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) (3) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (1) Headspace Gas Chromatography (GC) (2) Refractometer (REF) (2) Sample Type Urine (1) Test Area Exposure (1) Test Category Analgesics (1) Anesthetics (2) Antitussives/Cough Suppressants (3) Biomarkers (2) Depressants (1) Plasticizers (2) Sedative/Hypnotics (13) (-) Volatiles (1) Test Sub-Category Other (1) Test Test Name 0556U Benzidine, Urine