EPA Method 548.1 Internal Standard Back Catalog number: 30078 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 90839 N,N-Dimethylformamide Price on request 79477 Dimethylamine Price on request 678269 Halofuginone hydrobromide, 100 µg/ml, Acetonitril Price on request