Verification II Standard 2 Back Catalog number: 52020 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C17774500 2,4,5-Trichlorophenol, certified, 0.1g Price on request 54122 Turbidity Standard (400 NTU) Price on request 673152 Thiram, 250mg Price on request