Method 4 Standard 1 Back Catalog number: 93233 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 94729 3,3’-Dimethylbenzidine Price on request 11158.18-250MG L-Nicotine bitartrate dihydrate,neat,neat,250mg, Price on request 71409 Methyl dibromochloroacetate Price on request