Interference Standard 4 Back Catalog number: 52041 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72901 tert-Dodecylmercaptan, mixture of isomers Price on request 673649 Paraoxon-methyl, 10.0 µg/ml, Ethyl acetate, 10ml Price on request 676107 Fenitrothion, 250mg Price on request