Internal Standard Back Catalog number: 96651 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 680884 Metribuzin-desamino-desmethyl, 10mg Price on request DF-2378-S 2,3,7,8-Tetrachlorodibenzofuran , 1.2ml x 50ug/ml, nonane Price on request 2025.6-5ML Pentachlorobenzene, neat, Solvent-neat, Unit 5mL, # of units-1, Cas.no. 608-93-5 Price on request