Skincare Ingredient
Save ingredients to your skin profile and we'll use them when you look up products — instantly flagging what's reactive, neutral, or works well for your skin.
Benzalkonium Chloride
In Skincare: Is Benzalkonium Chloride Safe? Comedogenic Rating & Side Effects
Safety Information
Overview
Ingredient Profile
Data & Research
Scientific Facts
Common Uses
Formulation in Benzalkonium Chloride
Role of Benzalkonium Chloride
Active Cosmetic Mechanisms
ANTIMICROBIAL
Germ FighterInhibits the growth of bacteria, fungi, and other microorganisms
SCIENTIFIC ANALYSIS
// Evidence: Antimicrobial agents possess bactericidal, bacteriostatic, fungicidal, or fungistatic properties through disrupting cell membrane integrity, inhibiting protein synthesis, interfering with metabolic pathways, or damaging DNA/RNA. Common antimicrobials include quaternary ammonium compounds, alcohols, chlorhexidine, triclosan, and essential oils. Efficacy depends on concentration, pH, contact time, and microbial load.
ANTISTATIC
Static EliminatorReduces static electricity and flyaway hair
SCIENTIFIC ANALYSIS
// Evidence: Antistatic agents neutralize electrostatic charges through cationic surfactants (quaternary ammonium compounds like behentrimonium chloride) or conductive polymers that increase surface conductivity to dissipate charge or attract moisture. The mechanism involves forming a conductive film on fiber surfaces, neutralizing charge buildup. Particularly effective on damaged hair with raised cuticles.
DEODORANT
Odor NeutralizerMasks or neutralizes body odor
SCIENTIFIC ANALYSIS
// Evidence: Deodorants combat body odor through antimicrobial action against odor-causing bacteria (Corynebacterium, Staphylococcus), odor absorption/adsorption, enzymatic inhibition, or masking with fragrance. Active ingredients include antimicrobials, odor absorbers (zinc ricinoleate, cyclodextrins), and fragrances. They prevent bacterial conversion of sweat components into volatile malodorous compounds without reducing sweat volume.
PRESERVATIVE
Product ProtectorPrevents microbial contamination and extends shelf life
SCIENTIFIC ANALYSIS
// Evidence: Preservatives inhibit microbial growth through various mechanisms: disrupting cell membranes (phenoxyethanol, parabens), releasing formaldehyde (DMDM hydantoin), chelating essential nutrients, or creating unfavorable pH. Broad-spectrum preservatives target bacteria, yeast, and mold. Efficacy depends on concentration, pH, formulation type, and microbial challenge. Must pass preservative efficacy testing (PET/challenge testing) meeting USP, EP, or JP standards.
SURFACTANT - DISPERSING
Dispersing SurfactantDistributes particles evenly using surfactant properties
SCIENTIFIC ANALYSIS
// Evidence: Dispersing surfactants keep solid particles or immiscible liquid droplets uniformly distributed by adsorbing to particle surfaces and providing electrostatic or steric stabilization. Common dispersants include polysorbates, lecithin, and alkyl glucosides. Mechanism involves surfactant adsorption creating repulsive forces preventing aggregation, flocculation, or settling. Critical for maintaining homogeneity in suspensions, preventing pigment agglomeration, and ensuring uniform product performance.
Products
containing Benzalkonium Chloride
One-step login · Made for your skin
Want analysis that actually fits your skin?
Sign in once — we'll remember your skin type and make every analysis more relevant for you. for free!
Joined by people who care about their skin
References
Scientific sources
Skinmed
May-June 2005
issue 3
pages 183-185
Similar Ingredients
Ingredients with similar chemical profiles and skincare properties.
Frequently Asked Questions
Benzalkonium Chloride — common questions
What is Benzalkonium Chloride in skincare?
Benzalkonium chloride is a preservative used in various cosmetic and personal care products, including shampoos, cleansers, skin care formulations, and eye makeup. It also functions as a foam booster and detergent, assisting in the removal of oil and dirt during cleansing.
What does Benzalkonium Chloride do? / Functions of Benzalkonium Chloride?
Common functions: ANTIMICROBIAL, ANTISTATIC, DEODORANT, PRESERVATIVE, SURFACTANT - DISPERSING.
What is the comedogenic rating of Benzalkonium Chloride? / Is Benzalkonium Chloride comedogenic?
The comedogenic rating of Benzalkonium Chloride has not been established in our database.
Does it clog pores?
Whether Benzalkonium Chloride clogs pores depends on the formulation and concentration.
Is Benzalkonium Chloride safe for skin?
Benzalkonium Chloride has a safety rating of 4 out of 5. A rating of 4 indicates significant safety concerns. Note: Quaternary ammonium preservative/surfactant; known skin/eye irritant and can cause allergic contact dermatitis especially in leave-on products or higher concentrations; generally safer when low-dose a
Is Benzalkonium Chloride good for sensitive skin?
Benzalkonium Chloride has an irritancy rating of 4 out of 5. A rating of 4 means it has high irritation potential.
What are the side effects of Benzalkonium Chloride in skincare?
Known considerations: Quaternary ammonium preservative/surfactant; known skin/eye irritant and can cause allergic contact dermatitis especially in leave-on products or higher concentrations; generally safer when low-dose and used in rinse-off products. The Cosmetic Ingredient Review (CIR) Panel has evaluated its safety for use in cosmetics at specified concentrations, but the Environmental Working Group (EWG) notes potential for sensitization. Safety concerns increase with prolonged or repeated exposure. Additional risks: skin irritation (irritancy rating 4/5).