EPA Method 508 Surrogate Standard Back Catalog number: 19042 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70957 Demeton [O & S Isomers] Price on request 674869 N,N-Dimethylhydrazine, 250mg Price on request 10356.19-K-ME Clomipramine-d6 hydrochloride Price on request