title: [Crystal morphological and habit investigations of crystalline drugs. II. Amobarbital, barbital and ephedrine hydrochloride].
abstract: Crystal morphology, habit and refractive indices necessary for the analyses of amobarbital, barbital, phase III and ephedrine hydrochloride were studied using a polarizing microscope and partly using a reflexing goniometer. These substances, market products of Japanese Pharmacopoeia XII, were measured for optical properties including key refractive indices to confirm their modifications, and their possible facial angles along the zone of which axis is parallel to the elongated direction was also measured using a goniometer. Stereographic projections were drawn and the crystal habits of market products were shown by orthographic projections. It was also found that one of the key refractive indices of each modification was specially usable for the analyses of crystal habits including their crushed powders.
authors: Kenbikogaku-kenkyusho, Ltd., Ashiya-shi, Japan.
authors: A
authors: A
authors: Watanabe
authors: N
authors: N
authors: Ohnuma
mesh_terms: D000654:Amobarbital / Q000737:chemistry; D001462:Barbital / Q000737:chemistry; D003460:Crystallization; D004809:Ephedrine / Q000737:chemistry; D008859:Microscopy, Polarization
chemical_list: D001462:Barbital; D004809:Ephedrine; D000654:Amobarbital