EPA Method 551.1 Surrogate Standard Back Catalog number: 31102 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8395.6-10MG Galactosan, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 644-76-8 Price on request 684228 N-Nitrosodiisopropylamine, 100 µg/ml, Methanol, Price on request 675232 Dimethachlor, 100 µg/ml, Acetonitrile, 5ml Price on request