Document 3QwbVGXed9Oa5a5MXq5bRmvkD

BACK TO MAIN ACUTE TOXICITY TO FISH (FATHEAD MINNOW) TEST SUBSTANCE_____________________ Identity: Potassium Decafluoro(pentafluoroethyl)cyclohexanesulfonate may also be referred to as FC-98. (CAS # 67584-42-3) Remarks: The 3M production lot number was not noted. The test sample is FC-98. Its purity was not sufficiently characterized, though current information indicates it is a mixture of 66-70% test substance, 18 22% potassium decafluoro(trifluoromethyl)cyclohexanesulfonate, 9-13% potassium nonafluorodi(trifluoromethyl)cyclohexanesulfonate, 1-3% potassium perfluorocyclohexanesulfonate, and a trace of residual organic fluorochemicals. METHOD:_______________________________________________________ Method: Not noted Type: Acute static GLP: No Year completed: 1975 Species: Pimephales promelas Supplier: Not noted. Analytical monitoring: Temperature, pH, and dissolved oxygen. Exposure period: 96-hours Statistical methods: LC5o values calculated using graphic interpolation. Test fish age: Juveniles Length and weight: Average length = 2 in. Average weight = 1.5 g (wet) Loading: Not noted. Pretreatment: None Test conditions: Dilution water: Carbon-filtered St. Paul City water. Initial dilution water chemistry: Not noted Lighting: Not noted. Stock and test solution preparation: Not noted. Concentrations dosing rate: Once. Stability of the test chemical solutions: Not noted. Exposure vessels: Not noted Number of replicates: none. Number of fish per vessel: Not noted. Number of concentrations: five plus a blank control Water chemistry during the study: pH range (24-96 hours): 7.0 - 7.0 (control exposure) BACK TO MAIN 7.0 - 7.2 (300 mg/L exposure)* Dissolved oxygen range (24-96 hours): 5.0 - 5.9 mg/L (control exposure) 3.9 - 4.5 mg/L (300 mg/L exposure)* * 300 mg/L (second highest concentration) exposure values used because the highest concentration used resulted in total mortality at 72 hours. Temperature range (0-96 hours): 70 - 72 F RESULTS____________________________________________________ Nominal concentrations: Blank control, 40, 100, 200, 300, and 400 mg/L Element values: 96-hour LC50 = 200 mg/L Element values based on nominal concentrations CONCLUSIONS_____________________________________________ The test sample 96-hour LC50 for fathead minnow was determined to be 200 mg/L. Submitter: 3M Company, Environmental Laboratory, P.O. Box 33331, St. Paul, Minnesota, 55133 DATA QUALITY________________________________________________ Reliability: Klimisch ranking = 3. Study lacks description and records of the method followed. There is a lack of characterization of the test sample purity and the study lacks analytical confirmation of the amount of fluorochemical proportion in the test solutions. Study not conducted in duplicate. REFERENCES___________________________________________________ This study was conducted by the 3M Company, Environmental Laboratory, St. Paul, MN, 1975. OTHER_______________________________________________ Last changed: 3/31/01