"Dioxin-Like" PCBs Calibration Kit , 7 x 500ul, nonane Back Catalog number: WP-CVS Manufacturer: Wellington Laboratories Availability: 1 week Price on request - + Recommended 59887 Calcium (Ca) Price on request X9189 2,4,5-TP acid (Silvex) Price on request 20005 CLP Semi-Volatile Acid Surrogate Standard Price on request