EPA Method 551.1 Surrogate Standard Back Catalog number: 30102 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 12564.8-100-ME Dopamine-d4 hydrochloride, 100µg/ml in MeOH, 1ml Price on request 674650 D5-3-Chloro-1,2-propanediol, 25mg Price on request 71554 Sucrose Price on request