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Synthetic aroma chemicals

Acetanilide

Also known as N-Phenylacetamide, Antifebrin, N-Acetylaniline

CAS 103-84-4Formula C8H9NOMolar mass 135.17 g/molEC 203-150-7
GHS signal word: Warning. Pictograms: Harmful or irritant 114 suppliers listed Drug substance
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Acetanilide chemical structure, C8H9NO, CAS 103-84-4
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Orthorhombic plates or scales from water
Melting point
114.3 °C
Boiling point
304 °C
Density
1.2190 @ 15 °C
Flash point
169 °C
HS code
292429
Category
Synthetic aroma chemicals
Illustrative photo, closed white HDPE bottles and amber jars on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Acetanilide?

Plain description, key identifiers and synonyms

N-phenylacetamide is a member of the class of acetamides that is acetamide in which one of the hydrogens attached to the nitrogen is substituted by a phenyl group. It has a role as an analgesic. It is an anilide and a member of acetamides. It is functionally related to an acetic acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
N-phenylacetamide
CAS number
103-84-4 CAS number cross-checkedOther or deprecated CAS: 137020-73-6
EC numbers
203-150-7, 695-031-5
Molecular formula
C8H9NO
UNII
SP86R356CC
MDL number
MFCD00008674
INCI name
ACETANILID
InChIKey
FZERHIULMFGESH-UHFFFAOYSA-N
InChI
InChI=1S/C8H9NO/c1-7(10)9-8-5-3-2-4-6-8/h2-6H,1H3,(H,9,10)
SMILES (canonical and isomeric)
CC(=O)NC1=CC=CC=C1

Synonyms

  • N-Phenylacetamide
  • Antifebrin
  • N-Acetylaniline
  • Acetanilid
  • Acetamidobenzene
  • Acetanil
  • Acetylaniline
  • Phenalgene
  • Acetamide, N-phenyl-
  • Acetylaminobenzene
  • Acetic acid anilide
  • Acetoanilide
  • Phenalgin
  • Aniline, N-acetyl-
  • USAF EK-3
  • Benzenamine, N-acetyl-
  • Acetanilidum
  • Antifebrinum
  • N-acetylarylamine
  • N-Acetylaminobenzene
  • AN [Analgesic]
  • Ethananilide
  • N-Phenyl-acetamide
  • Acetanilide (Antifebrin)
  • Acetanilide (Acetylaniline)
Show all 36 synonyms
  • N-Phenylacetamide, N-Phenylacetamide
  • N-Phenylacetamide (Acetanilide)
  • Acetamide, N-(phenyl-13C6)-
  • N-phenylethanamide
  • Acetic acid amide, N-phenyl-
  • PhNHAc
  • N-phenyl acetamide
  • Acetanilide, 99%
  • N-Acetyl-benzenamine
  • Acetanilide M.P. RS
  • AZOBENZENE_met003

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
Orthorhombic plates or scales from waterexp.
Odour
ODORLESSexp.
Taste
SLIGHTLY BURNINGexp.
Melting point
114.3 °Cexp.
Boiling point
304 °Cexp.
Density
1.2190 @ 15 °Cexp.
Flash point
169 °Cexp.
Autoignition temperature
-23.3 °Cexp.
Solubility
1 G SOL IN 185 ML WATER, 3.4 ML ALC, 20 ML BOILING WATER, 3 ML METHANOL, 4 ML ACETONE, 0.6 ML BOILING ALCOHOL, IN 3.7 ML CHLOROFORM, 5 ML GLYCEROL, 8 ML DIOXANE, 47 ML BENZENE, 18 ML ETHER, VERY SPARINGLY SOL IN PETROLEUM ETHER, CHLORAL…exp.
Vapour pressure
1.22 × 10⁻³ mm Hg at 25 °Cexp.

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
135.17 g/molcalc.
Exact mass
135.0684 Dacalc.
LogP (octanol/water)
1.64calc.
Topological polar surface area
29.1 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
1calc.
Heavy atoms
10calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.13calc.
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
Warning
GHS07: Harmful or irritant
Harmful or irritant
130NFPA 704 rating

Hazard statements

  • H302Harmful if swallowed.
Precautionary statements (5)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P301 + P317If swallowed: Get medical help.
  • P330Rinse mouth.
  • 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

Acetanilide suppliers

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All 114 suppliers
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Where suppliers are based

114 suppliers in 25 countries

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Acetanilide 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

Manufacture of medicinals, dyes, stabilizer for hydrogen peroxide, as addn to cellulose ester varnishes.

Rubber accelerator.

Manufacture of intermediates, in synthetic camphor, precursor in penicillin manufacture.

Intermediate for sulfa drugs, hydrogen peroxide stabilizer, azo dye manufacture.

Use classes: Pharmaceuticals, Cosmetics.

Cosmetic ingredient, INCI name ACETANILID(fragrance, perfuming)

Roles

  • analgesic
  • pharmaceutical

Functional uses

  • Deodorizer
  • Fragrance
  • Stabilizing agent

Cosmetic functions

  • Fragrance
  • Perfuming

How it is made

Usually prepared from aniline & acetic acids: ai vogel, practical organic chemistry, (london, 3rd ed 1959), page 577. From aniline & acetyl chloride: gattermann-wieland, praxis des organischen chemikers, (berlin, 40th ed, 1961) page 114.

From aniline, acetone & ketene: hurd, org syn, coll vol i, (new york, 2nd ed, 1941) page 332.

Heating aniline with acetic anhydride.

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory
  • Active ingredient in FDA approved drug labels

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 Acetanilide is traded under.

HS 2924.29Indicative HS code

Cyclic amides (including cyclic carbamates) and their derivatives, salts thereof, other

World exports in 2024
$5.69B
−5.1% vs 2023, imports $5.8B
2019 to 2024
Top exporters
  1. China32.3%
  2. Switzerland * partner reported13.6%
  3. Norway * partner reported12.8%
Top importers
  1. United States15.9%
  2. Ireland15.8%
  3. Germany11.9%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Acetanilide, based on the data on this page

What is Acetanilide?

N-phenylacetamide is a member of the class of acetamides that is acetamide in which one of the hydrogens attached to the nitrogen is substituted by a phenyl group. It has a role as an analgesic. It is an anilide and a member of acetamides. It is functionally related to an acetic acid.

What is the CAS number of Acetanilide?

The CAS registry number of Acetanilide is 103-84-4. Other or deprecated CAS numbers: 137020-73-6.

What is the molecular formula and weight of Acetanilide?

The molecular formula of Acetanilide is C8H9NO and its molar mass is 135.17 g/mol.

What is Acetanilide used for?

Manufacture of medicinals, dyes, stabilizer for hydrogen peroxide, as addn to cellulose ester varnishes. Rubber accelerator. Manufacture of intermediates, in synthetic camphor, precursor in penicillin manufacture. Intermediate for sulfa drugs, hydrogen peroxide stabilizer, azo dye manufacture.

Is Acetanilide hazardous?

Acetanilide carries the GHS signal word "Warning". Main hazards: harmful if swallowed. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Acetanilide?

Acetanilide is usually classified under HS code 292429 (Cyclic amides (including cyclic carbamates) and their derivatives, salts thereof, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Acetanilide?

CompoundList lists 114 suppliers of Acetanilide in China, United States, India, Germany and 21 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Acetanilide in India?

10 suppliers in India list Acetanilide on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Acetanilide?

Suppliers quote Acetanilide 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 Acetanilide

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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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