WS Trace Elements #1 Back Catalog number: 55012 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1144.24-10MG n-Tetracosane, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 646-31-1 Price on request 9705.10-1G 1,2-Dihydroxynaphthalene, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 574-00-5 Price on request 673594 Fenthion, 100 µg/ml, Ethyl acetate, 5ml Price on request