Description_x000D_ Biochem/physiol Actions_x000D_ H1 histamine receptor antagonist; CNS depressant; anticholinergic._x000D_ Features and Benefits_x000D_ This compound is also offered as part of Sigma′s Library of Pharmacologically Active Compounds (LOPAC®1280), a biologically annotated collection of high-quality, ready-to-screen compounds. Click here to learn more._x000D_ This compound was developed by Wyeth. To browse the list of other pharma-developed compounds and Approved Drugs/Drug Candidates, click here._x000D_ Other Notes_x000D_ Solubility: Freely soluble in water, in hot dehydrated alcohol and in Chloroform. Practically insoluble in ether, in acetone and in ethyl acetate._x000D_ Physical form_x000D_ Appearance: White or faint yellow, odorless, Crystalline powder, slowly oxidizes and acquires a blue color, on prolonged exposure to air._x000D_ Legal Information_x000D_ LOPAC is a registered trademark of Sigma-Aldrich Co. LLC