Which scientific product recall in the 1990s led to fundamental changes in laboratory equipment safety standards after causing numerous lab fires and explosions?

Product recalls in the scientific sector can have significant implications for research, healthcare, and consumer safety. Major recalls often lead to industry-wide changes in quality control, manufacturing protocols, and regulatory oversight. This poll tests your knowledge about one of the most consequential scientific product recalls that transformed laboratory safety standards and practices worldwide.

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Fisher Scientific's defective Bunsen burners
Sigma-Aldrich's contaminated chemical reagents
Certain models of Cole-Parmer hot plates/stirrers with faulty thermostats
Thermo Scientific's malfunctioning centrifuge rotors