CLP Semi-Volatile Base/Neutral Surrogate Std Back Catalog number: 23016 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 50786 Lanthanoids Mix Price on request 70393 Hexachlorophene Price on request 81403 Chlorpyrifos, 1000µg/ml in Hexane 1ml Price on request