Related Clues:

• Gunpowder ingredient
• Salt of element #53
• NaI, e.g., chemically
• Fertilizer ingredient
• Compound in fireworks
• Explosive stuff
• Soap ingredient
• Pharmaceutical ointment
• Soapmaking compound
• Saltpeter
• Compound used in fertilizers
• Fertilizer compound
• Fertilizer component
• Yellow salt
• Halogen salt