Document kDBndX85q462opo362G7mqrgy

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, 1822% 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: LC50 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