Biomaterial Database

[Crystal morphological and habit investigations of crystalline drugs. II. Amobarbital, barbital and ephedrine hydrochloride]. 1993

A Watanabe, and N Ohnuma

Kenbikogaku-kenkyusho, Ltd., Ashiya-shi, Japan.

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.

UI	MeSH Term	Description	Entries
D008859	Microscopy, Polarization	Microscopy using polarized light in which phenomena due to the preferential orientation of optical properties with respect to the vibration plane of the polarized light are made visible and correlated parameters are made measurable.	Microscopy, Polarized Light,Polarization Microscopy,Light Microscopies, Polarized,Light Microscopy, Polarized,Microscopies, Polarization,Microscopies, Polarized Light,Polarization Microscopies,Polarized Light Microscopies,Polarized Light Microscopy
D003460	Crystallization	The formation of crystalline substances from solutions or melts. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)	Crystalline Polymorphs,Polymorphism, Crystallization,Crystal Growth,Polymorphic Crystals,Crystal, Polymorphic,Crystalline Polymorph,Crystallization Polymorphism,Crystallization Polymorphisms,Crystals, Polymorphic,Growth, Crystal,Polymorph, Crystalline,Polymorphic Crystal,Polymorphisms, Crystallization,Polymorphs, Crystalline
D004809	Ephedrine	A phenethylamine found in EPHEDRA SINICA. PSEUDOEPHEDRINE is an isomer. It is an alpha- and beta-adrenergic agonist that may also enhance release of norepinephrine. It has been used for asthma, heart failure, rhinitis, and urinary incontinence, and for its central nervous system stimulatory effects in the treatment of narcolepsy and depression. It has become less extensively used with the advent of more selective agonists.	Ephedrine Hydrochloride,Ephedrine Renaudin,Ephedrine Sulfate,Erythro Isomer of Ephedrine,Sal-Phedrine,Ephedrine Erythro Isomer,Hydrochloride, Ephedrine,Renaudin, Ephedrine,Sal Phedrine,SalPhedrine,Sulfate, Ephedrine
D000654	Amobarbital	A barbiturate with hypnotic and sedative properties (but not antianxiety). Adverse effects are mainly a consequence of dose-related CNS depression and the risk of dependence with continued use is high. (From Martindale, The Extra Pharmacopoeia, 30th ed, p565)	Amylobarbitone,Pentymal,Amobarbital Sodium,Amsal,Amylbarb sodium,Amylobeta,Amytal,Amytal Sodium,Barbamyl,Eunoctal,Isoamitil Sedante,Isonal,Neur-Amyl,Novamobarb,Placidel,Sodium Amobarbital,Sodium Amytal,Transital,Amobarbital, Sodium,Sodium, Amobarbital
D001462	Barbital	A long-acting barbiturate that depresses most metabolic processes at high doses. It is used as a hypnotic and sedative and may induce dependence. Barbital is also used in veterinary practice for central nervous system depression.	Barbitone,Diethylmalonylurea,Ethylbarbital,Diemal,Dormileno,Medinal,Veronal