624B Internal / Surrogate Standard Back Catalog number: 98628 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 672902 Isofenphos-methyl, 50mg Price on request 677430 Tris-(2-butoxyethyl)phosphate, 250mg Price on request 684945 Phorate-oxon, 100µg/ml in Acetonitrile, 1ml Price on request