EPA Method 525 Spike C Back Catalog number: 92314 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2279.6-K-TX5 Phenol-2,3,4,5,6-d5, 1000µg/mL, Solvent-toluene, Unit 1mL, # of units-5, Cas.no. 4165-62-2 Price on request 18000-2529-100ME5 Guanylurea-HCl, 100µg/ml in MeOH, 5ml Price on request 1627.8-10MG Ethyl-ß-D-6-glucuronide-d5, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. Price on request