EPA Method 507 - Performance Check Solution Back Catalog number: 19130 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended XA13920000AL Formothion, 100µg/ml in Acetonitrile Price on request 678596 Clodinafop free acid, 100 µg/ml, Acetonitrile, 1 Price on request 677226 ATII (Traseolid), 20mg Price on request