EPA Method 528 Internal Standard Back Catalog number: 93188 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 678125 Bifenthrin, 100 µg/ml, Acetonitrile, 5ml Price on request L20645000CY Benzo(e)pyrene, 10µg/ml in Cyclohexane, 10ml Price on request 11478.18-100MG Triphenylphosphine oxide,neat,neat,100mg, Price on request