EPA Method 502.2 Internal Standard Back Catalog number: 91703 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79710 Bentazon, 1000µg/ml in Acetonitrile, 1ml Price on request BCZ-36 3,6-Dibromo-9H-carbazole, 1.2ml x 50ug/ml, nonane Price on request 11919.13-100MG Ambroxol hydrochloride,neat,neat,100mg, Price on request