Related Clues:

• Zinc --
• Ill-natured
• Etching fluid
• Water or rust
• Trip agent?
• Litmus tester
• One litmus test conclusion
• Tautomeric form of vitamin C, e.g.
• Compound with a hydroxyl group
• Caustic compound
• Hydrofluoric ___
• Double-bonded compound
• Rust, chemically
• It's dropped for kicks
• Mineral salt found in arid soil