Ingredient
2-Bromo-2-Nitropropane-1,3-Diol
2-Bromo-2-Nitropropane-1,3-Diol is flagged for pregnancy. The concern behind the strongest flag is common allergen and irritant.
- Bronopol
- BNPD
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
- 1 of 6
- Counting avoid, high risk and medium risk
- Irritancy
- 2 of 5
- Higher means more likely to sting or redden
2-Bromo-2-Nitropropane-1,3-Diol and pregnancy
Caution Advised
- Common allergen
- Irritant
- Absorbed into the body
Bronopol is a preservative that prevents microbial contamination in cosmetic products. While it serves an important function in product safety, it releases formaldehyde as it degrades, which raises concerns for certain populations including pregnant women. The primary concern during pregnancy is the formaldehyde release. While topical exposure to low concentrations is considered less problematic than inhalation or oral exposure, formaldehyde is classified as a known irritant and sensitizer. The SCCS notes that formaldehyde can cause allergic reactions and skin sensitization. During pregnancy, when skin may already be more sensitive, the irritation potential increases. Most dermatologists suggest that pregnant women can use products with Bronopol in small amounts, particularly in rinse-off products, but many recommend choosing formaldehyde-free alternatives when possible. The EU restricts its concentration to 0.1% in leave-on products, which limits exposure, but some healthcare providers advise more conservative approaches during pregnancy.
2-Bromo-2-Nitropropane-1,3-Diol and breastfeeding
Safe to Use
- Common allergen
- Irritant
Bronopol functions as a preservative in cosmetic formulations and releases small amounts of formaldehyde over time. When used topically in regulated concentrations, it has minimal systemic absorption. For breastfeeding mothers, the primary concern is local skin irritation rather than transfer to breast milk. The topical application of products containing Bronopol at cosmetic concentrations is not expected to result in significant systemic levels that would affect breastfed infants. However, formaldehyde release can cause skin sensitization in the mother. Dermatologists generally consider properly formulated products with Bronopol acceptable during breastfeeding, particularly when used on areas away from the breast. If using on or near the chest area, washing before breastfeeding is advisable as a precautionary measure.
2-Bromo-2-Nitropropane-1,3-Diol and postpartum
Safe to Use
- Common allergen
- Irritant
During the postpartum period without breastfeeding, Bronopol presents mainly concerns related to skin irritation and potential sensitization. Postpartum skin can be more reactive due to hormonal changes, which may increase sensitivity to preservatives. The formaldehyde release from Bronopol can cause contact dermatitis in susceptible individuals. If you have sensitive skin or a history of formaldehyde sensitivity, choosing alternative preservative systems may be preferable during this potentially sensitive recovery period.
2-Bromo-2-Nitropropane-1,3-Diol and trying to conceive
Safe to Use
- Common allergen
Bronopol used in cosmetic concentrations has no known effects on fertility or reproductive function. The topical application in regulated amounts does not result in systemic exposure sufficient to affect hormonal balance or conception. While some women prefer to minimize exposure to formaldehyde-releasing preservatives during the preconception period, there is no scientific evidence that cosmetic use of Bronopol at regulated concentrations impacts fertility. Those with skin sensitivities may choose alternatives for comfort, but there are no fertility-based contraindications.
2-Bromo-2-Nitropropane-1,3-Diol and PCOS
Safe to Use
Bronopol is a preservative with no hormonal activity and no known interactions with PCOS-related metabolic or hormonal pathways. It does not affect androgen levels, insulin sensitivity, or other factors associated with PCOS management. The main consideration for PCOS users is that some individuals with PCOS have more reactive skin due to hormonal influences. The irritation potential of Bronopol may be more apparent in those with sensitive or inflamed skin, though this is an individual response rather than a PCOS-specific concern. There are no contraindications for use with PCOS. Those managing acne-prone skin may benefit from the antimicrobial properties of preserved products, though alternative preservatives without formaldehyde release may be preferable for very sensitive skin.
2-Bromo-2-Nitropropane-1,3-Diol and general use
Safe to Use
- Common allergen
- Irritant
Bronopol is an effective antimicrobial preservative that protects cosmetic products from bacterial and fungal contamination. Its preservative function is important for product safety, particularly in water-containing formulations that are susceptible to microbial growth. The main concerns with Bronopol are related to formaldehyde release, which can cause allergic contact dermatitis and skin sensitization in susceptible individuals. The SCCS has evaluated this ingredient and established concentration limits to minimize these risks. At regulated concentrations (0.1% in leave-on products), most people tolerate it well. The EU Cosmetics Regulation restricts its use and requires specific labeling when formaldehyde release may occur. Individuals with known formaldehyde sensitivity or reactive skin may experience irritation and should choose products with alternative preservatives. For most users, it remains a safe and effective preservative option.
Everything else flagged for the same profiles
Related ingredients
Ingredients suggested in place of 2-Bromo-2-Nitropropane-1,3-Diol, 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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