Turbidity Standard (1.0 NTU) Back Catalog number: 59290 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1127.17-100-T 3-Nitrobenzanthrone, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 17117-34-9 Price on request 73213 Benzenesulfonamide Price on request 676515 2-Chlorobenzamide, 100mg Price on request