For kids aged 5 and older this ingredient is generally low risk. It’s a conditioning agent found in conditioners, creams and some wipes and is usually well tolerated by school-age children and teens.
Use products with this ingredient as directed. Prefer rinse-off products (conditioners) over leave-on if you’re worried. Do a quick patch test on a small area of skin the first time you use a new product. Stop use and rinse with water if you see redness, rash, swelling, or if the child complains of stinging. If breathing problems or severe swelling occur, seek medical help right away.
Safety reviews by the Cosmetic Ingredient Review find it acceptable with some limits; that is the main safety reference. Some studies on related quaternary ammonium compounds (for example animal studies titled “Quaternary Ammonium Disinfectants Cause Subfertility in Mice…” and “Exposure to common quaternary ammonium disinfectants decreases fertility in mice”) reported reproductive effects at higher exposures, and a lab study on related disinfectants showed effects on nerve cells (see “Benzalkonium Chloride Disinfectants Induce Apoptosis…”). There are also limited reports of respiratory or allergy reactions with related compounds. Because these findings came from higher doses, normal use in a conditioner or cream is lower risk, but avoid using products with this ingredient on broken skin, avoid sprays or aerosols to reduce breathing exposure, and watch your child for any signs of skin or breathing problems.
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This ingredient has the following documented risks:
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This ingredient may also be listed as:
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This ingredient is found in the following products:
This list shows products that contain Behentrimonium Methosulfate or its alternative names.
Yes, Behentrimonium Methosulfate is generally considered safe for 5+ year old children based on current research.
Could weaken or confuse immune system.
Can make breathing issues like asthma worse in babies and kids.
May harm organs like liver, kidneys, or lungs with repeated use.
Some studies link this to future fertility or reproductive issues.
Behentrimonium Methosulfate is commonly found in skincare products, cosmetics, and topical applications. Always check ingredient labels before use.
The appropriate age depends on the specific ingredient properties and concentration. This analysis is for 5+ year old children. Use the age selector above to check other ages.
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