ISTD/Surrogate Standard Back Catalog number: 92572 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11191.22-100-ME Sildenafil-d8 (piperazine-d8),100 µg/mL,MeOH,1mL Price on request 93904 Aliphatic Hydrocarbon Calibration #2 Price on request 79035 Indeno(1,2,3-cd)pyrene, 1000µg/ml in Acetonitrile, Price on request