EPA Method 525 Spike C Back Catalog number: 92314 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9282.28-100-ME Sildenafil citrate,100 µg base/mL,MeOH,1mL Price on request 8638.7-1ML 2-Methyl-1,3-hexadiene, neat, Solvent-neat, Unit 1mL, # of units-1, Cas.no. Price on request 2430.6-K-IPX5 2,4,6-Tribromophenol-3,5-d2, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-5, Cas.no. 93951-78-1 Price on request