Fonofos Back Catalog number: 70697 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10187.21-50-AN RCS-4 N-(5-Hydroxypentyl) metabolite, 50µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 1379604-66-6 Price on request 31005 EPA Method 502/524 Fortification Solution Price on request 96559 Doxepin Price on request