Perchlorate (ClO4-) Back Catalog number: 59345 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3623.20-K-ME 17alpha-Ethynylestradiol,1000 µg/mL,MeOH,1mL, Price on request DF-IS-J100 Mass-Labelled PCDD Internal Standard Solution, 1.2ml, nonane Price on request 91179 Pesticide Standard Price on request