525 Internal Standard Back Catalog number: 96263 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677989 Pirimiphos-methyl, 100 µg/ml, Toluene, 1ml Price on request 2025.6-K-IO Pentachlorobenzene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 608-93-5 Price on request 79291 4,4’-DDE Price on request