Surrogate Standard Back Catalog number: 91625 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677477 Triphenylmethane, 250mg Price on request PN-27S 1,2,3,4-Tetrachloronaphthalene, 1.2ml x 50ug/ml, nonane Price on request 15900-4090-100AN5 Prometryn, 100μg/ml in Acetonitrile, 5ml Price on request