Turbidity Standard (400 NTU) Back Catalog number: 54122 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 92435 Semi-Volatile Mix Price on request 71938 Stearic acid butyl ester Price on request MPCB-MXH Native Chlorinated Methoxybiphenyl Solution/Mixture, 1.2ml, nonane Price on request