Proquinazid, 100 µg/ml, Acetonitrile, 5ml Back Catalog number: 675248 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 50633 Ammonia as (NH4+) Price on request X9087 a,a-Dimethylphenethylamine Price on request 21013 EPA Method 8260 Internal Standard - Revised Price on request