Aminolevulinic acid, also known as ALA, is a topically administered metabolic precursor of protoporphyrin IX. After topical administration, aminolevulinic acid (ALA) is converted to protoporphyrin IX (PpIX) which is a photosensitizer. When the proper wavelength of light activates protoporphyrin IX, singlet oxygen is produced, resulting in a local cytotoxic effect. In 1999, FDA approved this drug for for actinic keratosis.
Properties:
Appearance & Physical State: white to pale yellow crystals or
Melting Point: ~150 °C (dec.)
Flash Point: 155-157°C
Storage Condition: 2-8°C