EPA Method 515.2 - Analytes Back Catalog number: 30076 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11907.20-100MG Fluorescein disodium salt dihydrate, 90%,neat,neat,100mg, Price on request 98529 4,4’-Diamino-3,3’-dimethyldiphenylmethane Price on request 8760.16-10MG 1-n-Propyl-2-phenylbenzimidazole,neat,neat,10mg, Price on request