Related Clues:

• Soapmaking ingredient
• Caustic alkali
• Caustic matter
• Alkali in cleansers
• KOH, to a layperson
• Drain-opening stuff
• Oven cleaner component
• Chemical base
• Soapmaking caustic
• Lye, e.g.
• Caustic cleansing agent
• Chemical in Drano
• Caustic soapmaking compound
• Chemical used to make biodiesel
• Drano ingredient