EPA Method 525.2 - 526 Internal Standard Back Catalog number: 91297 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 91182 Propylene glycol Price on request 673736 Azaconazole, 10.0 µg/ml, Ethyl acetate, 10ml Price on request 674968 D10-Ethoxyquin HCl, 10mg Price on request