EPA Method 8141/1657 Surrogate Standard Back Catalog number: 92357 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676679 o-Dianisidine, 100mg Price on request 674924 Imazosulfuron, 100mg Price on request 678153 Thionazin, 100 µg/ml, Acetonitrile, 1ml Price on request