Benzalkonium Bromide

AKA: Benzododecinium bromide, Sterinol, N-Benzyl-N, N-dimethyldodecan-1-aminium bromide, Bacfor BL, Lauralkonium bromide, Sinnoquat BL 80, Sinnoquat BL 95, Benzenemethanaminium, N-dodecyl-N, N-Dodecyl-N, N-dimethylbenzenemethanaminium bromide, Ammonyl BR 1244
Synthetic
Preservative
Cleanser
Not Clean
Benzalkonium Bromide is the mixture of alkylbenzyldimethylammonium bromides that conforms generally to the formula:
Formula
C21H38BrN
Mol. Weight
384.40
CAS #
91080-29-4
Form
Liquid
Functions
Antimicrobial
Keeps your product from growing bacteria, mold, or yeast. Without these, that jar of cream becomes a petri dish in about a week.
Antistatic
Deodorant
Preservative
Keeps your product from growing bacteria, mold, or yeast. Without these, that jar of cream becomes a petri dish in about a week.
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Fights Bacteria
Traditional Use
A quaternary ammonium salt developed in the 20th century as a synthetic preservative and antimicrobial agent. Created to replace natural antiseptics and provide broad-spectrum preservation in cosmetics and personal care products.
EWG
3
CIR
Insufficient data
Pregnancy
Caution
CIR Safety Findings
all-shades-safe
Concentration Guide
3%
0%4%
Reg. Limit
EU regulatory limit: 3%. Avoid contact with the eyes Source: EU Cosmetics Regulation (EC) 1223/2009, Annex III (Restricted Substances), Entry 65
Regulatory Status
USAunder review
EUpermitted
JAPANpermitted
CANADApermitted
Skin Types
all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
The paper trail
🔬Peer-reviewed1 paper
⚖️Regulatory1 listing
🛡️Safety-assessed0 reviews
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR