CLP Semi-Volatile Base/Neutral Surrogate Std Back Catalog number: 21016 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677996 Fenthion-sulfone, 100 µg/ml, Toluene, 1ml Price on request 2773.5-100-AN Atrazine-desisopropyl, 100µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 1007-28-9 Price on request 673133 2,4-D, 250mg Price on request