Inhaling common disinfectant chemicals known as quaternary ammonium compounds (QACs) is profoundly more toxic than oral ingestion, causing severe lung injury at exposure levels frequently found in humans.
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https://www.sflorg.com/2026/03/env03302601.html
Common Disinfectant Chemicals Far More Toxic When Inhaled

Breathing in common disinfectant chemicals known as quaternary ammonium compounds, or QACs, may be far more harmful than swallowing them