title: Determination of instability constants and stoichiometric balances of some amine-methyl orange coupled compounds.
mesh_terms: D000588:Amines / Q000032:analysis; D003061:Codeine; D004396:Coloring Agents / Q000032:analysis*; D004339:Drug Compounding; D004355:Drug Stability; D004809:Ephedrine; D010830:Physostigmine; D013053:Spectrophotometry / Q000379:methods
chemical_list: D000588:Amines; D004396:Coloring Agents; D010830:Physostigmine; D004809:Ephedrine; D003061:Codeine