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 P4MHPS Perfluoro-4-methylheptane sulfonate, 200ul x 1.00ug/ml, methanol Price on request 71427 2-Methoxyethyl acetate Price on request 56719 Potassium (K) Price on request