Spiking Standard 1 Back Catalog number: 53064 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673951 Parathion-methyl, 100mg Price on request 8938.7-1G 4-Oxopimelic acid, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 502-50-1 Price on request 1581.2-250MG Dicyanodiamide (Cyanoguanidine), neat, Solvent-neat, Unit 250mg, # of units-1, Cas.no. 461-58-5 Price on request