Benserazide hydrochloride is soluble in water and should be dissolved in oxygen-free boiled water containing 0.1% sodium metabisulfite or other antioxidants. The solutions decompose on exposure to light and air. Benserazide HCl is a tan, photosensitive solid and should be stored tightly sealed at -4°C, protected from exposure to light. It is not recommended to store the aqueous solution for more than one day.
Additionally, the product is subject to oxidation, and it is advisable to make solutions fresh daily. The product should be stored, as supplied, at room temperature for up to 1 year, and it should be protected from light.
