F-53B (6:2 chlorinated polyfluorinated ether sulfonate)
CAS: 73606-19-6 | Type: organic_pollutant
High Risk (Adults)
Safety Summary
Hazard ProfileChinese PFAS alternative to PFOS used in chrome plating since the 1970s. Structurally similar to PFOS but with ether linkage and chlorine. Detected in Chinese drinking water, river water, and human blood. Bioaccumulation factor comparable to or exceeding PFOS. Emerging global contaminant — detected outside China via consumer product imports.
Risk (Adults)High
Risk (Children)Very High
Risk (Dogs)Moderate High
Risk (Cats)Moderate High
Regulatory Status
SummaryNo major regulatory flags
Molecular FormulaC8ClF16KO4S
Molecular Weight570.67
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