Ingredient
Quaternium-15
Quaternium-15 is flagged for pregnancy, trying to conceive and general use. The concern behind the strongest flag is irritant and absorbed into the body.
- Dowicil 200
- N-(3-chloroallyl)hexaminium chloride
Verdict by profile
Truva checks every ingredient against six profiles. Jump to any of them for the full assessment.
- Strongest verdict
- Caution Advised
- Its verdict for pregnancy, the profile this one is worst in
- Profiles flagged
- 3 of 6
- Counting avoid, high risk and medium risk
- Irritancy
- 3 of 5
- Higher means more likely to sting or redden
Quaternium-15 and pregnancy
Caution Advised
- Irritant
- Absorbed into the body
Quaternium-15 is a preservative that releases formaldehyde, a chemical compound used to prevent microbial contamination in cosmetic products. While effective as a preservative, it's also a known sensitizer that can cause skin irritation and allergic reactions. The primary concern during pregnancy relates to formaldehyde exposure. While the amounts released from quaternium-15 in cosmetics are generally low, formaldehyde is classified as a human carcinogen by the IARC and the EPA. Studies on occupational formaldehyde exposure during pregnancy have shown mixed results, with some research suggesting potential reproductive effects at high exposure levels. However, topical cosmetic exposure is significantly lower than occupational inhalation exposure. ACOG doesn't specifically prohibit formaldehyde-releasing preservatives, but many dermatologists recommend avoiding them during pregnancy as a precautionary measure, especially for individuals with sensitive skin or a history of formaldehyde sensitivity. While not absolutely prohibited, many healthcare providers suggest choosing alternative preservatives during pregnancy when possible. If you're pregnant and have products containing quaternium-15, consider whether you have viable alternatives with safer preservative systems. Women with no history of sensitivity and occasional use may face minimal risk, but regular exposure may be best avoided.
Quaternium-15 and breastfeeding
Safe to Use
- Irritant
Quaternium-15 is used as a preservative in cosmetics and releases small amounts of formaldehyde. When applied topically, systemic absorption is minimal, and the compound works primarily on the skin surface. While breastfeeding, topical use of products with quaternium-15 poses minimal risk to breastfed infants. The low systemic absorption of topically applied formaldehyde-releasing preservatives means transfer to breast milk is extremely unlikely. However, if applying products near the breast area, it's advisable to wash the area before breastfeeding to prevent any direct contact between the product and the infant's skin. Dermatologists generally don't restrict formaldehyde-releasing preservatives during breastfeeding, though some recommend avoiding them in products applied directly to the chest. If you have concerns about this preservative or experience skin irritation, products with alternative preservative systems are widely available and may be preferable.
Quaternium-15 and postpartum
Safe to Use
- Irritant
- Common allergen
Quaternium-15 functions as an antimicrobial preservative in cosmetics. While effective at preventing product contamination, it's a known contact allergen that may cause irritation or allergic reactions in sensitive individuals. For postpartum women not breastfeeding, the main concern is potential skin sensitization rather than reproductive effects. Postpartum skin can be more sensitive due to hormonal changes, making reactions to allergens like quaternium-15 more likely. If you haven't used products with this ingredient before or have sensitive skin, patch testing is advisable.
Quaternium-15 and trying to conceive
Caution Advised
- Absorbed into the body
Quaternium-15 is a formaldehyde-releasing preservative used in cosmetics. While topical exposure is low-level compared to occupational or environmental exposure, some women prefer to minimize formaldehyde exposure during the preconception period. The concern relates to formaldehyde, which has been studied for reproductive effects at high occupational exposure levels. However, the amount released from cosmetic preservatives is significantly lower. Most fertility specialists don't specifically restrict this ingredient, but given the precautionary approach many take while trying to conceive, some women choose to switch to products with alternative preservatives. If you're actively trying to conceive and want to minimize any theoretical exposures, products without formaldehyde-releasing preservatives are widely available.
Quaternium-15 and PCOS
Safe to Use
- Irritant
Quaternium-15 is a preservative that prevents bacterial and fungal growth in cosmetic products. It has no hormonal activity or impact on androgen levels, making it hormonally neutral for PCOS management. The primary concern for women with PCOS is potential skin irritation rather than hormonal interference. Since PCOS-affected skin can be sensitive and inflammation-prone, the irritant potential of this preservative may be problematic for some individuals. However, it doesn't affect hormone balance or insulin sensitivity. This ingredient is safe from a hormonal perspective for women with PCOS. If you have sensitive or acne-prone skin common with PCOS, and notice irritation from products, check if quaternium-15 is present and consider alternatives. The preservative itself won't interfere with PCOS treatment or management.
Quaternium-15 and general use
Caution Advised
- Common allergen
- Irritant
- Releases formaldehyde
Quaternium-15 is a widely used antimicrobial preservative that releases formaldehyde to prevent bacterial and fungal contamination in cosmetic products. It's particularly effective in water-based formulations where microbial growth is a concern. The main health concern is that quaternium-15 is one of the most common causes of cosmetic-related allergic contact dermatitis. The American Contact Dermatitis Society named it Contact Allergen of the Year due to its high sensitization rate. Additionally, it releases formaldehyde, which is classified as a carcinogen by the IARC. While the levels released in cosmetics are low and topical exposure differs from inhalation exposure, some dermatologists recommend avoiding formaldehyde-releasing preservatives, especially for individuals with sensitive skin, eczema, or known formaldehyde allergy. The EU restricts quaternium-15 to 0.2% maximum concentration, while the FDA permits its use without specific concentration limits but requires labeling. Many cosmetic brands are reformulating to exclude formaldehyde-releasing preservatives due to consumer concerns and allergy potential. If you've experienced unexplained skin reactions to cosmetics, quaternium-15 allergy should be considered, and patch testing by a dermatologist can confirm sensitivity.
Everything else flagged for the same profiles
Related ingredients
Ingredients suggested in place of Quaternium-15, each one with its own page here.
Ingredients that raise the same concerns.
Where this came from
Truva summarises published guidance from bodies including ACOG, the FDA, the EU SCCS and the Cosmetic Ingredient Review. It has no access to your medical history and it is not a substitute for your doctor, dermatologist or midwife. These assessments have not been reviewed by a clinician, and nothing here is a diagnosis or a prescription. If you are pregnant, breastfeeding or being treated for PCOS, take the ingredient list to the person looking after you.
Assessment last pulled from the ingredient database on .
One ingredient is the easy case.
A label has thirty of them. Truva reads the whole list at once and answers for the profile you set: pregnancy, breastfeeding, postpartum, trying to conceive, PCOS, or general use.
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