T 2387 (OTTO) Tris hydrochloride, GR 99%+ Cas 1185-53-1 - used to increase permeability of cell membranes. T 2387 (OTTO) Tris hydrochloride, GR 99%+ Cas 1185-53-1 - used for crystallization of proteins at various pH values. T 2387 (OTTO) Tris hydrochloride, GR 99%+ Cas 1185-53-1 - used in coelomic fluid and in cortland medium to store unfertilized rainbow trout eggs.