1. Organic Synthesis
- As a fluorinating agent, used to introduce fluorine atoms (e.g., replacing halogens or hydroxyl groups).
- Participates in nucleophilic fluorination reactions (e.g., preparation of fluoroarenes).
2. Glass Etching
- Used for etching glass (compared to HF, KF is safer but less effective).
3. Metal Treatment
- Welding flux for aluminum and magnesium alloys.
4. Other Applications
- Preservative, toothpaste additive (low concentration for anti-caries).

Safety Information (GHS Labeling)
- Hazards: Toxic (oral, inhalation), Corrosive (skin/eye irritation).
- Precautions: Wear gloves, goggles, operate in a fume hood.