| Customization: | Available |
|---|---|
| CAS No.: | 16919-19-0 |
| Formula: | (Nh4)2sif6 |
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Basic Information
Product Name: Ammonium Hexafluorosilicate
Chemical Formula: (NH4)2SiF6
CAS Number: 16919-31-6
Appearance:White crystalline powder or granular solid, odorless.
Commercial products may contain trace impurities, appearing slightly off-white.
Solubility:Slightly soluble in water (≈1.2g/100 mL at 20ºC); solubility increases with temperature.Insoluble in ethanol and acetone; reacts with strong acids (e.g., sulfuric acid) to release toxic hydrogen fluoride (HF) gas.
Melting/Decomposition Point:Decomposes at≈200ºC into ammonia , silicon tetrafluoride, and hydrogen fluoride (HF):
Density: Approx. 2.01g/cm3
Applications
Agriculture (Pesticides and Fertilizers)
Insecticides/Fungicides:
Used as a herbicide and insecticide for controlling mites, scale insects, and fungal diseases in crops (e.g., fruit trees, tea plants).
Example: Sprayed on citrus trees to prevent citrus rust mites.
Fertilizers:
Provides both fluoride and nitrogen (as ammonium), but its use is restricted in some regions due to fluoride toxicity to plants and soil.
Glass and Ceramics Industry
Glass Etching:
Mixed with other fluorides to etch and frost glass surfaces (e.g., decorative glass, frosted light bulbs).
Ceramic Glazes:
Acts as a flux to lower the melting point of glazes, improving their fluidity and gloss.
Metal Treatment and Electroplating
Aluminum Surface Treatment:
Used in pickling solutions to remove oxide layers and prepare aluminum for coating or bonding.
Zinc Plating:
Improves the adhesion and uniformity of zinc coatings in certain electroplating baths.
Construction and Concrete Industry
Concrete Hardener:
Applied to concrete surfaces to react with calcium hydroxide, forming insoluble calcium fluorosilicate and enhancing surface hardness and wear resistance.
Mortar Additive:
Inhibits efflorescence (white salt deposits) in cement-based mortars.
Other Applications
Wood Preservation: Imparts resistance to insects and fungi (e.g., in outdoor wood products).
Textile Industry: Used as a mordant in dyeing to fix dyes onto fibers.
Safety
Hazards:Toxicity: Oral LD50 for rats: ≈125mg/kg (highly toxic); inhalation of dust irritates the respiratory tract.
Corrosivity: Dust or solutions irritate skin and eyes; HF released in acid reactions causes severe burns.
Environmental Risk: Fluoride ions are toxic to aquatic life and can accumulate in soil, affecting plant growth.
Safety Measures:
Wear protective gloves, goggles, and a dust mask; operate in a well-ventilated area or fume hood.
In case of skin contact, rinse with water for 15 minutes; for eye contact, flush with water and seek medical attention immediately.
Storage:
Store in tightly sealed containers in a cool, dry, ventilated area, away from acids, alkalis, and food.
Avoid moisture to prevent hydrolysis.
Handling:
Prevent dust generation during use; avoid contact with strong acids or alkalis.
Dispose of waste according to local hazardous waste regulations.
| Liquid products | Drum of 5kg ,10 kg ,25 kg ,50 kg 200 kg ,250 kg . 1000 kg IBC drum. TANK with 20 tons ,25 tons . |
| Solid products | Bag of 1 kg ,2 kg ,5 kg ,25 kg ,500kg ,1000 kg . Drum of 25 kg and 50 kg. |
Packaging can be customized according to customer requirements.
Qingdao Jinyu Chemical Co., LTD,which is located in Qingdao City, China, with registered capital of RMB 10 million, is a dynamic chemical import and export enterprise with customer demand as its own responsibility. The founder has been engaged in the chemical industry for more than 20 years. With professional technical and marketing personnel, diversified cooperative factories with synthetic technology and efficient logistics management, we provide services to customers all over the world. After years of hard work, we have selected a number of excellent chemical production cooperative enterprises in China. These enterprises have their own advantages in different chemical synthesis fields. They have passed the strict inspection of suppliers by many customers and formed a long-term and stable strategic partnership with customers. With our partners' excellent equipment, well-trained employees and mature technology, we also continue to provide customers with more products.
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