GFAA Initial Calibration Verification Back Catalog number: 52315 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11686.12-100-IO 2,2',3,6-Tetrachlorobiphenyl,100 µg/mL,isooctane,1mL, Price on request 95180 Nitroguanidine Price on request 682260 Pentabromotoluene, 50mg Price on request