Internal & Surrogate Standard Back Catalog number: 97790 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 680444 gamma-HCH, 100 µg/ml, Methanol, 1ml Price on request 54140 Total Iron (Fe(II) and Fe(III)) Price on request 2786.14-100-AN 3,3'-Dimethylbenzidine,100 µg/mL,acetonitrile,1mL, Price on request