Neutral Ammonium Fluoride
Neutral Ammonium Fluoride (NH4F) is a high-purity inorganic compound widely used in industrial and laboratory applications. With excellent solubility and stability, it serves as an essential material for glass etching, metal surface treatment, and chemical synthesis.
Product Specifications
- Chemical Formula: NH4F
- Appearance: White crystalline powder
- Purity: ≥98.0%
- Molecular Weight: 37.04 g/mol
- Density: 1.50 g/cm³
- Melting Point: 238°C (decomposes)
- Solubility: Highly soluble in water (45.3 g/100 mL at 20°C)
- pH Value: 6.5-7.5 (5% solution)
Technical Parameters
| Parameter | Value | Test Method |
|---|---|---|
| Fluoride Content (as F) | ≥48.5% | GB/T 1279 |
| Chloride (Cl) Content | ≤0.005% | ICP-OES |
| Sulfate (SO₄) Content | ≤0.01% | Gravimetric Method |
| Heavy Metals (as Pb) | ≤5 ppm | AAS |
| Iron (Fe) Content | ≤10 ppm | Colorimetric Method |
| Moisture Content | ≤0.5% | Karl Fischer |
Applications
- Metal surface treatment and cleaning
- Glass etching and frosting
- Catalyst in chemical synthesis
- Analytical reagent in laboratories
- Wood preservative component
- Electronic industry applications
Neutral Ammonium Fluoride FAQ
Q: What safety precautions should be taken when handling Neutral Ammonium Fluoride?
A: Always wear appropriate PPE including chemical-resistant gloves, safety goggles, and protective clothing. Work in well-ventilated areas and avoid inhalation or skin contact. Neutral Ammonium Fluoride can cause severe skin burns and eye damage. Have emergency eyewash stations and safety showers available in the work area.
Q: How should Neutral Ammonium Fluoride be stored?
A: Store in tightly sealed containers in a cool, dry, well-ventilated area away from incompatible materials such as strong acids, bases, and metals. Keep containers tightly closed when not in use. Storage temperature should be maintained below 30°C (86°F). Neutral Ammonium Fluoride should be kept separate from food and beverages.
Q: What is the shelf life of Neutral Ammonium Fluoride?
A: When properly stored in original packaging under recommended conditions, Neutral Ammonium Fluoride typically has a shelf life of 24 months from the date of manufacture. The product should be protected from moisture and humidity to prevent caking and degradation. Always inspect the material before use and check for any signs of discoloration or contamination.
Packaging Options
| Package Type | Weight | Material |
|---|---|---|
| Plastic Bottles | 500g, 1kg | HDPE |
| Drums | 25kg, 50kg | Plastic Lined |
| Custom Packaging | As required | Various |
Neutral Ammonium Fluoride Characteristics
The neutral pH range of this ammonium fluoride formulation makes it particularly suitable for applications requiring precise control of acidity. Unlike acidic ammonium fluoride solutions, our Neutral Ammonium Fluoride minimizes equipment corrosion while maintaining excellent etching performance.
Additional FAQ
Q: Can Neutral Ammonium Fluoride be used for dental applications?
A: While ammonium fluoride compounds have been used in some dental products, our industrial-grade Neutral Ammonium Fluoride is not certified or recommended for dental or medical applications. Pharmaceutical-grade materials with appropriate certifications should be used for any medical or dental purposes.
Q: What is the difference between Neutral Ammonium Fluoride and Ammonium Bifluoride?
A: Neutral Ammonium Fluoride (NH4F) is a single salt, while ammonium bifluoride (NH4HF2) contains additional hydrogen fluoride. The neutral version has higher pH (6.5-7.5) compared to the acidic bifluoride (pH ~3). Neutral Ammonium Fluoride is generally safer to handle but may require different concentrations for equivalent performance in some applications.
Q: How does temperature affect Neutral Ammonium Fluoride solutions?
A: Neutral Ammonium Fluoride solubility increases with temperature - approximately 83g/100mL at 100°C compared to 45g/100mL at 20°C. Higher temperature solutions may etch faster but require careful handling due to increased volatility. Always prepare solutions at room temperature first, then heat gradually if needed, with proper ventilation.
Quality Assurance
Our Neutral Ammonium Fluoride undergoes rigorous quality control testing including:
- Purity verification by titration
- ICP-MS analysis for trace metals
- Moisture content determination
- Particle size distribution testing
- Batch consistency evaluation