EPA Method 551.1 Internal Standard Back Catalog number: 30103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2254.10-K-IO 4-Methyl-8-nitroquinoline, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 2801-29-8 Price on request MET-12478C-25MG Metolachlor ESA sodium salt, 25mg Price on request 11798.20-10MG 9-Carboxynonyl-7-carboxyheptyldimethyl-d6 ammonium bromide,neat,neat,10mg, Price on request