Erbium (Er) Back Catalog number: 57068 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 687344 13C6-Diclofenac sodium, 10mg Price on request XA10230000AL Amitraz, 100µg/mL in Acetonitrile, 1ml Price on request 19042 EPA Method 508 Surrogate Standard Price on request