This chiral reagent, also known as (S)-1-Amino-1,2,3,4-tetrahydrophthalene, presents as a colorless to reddish yellow liquid. It is known to be soluble in water. Keep container tightly closed and store in a cool and dark place. This substance is air sensitive and should be stored under inert gas. (S)-(+)-1,2,3,4-Tetrahydro-1-naphthylamine is incompatible with oxidizing agents and causes skin irritation along with serious eye irritation.