Internal & Surrogate Standard Back Catalog number: 97790 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 674799 PSA-GCB-Mix 16 Price on request 79379 Benzo(a)pyrene Price on request EC-4060 13C LABELED PCB MIXTURE PCBS-77/101/141/178 10UG/ML IN NONANE Price on request