EPA Method 8330 - Calibration Mix #1 Back Catalog number: 83525 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 98529 4,4’-Diamino-3,3’-dimethyldiphenylmethane Price on request 680327 Isofetamid, 10mg Price on request 677620 Chlorthiamid, 10.0 µg/ml, Ethyl acetate, 10ml Price on request