Methyl orange as a screening reagent for organic bases.
D000661:Amphetamine / Q000652:urine*; D002725:Chloroform; D006863:Hydrogen-Ion Concentration; D008722:Methods; D004364:Pharmaceutical Preparations / Q000652:urine; D012995:Solubility
D004364:Pharmaceutical Preparations; D002725:Chloroform; D000661:Amphetamine