When attempting to dissolve metal locks, concentrated nitric acid, typically around 68% nitric acid solution, is often considered. However, using nitric acid for this purpose poses significant safety and legality concerns.
**Safety Considerations:**
- Concentrated nitric acid is highly corrosive and can cause severe burns. Proper personal protective equipment (PPE) such as gloves, goggles, and face protection should be worn.
- Fumes produced by


