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Docosyltrimethylammonium Chloride, also known as BTAC-228, is a yellow waxlike organic compound with the chemical formula CH3(CH2)21N(Cl)(CH3)3, used as an antistatic agent and, sometimes, a disinfectant. It is commonly found in cosmetics such as conditioners, hair dye, and mousse, as well as in detergents. Laboratory tests have indicated that it does not readily biodegrade.

Behentrimonium chloride, also known as behenyl trimethyl ammonium chloride or docosyltrimethylammonium chloride, is a quaternary ammonium compound. It is derived from canola seeds from the brassica rapa oleifera plant (canola or rapeseed plant), a part of the mustard plant family. This yellow, waxy substance has excellent moisturizing and anti-static properties. It can also be used as a preservative and emulsifying agent and combines easily with other ingredients.

Behentrimonium Chloride is used as an antistatic agent and, sometimes, a disinfectant. It is commonly found in cosmetics such as conditioners, hair dye, and mousse, and also in detergents.

Scientific studies have shown that docosyltrimethylammonium chloride (Behentrimonium chloride) can be used safely by most people at the recommended concentration of 5% in rinse-off products and 3% in leave-in conditioning treatments. Above these levels, it can harm the health of your skin, scalp and hair follicles.
If you are sensitive or allergic to Behentrimonium chloride, it can cause the following potential side effects:
Allergic reactions, including redness, itching, and swelling
Respiratory problems, including wheezing, coughing, and shortness of breath
Eye problems, including redness, swelling, and pain