CWA Iron Back Catalog number: 55311 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11739.12-100-IO 2,2',3,4,4',6-Hexachlorobiphenyl ,100 µg/mL,isooctane,1mL, Price on request 11118 EPA Method 8270A - Analytes Mix #8 Price on request 677528 4,4'-DDD, 250mg Price on request