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a pfos derivative that was often used in cleaning agents, floor polishes and auto polishes is potassium n-ethyl-n-[(heptadecafluorooctyl)sulfonyl] glycinate (cas no. 2991-51-7).
'potassium n-ethyl-n-[(heptadecafluorooctyl)sulfonyl] glycinate` (رقمه في سجل دائرة المستخلصات الكيميائية 2991-51-7).