preservative

Benzyl Alcohol

Also known as BenzylAlcohol
INCI: BENZYL ALCOHOL
CAS 100-51-6 EC 202-859-9
chemical compound
Limited Data
Insufficient safety data available. Consider enriching this ingredient.
Details

Description

chemical compound

Purpose

Function

fragrance; preservative; solvent
Profile

Properties

Silicone
Silicone free
Compliance

Regulatory Status

EU
Restricted
Safety
MODERATE
US
Permitted
EU Max Concentration1% as preservative in cosmetics (Annex V); labelling required >10 ppm leave-on / >100 ppm rinse-off as fragrance
Absorptionmoderate
Sensitizationhigh
MoSnot established
NOAEL400 mg/kg
ConcernModerate
Flags
preservativemicrobiome-disruptivecommensal-inhibitorin-vitro-concerneu_children_restrictedepa_safer_alternativeifra_fragrancefda_food_additiveeu_cosing_listed
Verdict

Preservative with recognized in vitro evidence of broad inhibition of skin commensal flora at maximum allowed concentrations, alongside phenoxyethanol and parabens. Beneficial skin bacteria appear more sensitive to it than pathogens. Microbiome-neutral formulation strategies including hurdle technology, low-pH systems, and reduced concentrations are preferred for microbiome-positioned products.

US Note

Permitted as both fragrance and preservative; GRAS status; RIFM-assessed

Assessment

Ratings

Comedogenic0/5
LowHigh
Irritancy0/5
LowHigh
Reference

Identifiers

CAS Number
100-51-6
EC Number
202-859-9
INCI
BENZYL ALCOHOL
Category
preservative
Updated
Apr 2, 2026