Turbidity Standard (100 NTU) Back Catalog number: 50385 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0012.22-200-T Napht[1,2-a]anthracene, 200µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 195-06-2 Price on request 70491 1,2,3,4-Tetramethylbenzene Price on request 91516 Aroclor 1248 Price on request