EPA Method 8121 Internal Standard Back Catalog number: 81203 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9400.19-100-ME Doxepin hydrochloride, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 1229-29-4 Price on request 10748.18-100-W Iotalamic acid meglumine salt Price on request X9108 Famphur Price on request