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CAS 103-84-4

CAS 103-84-4 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 103-84-4
CAS 103-84-4PubChem CID 904

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. — ChEBI

IUPAC name
N-phenylacetamide
Molecular formula
C8H9NO
Molecular weight
135.16 g/mol
Exact mass
135.068413911 Da
XLogP3
1.2
Topological polar surface area
29.1 Ų
Hydrogen-bond donors
1
Hydrogen-bond acceptors
1
Covalent units
1
Defined stereocentres
0

Also known as

AntifebrinN-AcetylanilineAcetanilidAcetamidobenzeneAcetanilAcetylanilinePhenalgeneAcetamide, N-phenyl-
16 more reported names
AcetylaminobenzeneAcetic acid anilideAcetoanilidePhenalginAniline, N-acetyl-USAF EK-3Benzenamine, N-acetyl-AcetanilidumAntifebrinumNSC-7636SP86R356CCNSC-203231CHEBI:28884RefChem:6369203-150-7695-031-5
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

Evidence from additional scientific databases

EMBL-EBI ChEBI
Exact identifier matchCHEBI:28884

N-phenylacetamide

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.

Formula
C8H9NO
Average mass
135.166 g/mol
Monoisotopic mass
135.06841 Da
Formal charge
0
  • acetamides — is a (CHEBI:22160)
  • anilide — is a (CHEBI:13248)
  • analgesic — has role (CHEBI:35480)
  • acetic acid — has functional parent (CHEBI:15366)
  • analgesic — has role (CHEBI:35480)
  • acetamides — is a (CHEBI:22160)
  • anilide — is a (CHEBI:13248)
Additional curated names
N-phenylacetamideacetamidobenzeneAcetaminophen related compound dacetanilAcetanilidacetanilideAcetanilideAcetanilidumacetic acid anilideAntifebrinAntifebrinumN-acetylaminobenzeneN-AcetylarylamineN-PhenylacetamideNSC-203231NSC-7636
Cross-references from this source
  • CAS: 103-84-4 — NIST Chemistry WebBook
  • CAS: 103-84-4 — KEGG COMPOUND
  • CAS: 103-84-4 — ChemIDplus
  • MANUAL_X_REF: 54 — DrugCentral
  • MANUAL_X_REF: c0657 — UM-BBD
  • MANUAL_X_REF: C07565 — KEGG COMPOUND
  • MANUAL_X_REF: N-Phenylacetamide — Wikipedia
  • REGISTRY_NUMBER: 606468 — Reaxys
  • REGISTRY_NUMBER: 82833 — Gmelin

Mapped by: Exact CAS cross-reference in the ChEBI compound record. Source updated: 2019-02-18. Retrieved: 2026-08-31. Open source record

NIH PubChem PUG-View
Exact identifier match904

Attributed physical-property, hazard, environmental and use annotations.

  • First Aid: EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.; SKIN: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.; INHALATION: IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) shou Source: CAMEO Chemicals
  • Note: This chemical does not meet GHS hazard criteria for 0.1% (2 of 1686) of reports. Source: European Chemicals Agency (ECHA)
  • Signal: Warning Source: European Chemicals Agency (ECHA)
  • GHS Hazard Statements: H302 (99.9%): Harmful if swallowed [Warning Acute toxicity, oral] Source: European Chemicals Agency (ECHA)
  • Precautionary Statement Codes: P264, P270, P301+P317, P330, and P501 (click each P-code to see the statement) Source: European Chemicals Agency (ECHA)
  • ECHA C&L Notifications Summary: Aggregated GHS information provided per 1686 reports by companies from 15 notifications to the ECHA C&L Inventory.; Reported as not meeting GHS hazard criteria per 2 of 1686 reports by companies.; There are 14 notifications provided by 1684 of 1686 reports by companies with hazard statement code(s).; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
  • GHS Hazard Statements: H302 (100%): Harmful if swallowed [Warning Acute toxicity, oral]; H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]; H319 (100%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]; H335 (100%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation] Source: European Chemicals Agency (ECHA)
  • Precautionary Statement Codes: P261, P264, P264+P265, P270, P271, P280, P301+P317, P302+P352, P304+P340, P305+P351+P338, P319, P321, P330, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement) Source: European Chemicals Agency (ECHA)
  • ECHA C&L Notifications Summary: The GHS information provided by 1 company from 1 notification to the ECHA C&L Inventory. Source: European Chemicals Agency (ECHA)
  • Signal: Danger Source: NITE-CMC
  • GHS Hazard Statements: H302: Harmful if swallowed [Warning Acute toxicity, oral]; H320: Causes eye irritation [Warning Serious eye damage/eye irritation]; H336: May cause drowsiness or dizziness [Warning Specific target organ toxicity, single exposure; Narcotic effects]; H361: Suspected of damaging fertility or the unborn child [Warning Reproductive toxicity]; H370: Causes damage to organs [Danger Specific target organ toxicity, single exposure]; H372: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]; H402: Harmful to aquatic life [Hazardous to the aquatic environment, acute hazard] Source: NITE-CMC
  • Precautionary Statement Codes: P203, P260, P261, P264, P264+P265, P270, P271, P273, P280, P301+P317, P304+P340, P305+P351+P338, P308+P316, P318, P319, P321, P330, P337+P317, P403+P233, P405, and P501 (click each P-code to see the statement) Source: NITE-CMC
  • NFPA Health Rating: 3 - Materials that, under emergency conditions, can cause serious or permanent injury. Source: Hazardous Substances Data Bank (HSDB)
  • NFPA Fire Rating: 1 - Materials that must be preheated before ignition can occur. Materials require considerable preheating, under all ambient temperature conditions, before ignition and combustion can occur. Source: Hazardous Substances Data Bank (HSDB)
  • NFPA Instability Rating: 0 - Materials that in themselves are normally stable, even under fire conditions. Source: Hazardous Substances Data Bank (HSDB)
  • Environmental Bioconcentration: An estimated BCF value of 4.5 was calculated for acetanilide(SRC), using an experimental log Kow of 1.16(1,SRC) and a recommended regression-derived equation(2). According to a classification scheme(3), this BCF value suggests that bioconcentration in aquatic organisms is low(SRC). Source: Hazardous Substances Data Bank (HSDB)
  • Environmental Fate: TERRESTRIAL FATE: Based on a recommended classification scheme(1), a measured Koc value of 27(2,SRC), indicates that acetanilide will have very high mobility in soil(SRC). Volatilization of acetanilide from moist soil surfaces is not expected to be important(SRC) given an estimated Henry's Law constant of 6.2X10-9 atm-cu m/mole(SRC), using a fragment constant estimation method(3). The potential for volatilization of acetanilide from dry soil surfaces may not exist(SRC) based on the extrapolated vapor pressure of 1.2X10-3 mm Hg(4,SRC). Limited data suggest that acetanilide may undergo microbial degradation in soil. Source: Hazardous Substances Data Bank (HSDB)
  • Environmental Fate: AQUATIC FATE: Based on a recommended classification scheme(1), a measured Koc value of 27(2,SRC),indicates that acetanilide is not expected to adsorb to suspended solids and sediment in water(SRC). Acetanilide is not expected to volatilize from water surfaces(1,SRC) based on an estimated Henry's Law constant of 6.2X10-9 atm-cu m/mole(SRC), developed using a fragment constant estimation method(3). According to a classification scheme(5), an estimated BCF value of 4.5(1,SRC), from an experimental log Kow(4,SRC), suggests that bioconcentration in aquatic organisms is low(SRC). Acetanilide should biodegrade rapidly in aquatic systems. Hydrolysis of acetanilide is not expected to be an environmentally important removal process in aquatic systems(SRC). Source: Hazardous Substances Data Bank (HSDB)
  • Environmental Fate: ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), acetanilide, which has an extrapolated vapor pressure of 1.2X10-3 mm Hg at 25 °C(2,SRC), will exist solely as a vapor in the ambient atmosphere. Vapor-phase acetanilide is degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals(SRC); the half-life for this reaction in air is estimated to be about 1.3 days(3,SRC). Source: Hazardous Substances Data Bank (HSDB)

Mapped by: Existing checksum-valid CAS to unique PubChem CID match. Retrieved: 2026-08-31. Open source record

Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.

Additional source coverage and match status
SourceResultChecked
EMBL-EBI ChEBIExact match2026-08-31
NIH PubChem PUG-ViewExact match2026-08-31

A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

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CAS 103-84-4 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 0 EU annex records share this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 103-84-4 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.