EPA Method 524 & 624 - Internal Standard Back Catalog number: 19794 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675356 Sulfameter, 250mg Price on request 684841 MCPA, 10.0 µg/ml, Acetonitrile, 10ml Price on request 675605 Flubenzimine, 100 µg/ml, Ethyl acetate, 5ml Price on request