Bronopol
INCI: 2-Bromo-2-Nitropropane-1,3-Diol
Formaldehyde-releasing preservative with bromine in the structure. Suppresses gram-negative bacteria effectively, but causes irritation and allergy.
Evidence by route
Topical application
DVery weak or conflicting data.
In combination with amines it can form nitrosamines. European brands are moving away from it, though it still appears in countries with looser regulation.
Tolerability and safety
Irritation potential
MediumAllergen risk
HighPregnancy
CautionSkin types
Use with caution
Frequently asked questions
Is Bronopol safe during pregnancy?
Bronopol should be used with caution during pregnancy. Consulting a dermatologist or OB-GYN is advisable.
What skin types is Bronopol for?
Use with caution in: sensitive.
Can Bronopol irritate the skin?
Bronopol has moderate irritation potential. Sensitive skin may show a transient reaction that usually settles with adaptation.
Can Bronopol cause an allergic reaction?
Bronopol has high allergen potential. Perform a patch test on the inner forearm 24 hours before facial application.