CLP Semi-Volatile Base/Neutral Surrogate Std Back Catalog number: 22016 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 680635 Chlorthion, 25mg Price on request 91970 EPA Method 508.1 & 525.2 Pesticide Standard Price on request CA17923840 Vitamin A palmitate, 150mg Price on request