EPA Method 624 Internal / Surrogate Standard Back Catalog number: 92559 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676281 Cyromazine, 100 µg/ml, Methanol, 1ml Price on request M260302 Methimazole-d3, 1mg Price on request 71029 Tritolyl phosphate (Tech) Price on request