0-6 month old newborns • Skin contact product
For newborns and babies up to 6 months, this ingredient is best avoided when possible. Studies on similar ingredients show effects in animals and in lab tests that could matter for very young, developing bodies.
Do not use products that list Quaternium-91 on babies under 6 months unless a pediatrician tells you it’s necessary. If exposure happens, rinse the area with plain water, avoid using near the eyes, mouth or diaper area, and watch the baby’s skin for any redness, rash or swelling. Prefer products labelled for newborns that avoid quaternary ammonium compounds.
Watch for skin irritation, redness, rashes or unusual fussiness after contact. The caution comes from animal studies showing reproductive effects ("Quaternary Ammonium Disinfectants Cause Subfertility in Mice..." and "Exposure to common quaternary ammonium disinfectants decreases fertility in mice"), lab studies suggesting effects on developing nerve cells ("Benzalkonium Chloride Disinfectants Induce Apoptosis...") and reports of altered toxicological findings in people ("Altered toxicological endpoints in humans from common quaternary ammonium compound disinfectant exposure"). If you see any worrying signs, stop use and contact your pediatrician.
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This ingredient has the following documented risks:
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This ingredient is found in the following products:
This list shows products that contain Quaternium-91 or its alternative names.
Quaternium-91 is not recommended for 0-6 month old babies due to potential safety risks.
Some studies link this to future fertility or reproductive issues. This is especially important for babies whose skin and systems are still developing.
May harm organs like liver, kidneys, or lungs with repeated use. This is especially important for babies whose skin and systems are still developing.
Quaternium-91 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 0-6 month old babies. Use the age selector above to check other ages.
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