title: Dye salt formation as a general method for colorimetric determination of antihistaminics. Part 2: Spectrophotometric determination of thenalidine maleate and thiazinamium methylsulphate in pure and dosage forms.
mesh_terms: D000814:Aniline Compounds / Q000032:analysis; D003124:Colorimetry / Q000379:methods*; D004396:Coloring Agents; D004304:Dosage Forms; D006634:Histamine H1 Antagonists / Q000032:analysis*; D008298:Maleates / Q000032:analysis; D010880:Piperidines / Q000032:analysis*; D011398:Promethazine / Q000031:analogs & derivatives* / Q000032:analysis; D012492:Salts; D013053:Spectrophotometry; D013876:Thiophenes / Q000032:analysis
chemical_list: D000814:Aniline Compounds; D004396:Coloring Agents; D004304:Dosage Forms; D006634:Histamine H1 Antagonists; D008298:Maleates; D010880:Piperidines; D012492:Salts; D013876:Thiophenes; D011398:Promethazine