Atosiban Acetate Description A competitive oxytocin and vasopressin antagonist by exhibiting high affinity for both receptors. It is used to treat preterm labors. Specifications Cas No. 90779-69-4 Product ID A7657 Product Name Atosiban Acetate Formula Wt. 994.2 Store Temp +4oC References Williams et. al. Adv Exp Med Biol. 449:473-479 (1998). Bossmar T. J Perinant Med. 26:458-45 (1998).