EPA Method 525.2Mix #1 Back Catalog number: 92207 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended A481504 L-Alanine-13C3, 25mg Price on request 12119.7-100MG Hydrochlorothiazide,neat,neat,100mg, Price on request 81403 Chlorpyrifos, 1000µg/ml in Hexane 1ml Price on request