EPA Method 8141/1657 Surrogate Standard Back Catalog number: 92357 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 93619 Urea & Caprolactam Price on request 59516 Hexavalent Chromium (Cr 6+) Price on request 677655 Flufenpyr-ethyl, 10mg Price on request