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Ingredients

Ingredient Dictionary

P-CHLORO-M-CRESOL

4-chloro-m-cresol is a hydroxytoluene that is 3-methylphenol which is substituted by a chlorine at position 4.

Korean limit
0.04%
Molecular structure

Definition

p-Chloro-m-Cresol is the substituted phenol that conforms to the formula:

4-chloro-m-cresol is a hydroxytoluene that is 3-methylphenol which is substituted by a chlorine at position 4. A ryanodine receptor agonist. It has a role as an antimicrobial agent, a disinfectant and a ryanodine receptor agonist. It is a hydroxytoluene and a member of monochlorobenzenes.

Source: PubChem

US FDA substance register · UNII 36W53O7109 · registered name CHLOROCRESOL · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Inhibits microbial growthANTIMICROBIALStops microbes growing in the productPRESERVATIVE

Safety & regulatory references

Allowed preservative
United Kingdom

Source: ASEAN Cosmetic Directive · EU Cosmetics Regulation · Japan Standards for Cosmetics · Taiwan FDA cosmetic ingredients · UK cosmetics regulations (OPSS)

Argentina · Brazil

  • Maximum concentration permitted at final product : 0.2%
  • Other limitations and requirements : Prohibited in products intended to come into contact with mucous.

ASEAN

  • Maximum authorised concentration in the finished cosmetic product : 0.2%
  • Other limitations and requirements : Prohibited in products intended to come into contact with mucous membranes

Canada

  • Conditions of Use by product type : (a) Not permitted in cosmetics intended to be used on or around mucosal membranes such as eyes, nose or mouth (b) Other cosmetics
  • Maximum Concentration Permitted : (b) 0.1%
  • Warnings and Cautionary Statements: (to the effect of) : "Do not use in the area of the eye, mouth or nose"

Taiwan

  • 0.2%

Japan

  • Maximum amount per 100 g(Maximum amount of ingredient per 100 g) : 0.50(0.50 g)

China

  • Maximum concentration : 0.2%

South Korea

  • Maximum concentration : 0.04%

European Union

  • Product Type, body parts : Not to be used in products applied on mucous membranes
  • Maximum concentration in ready for use preparation : 0.2%

Source: MFDS (Korea) cosmetic regulatory information

Not classified under Korea’s toxic-substance GHS list · existing chemical substance

Source: Korea toxic substances GHS register (NIER)

EU Cosmetics Regulation, Annex V (allowed preservatives), entry 24 · maximum concentration 0.2% · applies to Not to be used in products applied on mucous membranes

Source: EU allowed preservatives (Annex V)

Restriction V/24 · Other restriction: ban substances that deplete the ozone layer

Source: EU CosIng ingredient list

Reviewed by CIR: Final Report on the Safety Assessment of Sodium p-Chloro-m-Cresol, p-Chloro-m-Cresol, Chlorothymol, Mixed Cresols, m-Cresol, o-Cresol, p-Cresol, Isopropyl Cresols, Thymol, o-Cymen-5-ol and Carvacrol

Source: US Cosmetic Ingredient Review (CIR)

Reviewed by CIR: Final Report on the Safety Assessment of p-Chloro-m-Cresol

Source: US Cosmetic Ingredient Review (CIR)

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

Official labels & definitions

JCIA labelling name クロルクレゾール: 本品は、次の化学式で表されるメタクレゾールの誘導体である。

Source: JCIA labelling names (Japan)

JCIA labelling name p-クロロ-m-クレゾール: 本品は、次の化学式で表されるメタクレゾールの誘導体である。

Source: JCIA labelling names (Japan)

Names & identifiers

P-CHLORO-M-CRESOLINCIPhenol, 4-chloro-3-methyl-Synonymp-클로로-m-크레졸Korean label name (MFDS standard)p-クロロ-m-クレゾールJapanese labelling nameクロルクレゾールJapanese labelling name
CAS No.chemical registry number
59-50-7
EC No.EU chemical inventory number
200-431-6
DTXSIDUS EPA chemical ID
DTXSID4021717
DTXCIDUS EPA compound ID
DTXCID601717
IUPAC
4-Chloro-3-methylphenol
Molecular formula
C7H7ClO
Molecular weight
142.58 g/mol

Measured properties

Appearance
Chlorocresol appears as a pinkish to white crystalline solid with a phenolic odor. Melting point 64-66 °C. Shipped as a solid or in a liquid carrier. Soluble in aqueous base. Toxic by ingestion, inhalation or skin absorption. Used as an external germicide. Used as a preservative in paints and inks. · White to slightly pink crystals, Odorless or slightly phenolic odor, [CHEMINFO]
Odour
Said to be odorless when very pure, but usually a phenolic odor persists
Boiling point
455 °F at 760 mmHg (NTP, 1992) · 235 °C
Melting point
151 °F (NTP, 1992) · 67 °C
Solubility
less than 1 mg/mL at 68 °F (NTP, 1992) · Soluble in alkalies, organic solvents, fats, and oils
Density
0.9 at 77 °F (NTP, 1992) - Less dense than water, will float · 1.37 g/cu cm
Stability
Aq solns turn yellow on exposure to light and air. · Stable at normal and elevated temperature over a period of 14-day period. Corrosive to metals and forms complex compounds with transition metal ions. Slow discoloration of the chemical occurs in the presence of sunlight. /In storage,/ stable for 12 months.
pH
pH = 5.6 in saturated aqueous solution · 5.6
Dissociation constant
pKa = 9.55
Odour threshold
0.1 ppm
Melting/freezing point
67 ℃
Initial boiling point and range
235 ℃
Flash point
118 ℃
Vapour pressure
0.05 ㎜Hg (20℃)
Water solubility
0.383 g/100㎖ (25℃)
Relative density
1.4
n-Octanol/water partition coefficient (Kow)
3.1
Auto-ignition temperature
590 ℃
Molecular weight
142.59

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: PubChem · KOSHA safety data sheets (Korea)

What products actually use it for

What the 15 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.

  • Biocide10
  • Preservative4
  • Processing aids not otherwise specified1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

8 skin studies and 4 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 12 studies
  • Category 6.5B (Category 1)
    Skin Sensitization · Read Across
  • High Frequency of Sensitization
    skin sensitisation: in vivo (non-LLNA) · Screening · according to other guideline:
  • High Frequency of Sensitization
    skin sensitisation · Screening · according to other guideline:
  • Classification not possible
    Skin Irritation · Screening
  • Skin Sens. 1
    Skin Sensitization · Authoritative
  • Corrosive
    skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) according to
  • Category 1
    Skin Sensitization · Screening
  • Sh
    Skin Sensitization · Authoritative
  • Eye Dam. 1
    Eye Irritation · Authoritative
  • Category 1
    Eye Irritation · Screening
  • Corrosive or Irritation Persists for > 21 days
    eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) according to
  • Category 8.3A (Category 1)
    Eye Irritation · Read Across

Source: US EPA CompTox dashboard

Related literature

Linked databases 29