EPA Method 552.1 - Surrogate Standard Back Catalog number: 31057 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 40021 EPA Method 624Mix #1 - Purgeables Price on request 8472.12-250MG Triclosan, techn.,neat,neat,250mg, Price on request 94533 Pesticide Standard Price on request