Possible Clues:

• Leaching product
• Food-curing chemical
• It does not sound true that this can make one caustic
• Strongly alkaline solution for washing or cleansing
• A strong alkaline solution
• NaOH or KOH
• It's caustic to sound so deceitful
• It does not sound true that this could be so caustic
• Oven-cleaning chemical
• Grease dissolver