Laboratory Fortification Standard Back Catalog number: 59172 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 81400 EPA Method 8140/8141 Analytes Price on request 64688 Chlorpyrifos, 100µg/mL in MeOH, 1ml Price on request 11146.24-K-IO Tris(2,6-dimethylphenyl) phosphate,1000 µg/mL,isooctane,1mL, Price on request