Asked by Ke'Andre Dixon
what does sulfur smell like
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GPT-5 mini
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People often say “sulfur smells like…” but it depends — the pure element (yellow sulfur, S8) is essentially odorless. The strong smells people associate with “sulfur” actually come from sulfur-containing compounds:
- Hydrogen sulfide (H2S): rotten-egg smell — the most commonly reported “sulfur” odor.
- Thiols/mercaptans (R–SH): very strong, skunky or rotten-cabbage/garlic-like odors; mercaptans are added to natural gas as an odorant.
- Sulfur dioxide (SO2): sharp, choking, pungent or like burnt matches; produced when sulfur burns.
- Other organosulfur compounds (e.g., disulfides): can smell garlicky, oniony, musty, or earthy.
Safety note: H2S and SO2 are hazardous at high concentrations. If you smell a persistent rotten-egg or chemical sulfur smell at home or near gas lines, ventilate and report it to your gas company or emergency services rather than trying to investigate yourself.
- Hydrogen sulfide (H2S): rotten-egg smell — the most commonly reported “sulfur” odor.
- Thiols/mercaptans (R–SH): very strong, skunky or rotten-cabbage/garlic-like odors; mercaptans are added to natural gas as an odorant.
- Sulfur dioxide (SO2): sharp, choking, pungent or like burnt matches; produced when sulfur burns.
- Other organosulfur compounds (e.g., disulfides): can smell garlicky, oniony, musty, or earthy.
Safety note: H2S and SO2 are hazardous at high concentrations. If you smell a persistent rotten-egg or chemical sulfur smell at home or near gas lines, ventilate and report it to your gas company or emergency services rather than trying to investigate yourself.
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