EPA Method 552.1 - Surrogate Standard Back Catalog number: 31056 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C15875000 Para Red, certified, 0.1g Price on request 674638 D6-cis-1,2,3,6-Tetrahydrophthalimide, 10mg Price on request 674587 4-(Methylsulfonyl)-2-nitrobenzoic acid, 100mg Price on request