EPA Method 531.1 Individual Analytes Back Catalog number: 30041 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 674467 Halfenprox, 10.0 µg/ml, Acetonitrile, 10ml Price on request 8779.14-K-IO Di-n-propyl phthalate, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 131-16-8 Price on request 70634 Tributyltin chloride Price on request