Benzidine Back Catalog number: 43124 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70348 Crotonaldehyde Price on request 31057 EPA Method 552.1 - Surrogate Standard Price on request 8639.45 Beauvericin, , Solvent-, Unit , # of units-, Cas.no. 26048-05-5 Price on request