EPA Method 508.1 & 525.2 Pesticide Standard Back Catalog number: 91970 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677572 Hexabromobenzene, 250mg Price on request 677290 Sulfisozole sodium, 100mg Price on request MHCH-MXA Mass-Labelled HCH Solution/Mixture, 2µg/ml in Nonane, 1,2ml Price on request