Skin discoloration

• Boiled lobster appearance - boric acid
• Bleaching white - phenol
• Brown black - sulfuric acid, iodine, silver nitrate
• Deep brown - bromine
• Ash gray - Mercuric chloride, physostigmine
• Blue - silver salts
• Yellow - picric acid, nitric acid
• Pale bonds on fingernails - arsenic
• Bluish gray - silver salts