Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Gas Chromatography (GC) (5) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (1) Sample Type Blood (1) Serum or Plasma (3) (-) Urine (1) Test Area Drugs of Abuse (6) (-) Exposure (1) Impairment (1) Therapeutics (11) Test Category Industrial/Environmental Toxins (1) Test Sub-Category Other (1) Test Test Name 1549U Dichlorobenzidine, Urine