Ammonium Bifluoride

Ammonium Bifluoride

Basic Information:

CAS Number: 1341‑49‑7
Product Code: A801044
Molecular Formula: NH₄HF₂
Molecular Weight: 57.07 g/mol

Appearance & Properties

• Appearance: White to off-white crystalline solid or flakes
• Odor: Odorless
• Density: ~1.50 g/cm³
• Melting Point: 125–126 °C
• Boiling / Decomposition: 230–240 °C
• Solubility: Very soluble in water; slightly soluble in alcohol

Product Description

Ammonium bifluoride is an inorganic crystalline salt composed of ammonium cations and bifluoride anions. It forms a fluoride-rich solution in water, giving it strong etching and corrosive properties similar to hydrofluoric acid. This chemical is widely used in laboratories and industry for its etching, cleaning, and surface preparation capabilities.

Applications

• Glass and ceramic etching and cleaning
• Surface preparation in electroplating and metal processing
• Intermediate in fluoride chemistry and laboratory synthesis
• Component in industrial cleaning and sterilizing agents
• Used in fluxes and metal treatment formulations

Storage & Handling

• Store in a cool, dry, and well-ventilated area
• Keep the container tightly closed when not in use
• Protect from moisture, heat, and incompatible materials
• Always use proper personal protective equipment (PPE) such as gloves, goggles, and lab coat when handling

Safety Information

Hazards:

• Corrosive; causes severe skin burns and eye damage
• Toxic if ingested or inhaled
• Reacts with moisture to release fluoride ions

Precautions:

• Avoid contact with skin, eyes, and clothing
• Work in a fume hood or well-ventilated area
• Do not store near glass or concrete due to corrosion risk

First Aid Measures:

• Skin contact: Rinse thoroughly with water and seek medical attention
• Eye contact: Flush with water for 15–20 minutes and get urgent medical care
• Inhalation: Move to fresh air; seek medical attention if symptoms persist
• Ingestion: Do not induce vomiting; seek immediate medical help

Flammability: Non-flammable, but reacts with certain chemicals; handle with caution.

Note: Although sometimes marketed as safer than hydrofluoric acid, ammonium bifluoride is highly corrosive and toxic. Treat it with the same safety precautions as HF.