Surrogate Standard Back Catalog number: 98607 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10889.2-10MG Ethyl sulfate sodium salt,neat,neat,10mg, Price on request 92258 Semi-Volatile Internal Standard Price on request 10625.12-50-T 2,3,7,8-Tetrachlorodibenzo-p-dioxin Price on request