EPA Method 515 Herbicide Acids Back Catalog number: 93924 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 55116 CWA Perchlorate Price on request 1450.15-K-IO 4-n-Nonylphenol, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 104-40-5 Price on request 3684.18-K-IO 3-n-Tetradecylthiophene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 110851-66-6 Price on request