EPA Method 500 Series Internal Std #4 Back Catalog number: 30003 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9812.2-K-ME 2-Nitroaminoethanol, 1000µg/mL, Solvent-methanol, Unit 1.1mL, # of units-1, Cas.no. 74386-82-6 Price on request 677100 Imidacloprid urea, 10.0 µg/ml, Acetonitrile, 10m Price on request 672969 Polymyxin B sulfate, 100mg Price on request