Triclosan
AKA “4-DICHLOROPHENOXY)PHENOL, Cloxifenolum, 4'-Trichloro-2'-hydroxydiphenyl ether, Triclosanum, Irgasan DP300, Stri-Dex Cleansing Bar, Stri-Dex Face Wash, CH 3565
Synthetic
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Ingredient Facts
Triclosan
AKA: 4-DICHLOROPHENOXY)PHENOL, Cloxifenolum, 4'-Trichloro-2'-hydroxydiphenyl ether, Triclosanum, Irgasan DP300, Stri-Dex Cleansing Bar, Stri-Dex Face Wash, CH 3565
Synthetic · Preservative | Deodorant · EWG: 4
Plant-Derived
Preservative
Synthetic
Not Clean
A preservative and deodorant ingredient that helps keep products fresh and effective by preventing bacterial growth.
Solubility In water, 10 mg/L at 20 °C
Formula
C12H7Cl3O2
Mol. Weight
289.50
CAS #
3380-34-5
Plant-Derived
Synthetic. Triclosan is synthesized from chlorinated phenolic compounds derived from petrochemical sources. It is produced through chlorination and condensation reactions of 2,4,4'-trichloro-2'-hydroxydiphenyl ether precursors.
Function
Preservative | Deodorant
Benefits
Fights Bacteria
Controls Odor
Preserves Formula
Neutralizes odor
Prevents microbial growth
Traditional Use
This is the CAS number for Ascorbyl Palmitate, a stabilized form of Vitamin C developed in the mid-20th century. Created to improve the shelf-stability of vitamin C in skincare formulations while maintaining antioxidant properties.
Skin Types
all-skin-types
Best For
Target
General
Melanin-Rich Skin
Suitable
EWG Score4
CIR Safety Findings
all-shades-safe, Not a Sensitizer
Concentration Guide
2.0%
0%3%
Reg. Limit
EU regulatory limit: 2.0%. (a) 0.3% (b) 0,2% Source: EU Cosmetics Regulation (EC) 1223/2009, Annex V (Preservatives), Entry 25.
Regulatory Status
USAunder review
CANADApermitted
Regulatory Agencies
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR