EPA Method 551.1 Surrogate Standard Back Catalog number: 31102 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10582.12-K-ME N,N-Dimethyltryptamine Price on request S497052 b-Sitosterol-d7 (mix of diasteromers), 10mg Price on request 10854.14-100MG Lignocaine hydrochloride Price on request