PCB Mix 25 ppb Back Catalog number: 98626 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9424.8-K-ME Valproic acid, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 99-66-1 Price on request 94834 CLP Semi-Volatile Calibration Mix #2 Price on request 11696.12-100-IO 2,3,4,5-Tetrachlorobiphenyl ,100 µg/mL,isooctane,1mL, Price on request