Soya lecithin powder, 97%OTTOKEMI Code: S 2501 Synonyms: Soya lecithin powder S 2501 (OTTO) Soya lecithin, powder, 97% Cas 8002-43-5 - used in pharmaceutical products as dispersing, emulsifying, and stabilizing agents, and are included in intramuscular and intravenous injections, parenteral nutrition formulations, and topical products such as creams and ointments.