EPA Method 552,552.1,552.2 Internal Std Back Catalog number: 30105 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 71789 Fluazifop-p-butyl Price on request N-12514-1G n-Butyl alcohol, 1g Price on request 83540 Benzaldehyde-DNPH Price on request