9,11β-Dichloro-17,21-dihydroxy-16β-methyl-pregna-1,4-diene-3,20-dione Dipropionate is a corticoid with the potential for antiinflammatory activity. Impurity of Beclomethasone (B131000), a glucocorticoid. Used in chronic asthma and allergic rhinitis. Antiallergic, antiasthmatic (inhalant). Anti-inflammatory (topical).