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Impurities and reference standards

4-Ethylphenol

Also known as p-Ethylphenol, Phenol, 4-ethyl-, Phenol, p-ethyl-

CAS 123-07-9Formula C8H10OMolar mass 122.17 g/molEC 204-598-6
GHS signal word: Danger. Pictograms: Corrosive 37 suppliers listed
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4-Ethylphenol chemical structure, C8H10O, CAS 123-07-9
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless or white needles, tend to yellow on exposure to light
Melting point
46 °C
Boiling point
217.9 °C
Density
1.011 @ 20 °C
Flash point
104 °C
HS code
290719
Category
Impurities and reference standards
Illustrative photo, colourless crystals beside an amber glass bottle on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is 4-Ethylphenol?

Plain description, key identifiers and synonyms

4-ethylphenol is a member of the class of phenols carrying an ethyl substituent at position 4. It has a role as a fungal xenobiotic metabolite.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
4-ethylphenol
CAS number
123-07-9 CAS number cross-checkedOther or deprecated CAS: 152399-67-2, 29471-88-3
EC number
204-598-6
Molecular formula
C8H10O
UNII
AGG7E6G0ZC
MDL number
MFCD00002393
INCI name
4-ETHYLPHENOL
InChIKey
HXDOZKJGKXYMEW-UHFFFAOYSA-N
InChI
InChI=1S/C8H10O/c1-2-7-3-5-8(9)6-4-7/h3-6,9H,2H2,1H3
SMILES (canonical and isomeric)
CCC1=CC=C(C=C1)O

Synonyms

  • p-Ethylphenol
  • Phenol, 4-ethyl-
  • Phenol, p-ethyl-
  • 1-Ethyl-4-hydroxybenzene
  • 1-Hydroxy-4-ethylbenzene
  • para-Ethylphenol
  • 4-Hydroxyphenylethane
  • Paraethylphenol
  • 4-ethyl-phenol
  • Phenol, 3(or 4)-ethyl-
  • (4-hydroxyphenyl)ethane
  • Benzene,1-ethyl,4-hydroxy
  • 4-Hydroxyethylbenzene
  • Hydroxyphenylethane, p-
  • 4-ethyl phenol
  • p-ethyl phenol
  • 4-ethyl- phenol
  • 4-ethyl-phenyl alcohol
  • 2ra6
  • 4-Etilfenol
  • 4-Ethylphenol, 99%
  • Metacresol EP Impurity K
  • p-ETHYLPHENOL, PRACT
  • p-Hydroxyethylbenzene
  • 4-06-00-03020 (Beilstein Handbook Reference)
Show all 29 synonyms
  • (P-Hydroxyphenyl)ethane
  • 4-Ethylphenol, >=98%, FG
  • p-Ethylphenol, 4-Hydroxyphenylethane
  • 4-Ethylphenol, >=97.0% (GC)

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
Colorless or white needles, tend to yellow on exposure to lightexp.
Odour
POWERFUL WOODY-PHENOLIC, YET SOMEWHAT SWEETexp.
Taste
SWEET SMOKEYexp.
Melting point
46 °Cexp.
Boiling point
217.9 °Cexp.
Density
1.011 @ 20 °Cexp.
Flash point
104 °Cexp.
Solubility
SLIGHTLY SOL IN WATER, SOL IN ALC, ETHER, & BENZENE, SOL IN CARBON DISULFIDE, & ACETONEexp.
Vapour pressure
0.0372 mm Hg at 25 °C.exp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
122.17 g/molcalc.
Exact mass
122.0732 Dacalc.
LogP (octanol/water)
1.95calc.
Topological polar surface area
20.23 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
1calc.
Heavy atoms
9calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.25calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccccc1

c1ccccc1

1 ring, 6 atoms, the Benzene ring system.

485,677 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS05: Corrosive
Corrosive
120NFPA 704 rating

Hazard statements

  • H314Causes severe skin burns and eye damage.
  • H318Causes serious eye damage.
Precautionary statements (14)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • P317Get medical help.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P363Wash contaminated clothing before reuse.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

4-Ethylphenol suppliers

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All 37 suppliers
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Where suppliers are based

37 suppliers in 9 countries

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4-Ethylphenol price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Synthetic flavor.

4-Ethylphenol is contained in the xylenol fraction boiling between ca. 205 and 225 °C obtained from tar phenols, which is used, for example, for the production of phenolic resins. A xylenol fraction boiling between 216 and 218 °C containing predominantly 3- and 4-ethylphenol is obtained from brown coal low-temperature tar and used in the varnish industry.

Pure 4-ethylphenol is the starting material for the production of 4-vinylphenol and of various antioxidants (eg, 2,6-di-t-butyl-4-ethylphenol and 2,2'-methylenebis(6-t-butyl-4-ethylphenol)), which are used in rubber and polymers. 4-Ethylphenol is an intermediate for pharmaceuticals and dyes.

Industrial uses: Corrosion inhibitor, Cleaning agent, Solvent.

Consumer uses: Solvent, Cleaning agent.

Cosmetic ingredient, INCI name 4-ETHYLPHENOL(perfuming)

Roles

  • eukaryotic metabolite
  • fungal metabolite
  • fungal xenobiotic metabolite
  • metabolite
  • xenobiotic metabolite

Functional uses

  • Flavouring and nutrient
  • Fragrance
  • Processing aids not otherwise specified
  • Surface modifier

Cosmetic functions

  • Perfuming

How it is made

By catalytic reaction between phenol & ethylene or ethanol, by heating 8-chloro-3-ethylbenzene with sodium hydroxide in the presence of copper powder.

A mixture of m-ethylphenol and p-ethylphenol is produced from low temperature tar using the coalite process.

4-Ethylphenol is produced industrially by sulfonation of ethylbenzene under mild (kinetically controlled) conditions and subsequent alkali fusion of the 4-ethylbenzenesulfonic acid obtained.

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code 4-Ethylphenol is traded under.

HS 2907.19Indicative HS code

Monophenols, other

World exports in 2024
$671M
+2.2% vs 2023, imports $781M
2019 to 2024
Top exporters
  1. China20.1%
  2. Germany14.4%
  3. Switzerland * partner reported11.1%
Top importers
  1. China16.3%
  2. Germany10.1%
  3. South Korea8.0%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for 4-Ethylphenol is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about 4-Ethylphenol, based on the data on this page

What is 4-Ethylphenol?

4-ethylphenol is a member of the class of phenols carrying an ethyl substituent at position 4. It has a role as a fungal xenobiotic metabolite.

What is the CAS number of 4-Ethylphenol?

The CAS registry number of 4-Ethylphenol is 123-07-9. Other or deprecated CAS numbers: 152399-67-2, 29471-88-3.

What is the molecular formula and weight of 4-Ethylphenol?

The molecular formula of 4-Ethylphenol is C8H10O and its molar mass is 122.17 g/mol.

What is 4-Ethylphenol used for?

Synthetic flavor. 4-Ethylphenol is contained in the xylenol fraction boiling between ca. 205 and 225 °C obtained from tar phenols, which is used, for example, for the production of phenolic resins.

Is 4-Ethylphenol hazardous?

4-Ethylphenol carries the GHS signal word "Danger". Main hazards: causes severe skin burns and eye damage, causes serious eye damage. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of 4-Ethylphenol?

4-Ethylphenol is usually classified under HS code 290719 (Monophenols, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy 4-Ethylphenol?

CompoundList lists 37 suppliers of 4-Ethylphenol in China, United States, France, Japan and 5 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy 4-Ethylphenol in India?

1 supplier in India list 4-Ethylphenol on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of 4-Ethylphenol?

Suppliers quote 4-Ethylphenol on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle 4-Ethylphenol

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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