EPA Method 502.2 Surrogate Standard Back Catalog number: 91704 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676466 Niflumic acid, 100mg Price on request 679884 4,4'-Diamino-3,3'-dimethyldiphenylmethane, 100 µg/ Price on request 73514 Simazine hydroxy Price on request