QC Standard 4 Back Catalog number: 52087 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2126.12-K-IOX5 Arochlor 1242 , 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-5, Cas.no. 53469-21-9 Price on request 70185 4-Fluoroaniline Price on request 673877 Chloridazon-desphenyl, 10.0 µg/ml, Acetonitrile, Price on request