EPA Method 552 Internal Standard Back Catalog number: 30055 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 12487.8-K-ME Dibutyltin-d18 dichloride, 1000µg/ml in MeOH, 1ml Price on request 676664 Tolyltriazole, 100mg Price on request 676622 cis-3-(2,2-Dichlorovinyl)-2,2-dimethylcyclopropane Price on request