You can purchase luminol as a raw powder or in ready-to-use field kits from several specialized forensic and scientific suppliers: Luminol - Amazon.com
Luminol is primarily used in to detect trace amounts of blood at crime scenes. It reacts with the iron in hemoglobin to produce a distinctive blue-green chemiluminescent glow, visible in darkened rooms even if the blood has been cleaned or is years old. Where to Buy Luminol