This chemical substance, also known as (-)-PSEUDOEPHEDRINE, presents as a white crystalline solid. It is slightly soluble in water. Store in a tightly closed container in a dry and well-ventilated place. This substance is stable under recommended storage conditions. (1R,2R)-(-)-PSEUDOEPHEDRINE, 98% is light sensitive and incompatible with strong oxidizing agents. harmful if swallowed, in contact with skin or if inhaled, this chemical also causes skin irritation, serious eye irritation, and may cause respiratory irritation.