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 Analgesics (4) Anesthetics (3) Antianxiety (2) Antiarrhythmics (2) Anticholinergics (4) Antidepressants (4) Antiepileptics/Antiseizures (1) Antineoplastics (1) Antipsychotics (1) Antithrombotics (2) Benzodiazepines (2) Depressants (2) Diuretics (1) Muscle Relaxants (2) NPS/Designer Drugs (4) Plasticizers (2) Sedative/Hypnotics (6) Stimulants (2) (-) Volatiles (1) Test Sub-Category Other (1) Test Test Name 0556U Benzidine, Urine