T 2216 (OTTO) Trimethylammonium chloride, 98% Cas 593-81-7 - used in electrodeposition of aluminum wires. T 2216 (OTTO) Trimethylammonium chloride, 98% Cas 593-81-7 - used in the synthesis of trimethylamine gallane, trimethylamine-borane[4] and azido-bridged perovskite-type metal-organic frameworks (MOFs).