Document OzLOkpX2DpgXrVJpGy9bGRdVQ

BACK TO MAIN MICROBIAL RESPIRATION INHIBITION TEST TEST SUBSTANCE________________ Identity: Decafluoro(pentafluoroethyl)cyclohexanesulfonate, DEA salt; may be referred to as CS-2070. When dissolved in water may also be referred to or as CS-2151 or FC-90. (DEA salt of perfluoro(ethylcyclohexyl) sulfonate, [C2F5-CF(CF2CF2)2CFSO3-][H2N(CH2CH2OH)2+]) Remarks: The 3M production lot number was not noted. The test sample is CS-2151, a mixture of CS-2070 in water (approximately 25% test substance and 75% water). All values reported relate to this mixture. No calculations were made to adjust for the actual concentration of the test substance in the test sample. The sample purity was not characterized. METHOD Method: 3M Environmental Laboratory Protocol for Determining Acute Toxicity of a Compound to Activated Sludge Mixed Liquor Test type: Acute GLP: No Year Completed: 1981 Analytical monitoring: Dissolved oxygen. Statistical methods: Results were determined by graphic interpolation of the change in dissolved oxygen as a function of time. Test organism source: Activated sludge from an aeration basin at the Metro Wastewater Treatment Plant, St Paul, MN. Test condition: Dilution water: Not noted. Inoculation: Not noted. Reference and test solution preparation: Not noted. Test vessels: Not noted. Number of concentrations: 1 plus blank. Temperature: Not noted. Total suspended solids and pH on day of testing: Not noted. Element Basis: Change in dissolved oxygen compared to the blank. RESULTS Nominal concentrations: Blank control, and test substance at 1000 mg/L. Element value: the control. No acute inhibitory effect at 1000 mg/L compared to Element value based on nominal concentrations. Remarks: Testing was conducted on the test substance as described in the test substance remarks field. The values reported are based on nominal concentrations of CS-2151. CONCLUSIONS____________________________________________ No affect on the respiration rate of microorganisms at 1000 mg/L. This indicates an absence of an acute toxic effect at this concentration. Submitter: 3M Company, Environmental Laboratory, P.O. Box 33331, St. Paul, Minnesota, 55133 DATA QUALITY____________________________________________ Reliability: Klimisch ranking = 3. A non-standard method used. There is a lack of characterization of the test sample. The inoculum was not properly characterized. Test solutions were not analyzed for test substance concentrations and confirmation of the amount of fluorochemical components in the solution. REFERENCES______________________________________________ This study was conducted by the 3M Company, Environmental Laboratory, St. Paul, MN, Lab Request number 6260S, 1981. OTHER Last changed: 4/01/01