Document VJLoRqRoQVj18DrZYKvjw8zej

BACK TO MAIN PHOTODEGRADATION (AQUEOUS DIRECT) TEST SUBSTANCE________________ Identity: N-methylperfluorooctane sulfonamidoethanol; may also be referred to as N-MeFOSE Alcohol, FC-790, or FM-3925. (1-Octanesulfonamide, N-methyl-1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-N-(2hydroxyethyl)-, CAS # 24448-09-7) Remarks: Material is an off-white, waxy solid. Sample was taken from 3M lot number 505. Purity information was not recorded. METHOD Method/guideline followed: Specific method not noted. Procedure used a modified Crosby and Tang photoreactor. Equipment: Two studies - Single-chamber Crosby and Tang photoreactor -Triple-chamber varient of Crosby and Tang photoreactor Type (test type): Simulated sunlight GLP (Y/N): No Year: 1980 Light Source: F-40BL fluorescent light Light Spectrum (nm): Not noted. Spectrum of substance (max lambda, max epsilon and epsilon 295): Not determined. Remarks field: - Test medium (air, water, soil, other - specify): deionized water - Duration: 30 days - Positive Controls: None - Negative Controls: One - Blank Controls: Two (one methanol and one ethyl acetate) RESULTS_____________________________________________________ Concentration of Substance: A saturated solution created by stirring an excess of sample in water for 6 hours, filtering the resulting solution, and using the clear filtrate. Temperature C: Single chamber unit: 35oC Triple chamber unit: 21+3C Degradation %: 0% after 30 days when analyzed by electron capture gas chromatography. Flame ionization detection showed two possible photolysis products later identified by GC/MS as acetic acid, n-propyl acetate and / or ethanol. Repeat of the experiment produced similar results. However, GC/MS BACK TO MAIN identified two other possible photolysis products; a fluorocarbon amine and Nmethylperfluorohexanesulfo namide. Remarks field: Carbon filters on the photolysis units showed insignificant amounts of FM-3925 were volatilized during the experiment. CONCLUSIONS_________________________________________________ Little to no photodegradation was detected in this study using simulated sunlight, indicating the test substance does not undergo photolysis at a significant rate. Submitter: 3M Company, Environmental Laboratory, P.O. Box 33331, St. Paul, Minnesota, 55133 DATA QUALITY___________________________________________________ Reliability: Klimisch ranking 3. Sample purity was not properly characterized. The concentration of FM-3925 in the standard compared to the FM-3925 control suggests some other mode of removal / degradation may be occurring. It is not clear how the control samples were handled. The concentration of FM-3925 in solution is well above the solubility limit of the test substance, indicated to be 0.82 mg/L. There was no direct measurement of the FM-3925 concentration. The concentration technique could potentially volatilize FM-3925. It's unlikely that all degradation products could be seen using GC/MS. REFERENCES___________________________________________________ 3M Technical Report "Photolysis of RM3925 in Aqueous Solutions." James Gagnon and C. H. Schrandt, Project 9770012600, Report Number 045, Lab Request number 4649S, November 7, 1980 OTHER______________________________________________________ Last changed: 4/01/01