EPA Method 508.1 & 525.2 Pesticide Standard Back Catalog number: 91970 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 672983 Estriol, 100mg Price on request DTEP Triethyl phosphate-d15, 1.2ml x 50ug/ml, toluene Price on request 679472 Triamiphos, 10.0 µg/ml, Cyclohexane, 10ml Price on request