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