B 2280 (OTTO) 2-Butoxyethoxy ethanol, 99%+ Cas 112-34-5 - used in cosmetics. B 2280 (OTTO) 2-Butoxyethoxy ethanol, 99%+ Cas 112-34-5 - used as diluents and leveling agents in the manufacture of paints and in baking. It is also used in the manufacture of nitrocellulose.