Skip to content

Preservative

BENZALKONIUM BROMIDE

CAS 91080-29-4
35

Safety score · 0–100

Caution

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

A quaternary ammonium preservative used in small amounts to prevent microbial contamination of cosmetics. EU rules restrict it due to irritation potential, allowing only low levels in rinse-off products.

Skin benefits

  • Effective broad-spectrum antimicrobial preservative
  • Prevents bacterial and fungal contamination in products
  • Stable across a wide pH range

Known concerns

  • Quaternary ammonium known skin and eye irritant
  • Common contact allergen and sensitizer
  • EU restricts use to rinse-off products at low concentrations
  • Can disrupt skin barrier and mucous membranes

References

EU

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

Related preservatives

35
BENZETHONIUM CHLORIDE
Preservative
 35
BROMOCHLOROPHENE
Preservative
 35
Benzalkonium chloride, bromide and saccharinate (10)
Preservative
 35
Benzalkonium chloride, bromide and saccharinate (9)
Preservative
 35
Butyl 4-hydroxy­benzoate and its salts Propyl 4-hydroxy­benzoate and its salts
Preservative
 35
PEG-5 DEDM HYDANTOIN OLEATE
Preservative
 35
POTASSIUM PARABEN
Preservative
 35
PROPYLPARABEN
Preservative

Check your shelf

Find BENZALKONIUM BROMIDE in your products.

Scan any cosmetic product with LuxSense to see if it contains BENZALKONIUM BROMIDE and get a full ingredient breakdown with safety scores.

This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.