Cations Mix Back Catalog number: 59503 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended B519483 Bisphenol E-d12, 1mg Price on request 1240.7-K-ME n-Heptane, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 142-82-5 Price on request 2786.14-100-IO 3,3'-Dimethylbenzidine, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 119-93-7 Price on request