Turbidity Standard (400 NTU) Back Catalog number: 54122 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended DD-1378-S 1,3,7,8-Tetrachlorodibenzo-p-dioxin, 1.2ml x 50ug/ml, nonane Price on request 681400 Cyclanilide, 100mg Price on request 79050 Heptachlor epoxide Price on request