EPA Method 531.1 Individual Analytes Back Catalog number: 31241 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended L15020000CY Methidathion, 10µg/mL in Cyclohexane, 10ml Price on request 3475.10-10MG 5,8-Dihydro-1,4-naphthoquinone, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 6295-28-9 Price on request 83544 Crotonaldehyde-DNPH Price on request