EPA Method 531.1 Individual Analytes Back Catalog number: 31241 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10009 Internal Std., 4000µg/ml Methylene Chloride, 1ml Price on request 681402 Bifonazole, 50mg Price on request 677223 2-Methoxy-1-propanol, 20mg Price on request