonates as they may cause violent reactions and reduce the efficacy of the medicine; Avoid coexisting with metal ion materials such as calcium and magnesium, which can easily lead to the formation of insoluble fluoride precipitates.
3. Precautions for feeding and process operation
To prevent dust from flying during solid feeding, closed feeding and negative pressure dust removal devices should be prioritized; When preparing an aqueous solution, ammonium fluorosilicate should be slowly added to water and stirred to dissolve. It is forbidden to directly add water to the solid to prevent local overheating and splashing. Control the pH of the solution, with a suitable range of acidity; Under high temperature conditions, it will accelerate decomposition and release hydrogen fluoride and ammonia gas. Long term heating should be avoided.
4. Key points of storage control
Sealed storage in a cool, dry, and ventilated warehouse, away from heat sources and sparks; Separate storage from acids, alkalis, food ingredients, and oxidants, and set up leak proof trays. Use corrosion-resistant plastic drums for packaging to prevent moisture and clumping; The warehouse should be well sealed to prevent rainwater and flushing water from seeping in.
5. Emergency response to leakage
Minor leakage: Wear full protective gear, collect with dry sand and inert adsorbent materials, and put into a dedicated hazardous waste bin. Do not rinse directly with water (rinsing will expand the pollution range); When there is a large leakage, isolate the scene, evacuate unrelated personnel, block runoff, and prevent it from flowing into sewers and water bodies.
6. Disposal of wastewater and waste residue
Ammonium fluorosilicate contains fluoride ions and is classified as fluoride contaminated hazardous waste, which cannot be directly discharged. Waste liquid and residue need to be collected and handed over to qualified units for treatment. Generally, calcium salt precipitation method is used to treat fluoride ions, and they can only be discharged after meeting the standards.
7. Other safety reminders
This product has a corrosive effect on glass, ceramics, and ordinary carbon steel. Fluorine resistant materials such as PP and PE are preferred for equipment and pipelines; Regularly inspect the corrosion status of equipment that has been in long-term contact; If you experience chest tightness or coughing discomfort due to inhaling dust, immediately move to a place with fresh air and seek medical attention.
1. Personal protective requirements
Operators must wear acid resistant rubber gloves, goggles or face shields, acid and alkali resistant protective clothing, and dust masks/half face masks; Do not touch solids and solutions with bare hands. Inhalation of dust can harm the respiratory tract, and contact with the skin and eyes can cause chemical burns; Immediately rinse with plenty of flowing water if skin is contaminated. If it splashes into the eyes, rinse with water and seek medical attention promptly. Eating and smoking are strictly prohibited at the work site.
2. Compatibility and reaction taboos
It is strictly prohibited to mix with strong acids (such as hydrochloric acid, sulfuric acid, etc.), as they can easily decompose and produce hydrogen fluoride gas. Hydrogen fluoride is highly corrosive and can cause difficult to heal fluoride burns; Do not come into contact with alkalis, lime, or carbonates as they may cause violent reactions and reduce the efficacy of the medicine; Avoid coexisting with metal ion materials such as calcium and magnesium, which can easily lead to the formation of insoluble fluoride precipitates.
3. Precautions for feeding and process operation
To prevent dust from flying during solid feeding, closed feeding and negative pressure dust removal devices should be prioritized; When preparing an aqueous solution, ammonium fluorosilicate should be slowly added to water and stirred to dissolve. It is forbidden to directly add water to the solid to prevent local overheating and splashing. Control the pH of the solution, with a suitable range of acidity; Under high temperature conditions, it will accelerate decomposition and release hydrogen fluoride and ammonia gas. Long term heating should be avoided.
4. Key points of storage control
Sealed storage in a cool, dry, and ventilated warehouse, away from heat sources and sparks; Separate storage from acids, alkalis, food ingredients, and oxidants, and set up leak proof trays. Use corrosion-resistant plastic drums for packaging to prevent moisture and clumping; The warehouse should be well sealed to prevent rainwater and flushing water from seeping in.
5. Emergency response to leakage
Minor leakage: Wear full protective gear, collect with dry sand and inert adsorbent materials, and put into a dedicated hazardous waste bin. Do not rinse directly with water (rinsing will expand the pollution range); When there is a large leakage, isolate the scene, evacuate unrelated personnel, block runoff, and prevent it from flowing into sewers and water bodies.
6. Disposal of wastewater and waste residue
Ammonium fluorosilicate contains fluoride ions and is classified as fluoride contaminated hazardous waste, which cannot be directly discharged. Waste liquid and residue need to be collected and handed over to qualified units for treatment. Generally, calcium salt precipitation method is used to treat fluoride ions, and they can only be discharged after meeting the standards.
7. Other safety reminders
This product has a corrosive effect on glass, ceramics, and ordinary carbon steel. Fluorine resistant materials such as PP and PE are preferred for equipment and pipelines; Regularly inspect the corrosion status of equipment that has been in long-term contact; If you experience chest tightness or coughing discomfort due to inhaling dust, immediately move to a place with fresh air and seek medical attention.
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