CLP Semi-Volatile Base/Neutral Surrogate Std Back Catalog number: 23016 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3754.20-K-AC 4-tert-Octylphenol triethoxylate,1000 µg/mL,acetone,1mL, Price on request 676639 D4-Ethephon-hydroxy, 100 µg/ml, Acetone, 1ml Price on request 91703 EPA Method 502.2 Internal Standard Price on request