Method 200.8/1638/1640 Internal Standard Back Catalog number: 53145 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8596.34 5 alpha(H),14ß(H),17ß(H),20R-3ß-Benzyloxycholestane, , Solvent-, Unit , # of units-, Cas.no. Price on request 71293 Benzo(c)cinnoline Price on request 2234.17-5MG Aflatoxin B2, neat, Solvent-neat, Unit 5mg, # of units-1, Cas.no. 7220-81-7 Price on request