EPA Method 500 Series Internal Std #4 Back Catalog number: 32003 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended X23145700CY Chloroparaffin C14-C17 57% Cl, 100µg/mL in CY,10ml Price on request P-1034S Trinexapac-ethyl, 100µg/ml in MeOH, 1ml Price on request 1226.16-10MG Di-n-butyl phthalate, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 84-74-2 Price on request