CLP Semi-Volatile Base/Neutral Surrogate Std Back Catalog number: 23016 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 92257 Semi-Volatile Surrogate Standard Price on request 679447 Heptachlor, 100 µg/ml, Methanol, 1ml Price on request 56124 Chromium (Cr) Price on request