Related Clues:

• Sodium hydroxide
• Eye burner
• Strong alkali
• Drain-cleaning chemical
• NaOH or KOH
• Pipe cleaner
• Strong cleanser
• Tough cleaner
• Soap ingredient
• Sodium or potassium hydroxide
• Pharmaceutical ointment
• Drain cleaner ingredient
• Caustic stuff
• Caustic chemical
• Soap-making compound