Erbium (Er) Back Catalog number: 58068 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 94714 Semi-Volatile Standard Price on request C14102000 Heptachlor-endo-epoxide (trans-, isomer A), certified, 10mg Price on request 19600-5ML Butylbenzene,anal. std., 5ml Price on request