Bitterant

A bitterant (or bittering agent) is a chemical that is added to a product to make it smell or taste bitter. Bitterants are commonly used as aversive agents to discourage the inhalation or ingestion of toxic substances.

Examples of use

  • The addition of a bitterant to ethanol denatures the product.
  • Bitterants are used in antifreeze to prevent pet and child poisonings. It is required by law in some places (France, Oregon, etc.)
  • Gas dusters often use a bitterant to discourage inhalant abuse, although this can cause problems for legitimate users. The bitterant not only leaves a bitter flavor in the air, but also leaves a bitter residue on objects, like screens and keyboards, that may transfer to hands and cause problems (such as when eating).
  • Examples of bitterants

  • Denatonium is used in a variety of applications as an aversive agent.
  • Sucrose octaacetate
  • Quercetin
  • Brucine
  • Quassin
  • Bitterness scales

    The threshold for stimulation of bitter taste by quinine averages a concentration of 8 μM (8 micromolar). The taste thresholds of other bitter substances are rated relative to quinine, which is thus given a reference index of 1. For example, Brucine has an index of 11, is thus perceived as intensely more bitter than quinine, and is detected at a much lower solution threshold. The most bitter substance known is the synthetic chemical denatonium, which has an index of 1,000. It is used as an aversive agent (a bitterant) that is added to toxic substances to prevent accidental ingestion. This was discovered in 1958 during research on lignocaine, a local anesthetic, by MacFarlan Smith of Gorgie, Edinburgh, Scotland.

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    Latest News for: bitterant

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    The Daily Mail 23 Jan 2025
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    How to survive snow and bitter cold that's reached all the way to the Gulf Coast

    The Galveston Daily News 22 Jan 2025
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    Bitter cold to hit Valley one more day

    The Daily Item 22 Jan 2025
    The cold snap that has enveloped Pennsylvania in recent days is expected to break by Thursday, but not before another round of school delays and warming shelters across the region ....
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    How long with the bitter cold last?

    CBS News 22 Jan 2025
    CBS meteorologist Lonnie Quinn has the latest forecast on how long freezing temperatures from the polar vortex will last ... .
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    Winter storm brings bitter cold, crippling snow to Southeast

    The Washington Post 22 Jan 2025
    Snow and ice had ground road travel to a halt in some places and at least two people died in Texas. Many school districts had closed throughout a region unaccustomed to snow ... .
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    D.C.-area forecast: Bitter cold continues through tomorrow morning, then gradually warmer

    The Washington Post 22 Jan 2025
    It’s every bit as cold today as the past two days, maybe even slightly colder ... .
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    CWG Live updates: Bitter cold continues through tomorrow morning, then gradually warmer

    The Washington Post 22 Jan 2025
    It’s every bit as cold today as the last two days, maybe even slightly colder ... .
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    Bitter Cold Expected to Push Record Power Demand

    Memphis Flyer 22 Jan 2025
    Memphis Light, Gas & Water is asking customers to reduce power Wednesday morning ....
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    Ice disks form along Missouri River as bitter cold hits Kansas City. What are they?

    Kansas City Star 22 Jan 2025
    The strangely shaped ice slabs spotted along the river aren’t a new weather pattern. They’ve have been spotted on oceans, lakes and rivers around the world ... .
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    Bitter cold sets a new record for Kansas City. Now there’s snow in the forecast

    Kansas City Star 22 Jan 2025
    Anyone heading outside Tuesday should bundle up due to dangerous wind chill values, the National Weather Service said ... .
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    Lehigh Valley weather: Bitter cold continues, still days before temps crack freezing mark

    Lehigh Valley 22 Jan 2025
    Hypothermia and frostbite remain a concern Wednesday for the Lehigh Valley, with arctic high pressure continuing to build over the region, the National Weather Service says ....
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    Making sense of Biden’s bitterness

    Norfolk Daily News 22 Jan 2025
    Praise the Lord for his mercy. Joe Biden’s failed presidency has finally come to an end. There was no predicting what Biden would do at the last minute to sabotage Donald Trump ... .
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    The Wall Street Journal: Biden offers bitter last word

    Ouachita Citizen 22 Jan 2025
    Joe Biden’s leave-taking as President hasn’t been a study in political grace. His farewell address on Wednesday was a regrettable case in point that underscores why he has disappointed so many Americans ... .

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