CWA Silica as SiO2 Back Catalog number: 55100 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3877.4-1G Furan, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 110-00-9 Price on request 678382 4,4'-DDT, 100 µg/ml, Acetonitrile, 5ml Price on request 0035.18-50-T Cyclopenta[cd]pyrene, 50µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 27208-37-3 Price on request