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Ingredients

Ingredient Dictionary

TRICLOSAN

Triclosan is an aromatic ether that is phenol which is substituted at C-5 by a chloro group and at C-2 by a 2,4-dichlorophenoxy group.

Molecular structure

Definition

US FDA substance register · UNII 4NM5039Y5X · registered name TRICLOSAN · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Triclosan is an aromatic ether that is phenol which is substituted at C-5 by a chloro group and at C-2 by a 2,4-dichlorophenoxy group. It is widely used as a preservative and antimicrobial agent in personal care products such as soaps, skin creams, toothpaste and deodorants as well as in household items such as plastic chopping boards, sports equipment and shoes. It has a role as an EC 1.3.1.9 [enoyl-[acyl-carrier-protein] reductase (NADH)] inhibitor, a fungicide, an antibacterial agent, a xenobiotic, an antimalarial, an EC 1.5.1.3 (dihydrofolate reductase) inhibitor, a persistent organic pollutant and a drug allergen. It is a dichlorobenzene, a member of phenols, an aromatic ether and a member of monochlorobenzenes.

Source: PubChem

Triclosan is the substituted organic ether that conforms to the formula:

Cosmetic roles

Stops microbes growing in the productPRESERVATIVEReduces body odourDEODORANTInhibits microbial growthANTIMICROBIAL

Safety & regulatory references

Restricted
South Korea · Taiwan
Allowed preservative
Taiwan · United Kingdom

Source: ASEAN Cosmetic Directive · Health Canada Cosmetic Ingredient Hotlist · MFDS (Korea) cosmetic regulatory information · EU Cosmetics Regulation · Taiwan FDA cosmetic ingredients · UK cosmetics regulations (OPSS)

Argentina · Brazil

  • Maximum concentration permitted at final product : 0.3%

ASEAN

  • Field of application and/or use : a) Toothpastes Hand soaps Body soaps/Shower gels Deodorants (non-spray) Face powders and blemish concealers Nail products for cleaning the fingernails and toenails before the application of artificial nail systems Shampoos Hair Conditioners Facial Cleansers (b) Mouthwashes
  • Maximum authorised concentration in the finished cosmetic product : (a) 0.3 % (b) 0.2 %

Canada

  • Conditions of Use by product type : (a) Mouthwashes (b) Other cosmetics (c) All oral products must meet the following conditions: Manufacturers must ensure that polychlorinated dibenzo‐p‐dioxin (PCD(d) and polychlorinated dibenzofuran (PCDF) impurities must not be present in quantities that exceed: (i) 0,1 ng/g 2,3,7,8‐tetrachlorodibenzo p‐dioxin and 2,3,7,8‐tetrachlorodibenzofuran. (ii)10 μg/g total other PCDD/PCDF impurities, with no individual impurity greater than 5 μg/g. Manufacturers must possess the following: (i) Raw material specifications for triclosan; (ii) Identification of the method of analysis used to determine the levels of PCDDs and PCDFs in triclosan; (iii) Finished product specifications.
  • Maximum Concentration Permitted : ((a) 0.03% (b) 0.3%
  • Warnings and Cautionary Statements: (to the effect of) : (a) "Avoid swallowing." "The product is not to be used by children under the age of 12." (c) “Avoid swallowing.” “The product is not to be used by children under the age of 12.”

Japan

  • Maximum amount per 100 g(Maximum amount of ingredient per 100 g) : 0.10 g(0.10 g)

China

  • Maximum concentration : 0.3%

European Union

  • Product Type, body parts : (a) Toothpastes, hand soaps, Body soaps/Shower gels, Deodorants (non-spray), Face powders and blemish concealers. Nail products for cleaning the fingernails and toenails before the application of artificial nail systems. (b) Mouthwashes
  • Maximum concentration in ready for use preparation : (a) 0.3% (b) 0,2%

Source: MFDS (Korea) cosmetic regulatory information

Korea’s toxic-substance GHS classification: Warning · H410 (category 1) · H315 (category 2) · H400 (category 1)

Source: Korea toxic substances GHS register (NIER)

EU Cosmetics Regulation, Annex V (allowed preservatives), entry 25 · maximum concentration 0.3% · applies to Toothpastes; Hand soaps; Body soaps/Shower gels; Deodorants (non-spray); Face powders and blemish concealers; Nail products for cleaning the fingernails and toenails before the application of artificial nail systems;

Source: EU allowed preservatives (Annex V)

Restriction V/25 · Other restriction: ban substances that deplete the ozone layer · SCCS opinion: Oinion on Triclosan Addenum to the SCCP opinion on Triclosan; Opinion concerning Triclosan; Opinion on Triclosan; Opinion on Triclosan Anti-microbial Resistance

Source: EU CosIng ingredient list

Reviewed by CIR: Final Report: Safety Assessment of Triclosan as a Used in Cosmetics

Source: US Cosmetic Ingredient Review (CIR)

More data — names, identifiers, properties, test records, literature

Official labels & definitions

JCIA labelling name トリクロサン: 本品は、次の化学式で表される芳香族エーテル誘導体である。

Source: JCIA labelling names (Japan)

Names & identifiers

TRICLOSANINCI트리클로산Korean label name (MFDS standard)Phenol, 5-chloro-2-(2,4-dichlorophenoxy)-SynonymトリクロサンJapanese labelling name
CAS No.chemical registry number
3380-34-5
EC No.EU chemical inventory number
222-182-2
DTXSIDUS EPA chemical ID
DTXSID5032498
DTXCIDUS EPA compound ID
DTXCID3012498
IUPAC
5-Chloro-2-(2,4-dichlorophenoxy)phenol
Molecular formula
C12H7Cl3O2
Molecular weight
289.54 g/mol

Measured properties

Appearance
solid · White to off-white crystalline powder, [HSDB]
Colour
at 20°C, 1013 hPa
Melting/freezing point
56.4 ℃
Initial boiling point and range
253 ℃
Flash point
162.2 ℃
Vapour pressure
0.0003 ㎩ (at 20°C)
Water solubility
0.012 (20 °C, g/L)
Relative density
1550 kg/m³ (at 22 °C)
n-Octanol/water partition coefficient (Kow)
4.8 (at 25 °C, pH 6.7)
Decomposition temperature
&amp, gt, 253 ℃
Molecular weight
289.54
Odour
Slight, faintly aromatic odor
Boiling point
120 °C · 280 to 290 °C (decomposes)
Melting point
55-57 °C · 54-57.3 °C
Solubility
In water, 10 mg/L at 20 °C · Slightly soluble in water
Stability
Stable under recommended storage conditions.
Dissociation constant
7.9 · pKa = 7.9

Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.

Source: KOSHA safety data sheets (Korea) · PubChem

What products actually use it for

What the 22 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.

  • Biocide12
  • Preservative6
  • Deodorizer3
  • Processing aids not otherwise specified1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

4 skin studies and 3 eye studies are on record.

Classed as moderate1

The study conclusions largely agree (100%). These tests are on the raw material itself; irritation at the amount in a finished product is a different question.

See all 7 studies
  • Classification not possible
    Skin Sensitization · Screening
  • Not classified
    Skin Irritation · Screening
  • Skin Irrit. 2
    Skin Irritation · Authoritative
  • Category 6.3A (Category 2)
    Skin Irritation · Read Across
  • Eye Irrit. 2
    Eye Irritation · Authoritative
  • Category 6.4A (Category 2A)
    Eye Irritation · Read Across
  • Classification not possible
    Eye Irritation · Screening

Source: US EPA CompTox dashboard

Related literature

Linked databases 31