Perchlorate Level 4 Back Catalog number: 59342 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10207.11-K-ME n-Butyl 4-hydroxybenzoate, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 94-26-8 Price on request 95927 Haloacetic Acids Standard Price on request 2062.6-K-IP 2-Chlorophenol, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. 95-57-8 Price on request