Researchers at Kyushu University have found that PFBS—a replacement per- and polyfluoroalkyl substance (PFAS) often considered safer than older chemical compounds—still causes significant health harms to developing zebrafish embryos. The findings were published in the Journal of Hazardous Materials Advances.
Evaluating a Supposedly Safer Substitute
Traditional PFAS chemicals have faced strict regulations and phase-outs due to their persistence in the environment and toxicity. In response, industries introduced alternative compounds like PFBS (perfluorobutanesulfonic acid) under the assumption that they presented lower risks to biological health.
To test this safety assumption, the Kyushu University research team exposed zebrafish embryos to PFBS. The study observed how the replacement chemical impacted embryonic development, revealing that the substitute compound is far from harmless and continues to pose developmental risks.
The study adds to growing scientific scrutiny regarding alternative PFAS formulations, suggesting that short-chain substitutes may share many of the toxicological concerns associated with the broader chemical family they are meant to replace.
