Related Clues:

• Calcium hydroxide, for one
• Freshness
• Litmus tester
• Mineral salt found in arid soil
• Its pH is more than 7
• Certain soluble salts
• Describes some soils and sloughs
• It's basic
• Soluble salts
• Chemical base
• Lye, e.g.
• Basic material
• It turns litmus paper blue
• Blue litmus indicator
• High-pH hydroxide