Spiking Standard 1 Back Catalog number: 53069 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C-189N 2,3,3',4,4',5,5'-Heptachlorobiphenyl, 5mg Price on request 2676.8-100MG Tetrabromophthalic anhydride Price on request 98858 Formaldehyde-DNPH Level 1 (0.1ug/mL) Price on request