EPA Method 624 Surrogate Standard Back Catalog number: 19112 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675146 Tolfenpyrad, 10.0 µg/ml, Acetonitrile, 10ml Price on request 675555 Cinosulfuron, 100 µg/ml, Acetonitrile, 5ml Price on request 677829 D8-Morpholine, 100mg Price on request