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Moumoujus

2,4-XYLENOL.

Avoid CAS 105-67-9 / PERFUMING

2,4-Xylenol is a phenolic compound primarily utilized in skincare as a fragrance component and antimicrobial agent rather than an active treatment ingredient. While effective at disrupting microbial cell membranes, its high irritation potential and tissue-destructive properties at therapeutic concentrations make it unsuitable for most consumer skincare applications.

Summary

Perfuming Antimicrobial

Science

Mechanism of Action

Functions as a phenolic antimicrobial by disrupting bacterial cell membranes and denaturing proteins. At higher concentrations, it exhibits keratolytic and caustic effects through protein coagulation and tissue destruction.

Research

Clinical Evidence

Medium confidence
Effective range 0.463–1.5%
Optimal

N/A

Key findings

  1. 01 EPA studies demonstrate 0.463% concentration effectively eliminates crown gall bacteria in agricultural applications
  2. 02 Industrial disinfectant formulations utilize 1.5% concentration for broad-spectrum antimicrobial activity

Transparency

Dusting Analysis

Not commonly dusted
Red flag below
0.5%

Rarely included in consumer skincare due to high irritation potential; concentrations above 0.5% indicate industrial or therapeutic applications unsuitable for daily use

The Formula

Formulation

Solubility
Both
Optimal pH 4 – 6
0 7 14

Stability

Maintains stability under standard storage conditions but oxidizes when exposed to air, developing brown discoloration over time. Most antimicrobially active in slightly acidic environments due to weak acid properties (pKa 10.6).

Conflicts

  • Alkaline ingredients
  • Acid chlorides
  • Acid anhydrides
  • Oxidizing agents
  • Copper-containing formulations
  • Brass-containing formulations
  • Steel-containing formulations

Safety

Safety Profile

CIR Status
Not reviewed by CIR
Max tested
1%
Pregnancy
Caution
Sensitization risk High

Classified as toxic in skin contact (H311) and causes severe burns at elevated concentrations. Regulated under IFRA guidelines when used as fragrance component. FDA recognizes as indirect food additive.

Your Skin

Skin Compatibility

No Normal
No Dry
No Oily
No Sensitive
Irritancy High
Comedogenicity Unknown

Our Assessment

Verdict

Avoid

High irritation potential and tissue-destructive properties make this ingredient unsuitable for consumer skincare applications.

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