EPA Method 508 Surrogate Standard Back Catalog number: 19042 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 682842 Allylbenzene, 1000mg Price on request 98863 Formaldehyde-DNPH Level 6 (10ug/mL) Price on request 72294 1,2,4-Benzenetricarboxylic acid Price on request