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 (8) Anesthetics (6) Antianxiety (3) Antiarrhythmics (3) Anticholinergics (7) Antidepressants (9) Antiepileptics/Antiseizures (2) Antineoplastics (1) Antipsychotics (1) Antithrombotics (3) Benzodiazepines (3) Biomarkers (2) Depressants (6) Diuretics (2) Drugs of Abuse (2) Muscle Relaxants (4) NPS/Designer Drugs (6) Plasticizers (2) Sedative/Hypnotics (12) Stimulants (3) (-) Volatiles (1) Test Sub-Category Other (1) Test Test Name 0556U Benzidine, Urine