S 4659 (OTTO) Sodium cacodylate trihydrate, ≥98% Cas 6131-99-3 - used in the stabilization of the fixatives for electron microscopy. S 4659 (OTTO) Sodium cacodylate trihydrate, ≥98% Cas 6131-99-3 - used to collect vibratome sections to perform nucleoside-diphosphatase technique.