Internal Standards Mix 33, 2000 ng/µl, 1ml Back Catalog number: YA08273300TO Availability: In the manufacturer's stock Price on request - + Recommended 675323 Zoxamide, 10.0 µg/ml, Acetonitrile, 10ml Price on request 11888.9-K-AN Benzocaine,1000 µg/mL,acetonitrile,1mL, Price on request 70188 1-Fluoronaphthalene Price on request