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ACUTE TOXICITY TO AQUATIC INVERTABRATES (DAPHNIA MAGNA)
TEST SUBSTANCE___________________________________________
Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-600. (1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8heptadecafluoro-, potassium salt, CAS # 2795-39-3)
Remarks: The 3M production lot number was not noted. The test sample is FC-600 (2-15-77 RAW). Current information indicates it is a mixture of 1.0% PFOS, 81.20% water, 12.00% diethylene glycol butyl ether, 1.00% sodium octyl sulfate, 2.00% propane Sultone foamer, 1.00% sodium decyl sulfate, 0.85% xanthan gum, 0.1% N-(3-chloroallyl) hexaminium chloride, 0.80% starch, and 0.05 %-benzotriazole.
The following summary applies to a mixture with incompletely characterized concentration of impurities. Data may not accurately reflect the toxicity of the fluorochemical component of the test sample.
This study is the first of 3 daphnia studies conducted to determine the toxicity of FC-600 after being treated through a SCAS reactor. There is no synthetic sewage medium present.
METHOD:___________________________________________________
Method: Not noted. Type: Static acute GLP: No Year completed: 1977 Species: Daphnia magna Supplier: Not noted. Analytical monitoring: Dissolved oxygen Exposure period: 48-hours Test organism age: Not noted. Statistical method: EC5o calculated by graphing data and by probit analysis. Test conditions:
Dilution water: Carbon-filtered well water, aerated. Dilution water chemistry:
Dissolved oxygen: 9.4 mg/L Lighting: Not noted. Stock and test solution preparation: Volume/volume direct addition to test vessels. Exposure vessels: Not noted. Number of replicates: two Number of daphnids per replicate: 10
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Number of concentrations: six plus a blank control Water chemistry during the study:
Dissolved oxygen (final): 7.5 mg/L (control exposure) 7.0 mg/L (3,200 mg/L exposure)
RESULTS____________________________________________________
Nominal concentrations: Blank control, 180, 320, 560, 1,000, 1,800, and 3,200 mg/L
Element values: 48-hour EC50 = 2,800 (1,700 - 8,100) mg/L
Element values based on nominal concentrations
Remarks: Testing was conducted on the mixture as described in the Test Substance Remarks field. The value reported applies to that mixture and not the fluorochemical proportion alone.
CONCLUSIONS_______________________________________________
The FC-600 48-hour EC50was determined to be 2,800 mg/L with a 95% confidence Interval of 1,700 to 8,100 mg/L.
Submitter: 3M Company, Environmental Laboratory, P.O. Box 33331, St. Paul, Minnesota, 55133
DATA QUALITY_______________________________________________
Reliability: Klimisch ranking = 3. This study lacks description of the methodology used and reporting of test condictions. The sample purity was not properly characterized and the study lacks analytical confirmation of the amount of fluorochemical proportion in the solution.
REFERENCES________________________________________________
This study was conducted by 3M Company, Environmental Laboratory, St. Paul, MN, 1977. OTHER______________________________________________________
Last changed: 6/28/00
002004
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ENVIRONMENTAL ENGINEERING LABORATORY AQUATIC TOXICITY WORK SHEET
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