EPA Method 502.2 Surrogate Standard Back Catalog number: 91704 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 678207 Gibberellin A4, 5mg Price on request 12095.4-K-ME 1,4-Dioxane-d8,1000 µg/mL,MeOH,1mL, Price on request 12165.14-10MG Ormetoprim,neat,neat,10mg, Price on request