Copper - 20 PPM Back Catalog number: 50594 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 19096 EPA Method 602 - Purgeable Aromatics Price on request 66153 2,2’,4,4’,5,5’-Hexachlorobiphenyl (153) Price on request 95990 Oxygenates in Gasoline Price on request