Document 93gRYJaw25kdaqKqbwdq96ORL
AR R26 - 07/0
BIODEGRADATION (BOD/COD)
EST SUBSTANCE
Identity: A mixture containing perfluorooctanesulfonate, which may also be
referred to as PFOS, FC-95, or as a component of FC-203. (1Octanesulfonic acid) (CAS # 2795-39-3).
Remarks: The 3M production lot numbers were not noted. The test sample is FC-203. Current information indicates it is a mixture of 1.34%
PFOS, 35% diethylene glycol butyl ether, 37.85% water, 20% ethylene glycol,
2.66 % Sultone foamer, 3% sodium octyl sulfate, 0.1% sodium lauryl sulfate, and 0.05% tolyltriazole.
The following is an abbreviated summary ofmultiple biodegradation
studies on FC-203. These studies apply to a mixture with incompletely
characterized concentrationsof impurities. Data does not accurately reflect the degradation potential of the fluorochemical component of the
test sample.
METHOD:
Method: Various methods, most not noted.
Type: BOD and Dichromate Reflux COD
GLP: No Year completed: 1973 - 1980
Contact time: 20 days
Inoculum: Seed from various sources.
RESULTS
Chemical Oxygen Demand (COD) range:
420,00--0 1,070,000 mg/kg
Biochemical Oxygen Demand (BOD) range:
5-Day:
206,250 -- 560,000 mg/kg
-
10-Day:
450,000 - 646,875 mg/kg
12-Day:
15-Day:
660,000 -- 830,000 mg/kg
426,312 -- 604,687 mg/kg
18-Day:
20-Day:
660,000 mg/kg
426,562 - 1,100,000 mg/kg
Remarks: Testing was conducted on the mixture as described in the Test
Substance Remarks field. The values reported apply to that mixture and not ~ the fluorochemical proportion alone.
conclusions
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DATA QUALITY
Rmeeltiahboidliftoyl:loKwleid.misTchherainnkoicnuglu=m3i.s nSottudpyrolpaecrklsydcehsacrraicptteiroinzeadn.dTrheecotredsstoifngthe was conducted on a mixture with chemicals having varying degrees of sbiaomdpeglreadpaubriiltiytwy,aslenaodtinpgrotpoeproltyencthiaarlacmtiesriintzeerdparentdattihoen sotfutdhyelraecskusltasn.alTythiecal confirmationofthe amount of fluorochemical proportion in the solution.
REFERENCES
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