Chemical Name: Ammonium Fluoride
CAS Number: 7784-18-1
Molecular Formula: NH₄F
Molar Mass: 37.04 g/mol
Appearance: White crystalline solid
Solubility: Soluble in water, forming a mildly acidic solution
Overview
Ammonium Fluoride is an inorganic compound composed of ammonia and hydrogen fluoride. In its solid form, it appears as a white crystalline substance that is highly soluble in water. It is primarily used in industrial, chemical, and laboratory environments and is available in ACS (American Chemical Society) grade for high-purity applications.
Common Uses and Applications
1. Glass Etching and Surface Treatment
Ammonium Fluoride is frequently used in the glass industry for etching and frosting applications. When combined with other fluorides, it helps to achieve precise, controlled surface finishes on glass and silica-based materials.
2. Metal Surface Cleaning
Due to its ability to react with oxides and other impurities, Ammonium Fluoride is used to clean and prepare metal surfaces, especially in processes that require a reactive fluoride ion for the removal of rust or scale.
3. Chemical Synthesis
In organic and inorganic synthesis, Ammonium Fluoride acts as a source of fluoride ions. It is utilized in the preparation of fluorinated compounds and serves as a reagent in various catalytic and synthetic applications.
4. Etching in Semiconductor Manufacturing
In microelectronics and semiconductor fabrication, it is used for etching silicon nitride and silicon oxide layers. It plays a critical role in photolithographic processes where high precision is required.
5. Analytical Chemistry
Ammonium Fluoride (ACS grade) is used in analytical chemistry as a buffer component and for complexation in sample preparation. Its high purity makes it suitable for use in laboratories and research settings.
Handling and Storage
– Storage: Store in a cool, dry, well-ventilated area in tightly sealed containers. Avoid exposure to moisture and incompatible materials such as strong acids.
– Safety Precautions: Handle with care. Use appropriate personal protective equipment (PPE), including gloves, safety goggles, and lab coats. Avoid inhalation of dust or contact with skin and eyes.
– Stability: Stable under recommended storage conditions but may emit toxic fumes upon decomposition.
Regulatory and Safety Information
– CAS Number: 7784-18-1
– Hazard Classification: Irritant; may cause serious eye and skin irritation.
– Transport Regulations: Follow local and international transport guidelines for chemical substances.
– Disposal Considerations: Dispose of in accordance with local, regional, and national regulations for hazardous waste.
Summary
Ammonium Fluoride (ACS, CAS: 7784-18-1) is a versatile chemical used in various industrial and scientific applications ranging from glass etching to advanced material processing in semiconductor manufacturing. Its reactive nature and high purity make it essential in environments where precision and performance are critical.
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