EPA Method 525.2 - 526 Internal Standard Back Catalog number: 91297 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 34181 Propionitrile Price on request 674010 Monuron, 100 µg/ml, Acetonitrile, 5ml Price on request 10359.21-100-ME Haloperidol-d4 (4-chlorophenyl-d4) Price on request