This unnatural amino acid derivative, also known as 3-Amino-L-alanine hydrochloride, presents as a white to slightly pale yellow crystalline powder. Keep container tightly closed. Store in a cool and dark place, under inert gas. Protect from incompatible materials and moisture, as this substance is hygroscopic. (S)-(+)-2,3-Diaminopropanoic Acid Hydrochloride is incompatible with oxidizing agents. This chemical causes skin irritation as well as serious eye irritation.