ECH Standard Back Catalog number: 92141 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1899.17-25MG Norcodeine hydrochloride, neat, Solvent-neat, Unit 25mg, # of units-1, Cas.no. 14648-14-7 Price on request 11722.12-100-IO 2,3,3',4,5'-Pentachlorobiphenyl ,100 µg/mL,isooctane,1mL, Price on request 94753 3,3’-Dichlorobenzidine Price on request