QC Standard 4 Back Catalog number: 52087 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 12013.20-K-IO Bis(4-methyl-1-pentyl) phthalate,1000 µg/mL,isooctane,1mL, Price on request 675977 Primisulfuron-methyl, 100 µg/ml, Acetonitrile, 5 Price on request 681917 Prallethrin, 10.0 µg/ml, Acetonitrile, 10ml Price on request