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InventoryRef 9523330/04/2018

PENTANONE

2-Pentanone

PENTANONE is listed in the EU CosIng inventory, but no direct annex records are linked on this page yet.

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Regulatory evidence by market

No rule for this ingredient has been imported for any of the 13 markets tracked here.

That describes this inventory, not the law. No imported rule is not evidence that an ingredient is permitted: a rule may exist under another name or identifier, or in a dataset not yet imported here.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 107-87-9
CAS 107-87-9PubChem CID 7895

2-Pentanone

Methyl propyl ketone appears as a clear colorless liquid with the odor of fingernail polish. Flash point 45 °F. Less dense than water and soluble in water. Hence floats on water. Density 0.809 g / cm3. Vapors heavier than air. — CAMEO Chemicals

IUPAC name
pentan-2-one
Molecular formula
C5H10O
Molecular weight
86.13 g/mol
Exact mass
86.073164938 Da
XLogP3
0.9
Topological polar surface area
17.1 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
1
Covalent units
1
Defined stereocentres
0

Also known as

METHYL PROPYL KETONEEthyl acetoneEthylacetoneMethyl n-propyl ketonePropyl methyl ketoneMetylopropyloketonMethylpropyl ketoneMethyl-propyl-cetone
16 more reported names
FEMA No. 2842FEMA Number 28424-methyl-2-butanoneMethyl-n-propyl ketoneAI3-32118NSC-5350CHEBI:16472RefChem:88968203-528-1Pentanonepentanone-2NSC 5350n-propyl methyl ketonen-C3H7COCH32-Pentanone (natural)Metylopropyloketon [Polish]
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

Evidence from additional scientific databases

EMBL-EBI ChEBI
Exact identifier matchCHEBI:16472

pentan-2-one

A pentanone carrying an oxo substituent at position 2.

Formula
C5H10O
Average mass
86.134 g/mol
Monoisotopic mass
86.07316 Da
Formal charge
0
  • methyl ketone — is a (CHEBI:51867)
  • pentanone — is a (CHEBI:25892)
  • plant metabolite — has role (CHEBI:76924)
  • plant metabolite — has role (CHEBI:76924)
  • methyl ketone — is a (CHEBI:51867)
  • pentanone — is a (CHEBI:25892)
Additional curated names
pentan-2-one2-pentanone2-PentanoneMethyl propyl ketonePentan-2-one
Cross-references from this source
  • CAS: 107-87-9 — NIST Chemistry WebBook
  • CAS: 107-87-9 — KEGG COMPOUND
  • CAS: 107-87-9 — ChemIDplus
  • REGISTRY_NUMBER: 506058 — Reaxys
  • MANUAL_X_REF: C01949 — KEGG COMPOUND
  • MANUAL_X_REF: C01949 — KEGG COMPOUND
  • MANUAL_X_REF: HMDB0034235 — HMDB
  • MANUAL_X_REF: LMFA12000003 — LIPID MAPS
  • MANUAL_X_REF: Pentan-2-one — Wikipedia
  • MANUAL_X_REF: PENTAN-2-ONE — MetaCyc
  • MANUAL_X_REF: PNH — PDBeChem

Mapped by: Exact CAS cross-reference in the ChEBI compound record. Source updated: 2015-10-23. Retrieved: 2026-08-31. Open source record

NIH PubChem PUG-View
Exact identifier match7895

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
  • ERG2024, Guide 127 (Methyl propyl ketone): General First Aid:; · Call 911 or emergency medical service.; · Ensure that medical personnel are aware of the material(s) involved, take precautions to protect themselves and avoid contamination.; · Move victim to fresh air if it can be done safely.; · Administer oxygen if breathing is difficult.; · If victim is not breathing:; -- DO NOT perform mouth-to-mouth resuscitation; the victim may have ingested or inhaled the substance.; -- If equipped and pulse detected, wash face and mouth, then give artificial respiration using a proper respiratory medical device (bag-valve mask, pocket mask equipped with a one-way valve or other device).; -- If no pulse detected or no respiratory medical device available, provide continuous compressions. Conduct a pulse check every two minutes or monitor for any signs of spontaneous respirations.; · Remove and isolate contaminated clothing and shoes.; · For minor skin contact, avoid spreading material on unaffected skin.; · In case of contact with substance, remove immediately by flushing skin or eyes with running water for at least 20 minutes.; · For severe burns, immediate medical attention is required.; · Effects of exposure (inhalation, ingestion, Source: Emergency Response Guidebook (ERG)
  • First Aid: (General first aid procedures); Eye: Irrigate immediately - If this chemical contacts the eyes, immediately wash (irrigate) the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately.; Skin: Water flush - If this chemical contacts the skin, flush the contaminated skin with water. Where there is evidence of skin irritation, get medical attention.; Breathing: Respiratory support; Swallow: Medical attention immediately - If this chemical has been swallowed, get medical attention immediately. Source: The National Institute for Occupational Safety and Health (NIOSH)
  • Note: This chemical does not meet GHS hazard criteria for 0.3% (6 of 1881) of reports. Source: European Chemicals Agency (ECHA)
  • Signal: Danger Source: European Chemicals Agency (ECHA)
  • GHS Hazard Statements: H225 (31.3%): Highly Flammable liquid and vapor [Danger Flammable liquids]; H302 (92.7%): Harmful if swallowed [Warning Acute toxicity, oral]; H319 (91.1%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]; H335 (74.6%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation] Source: European Chemicals Agency (ECHA)
  • Precautionary Statement Codes: P210, P233, P240, P241, P242, P243, P261, P264, P264+P265, P270, P271, P280, P301+P317, P303+P361+P353, P304+P340, P305+P351+P338, P319, P330, P337+P317, P370+P378, P403+P233, P403+P235, P405, 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 1881 reports by companies from 24 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.; Reported as not meeting GHS hazard criteria per 6 of 1881 reports by companies.; There are 23 notifications provided by 1875 of 1881 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)
  • Signal: Danger Source: NITE-CMC
  • GHS Hazard Statements: H225: Highly Flammable liquid and vapor [Danger Flammable liquids]; H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]; H335: May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]; H336: May cause drowsiness or dizziness [Warning Specific target organ toxicity, single exposure; Narcotic effects] Source: NITE-CMC
  • Precautionary Statement Codes: P210, P233, P240, P241, P242, P243, P261, P264+P265, P271, P280, P303+P361+P353, P304+P340, P305+P351+P338, P319, P337+P317, P370+P378, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement) Source: NITE-CMC
  • GHS Hazard Statements: H225: Highly Flammable liquid and vapor [Danger Flammable liquids]; H302: Harmful if swallowed [Warning Acute toxicity, oral]; H305: May be harmful if swallowed and enters airways [Warning Aspiration hazard]; H316: Causes mild skin irritation [Warning Skin corrosion/irritation]; H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]; H331: Toxic if inhaled [Danger Acute toxicity, inhalation]; H333: May be harmful if inhaled [Warning Acute toxicity, inhalation]; H335: May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]; H336: May cause drowsiness or dizziness [Warning Specific target organ toxicity, single exposure; Narcotic effects] Source: NITE-CMC
  • Precautionary Statement Codes: P210, P233, P240, P241, P242, P243, P261, P264, P264+P265, P270, P271, P280, P301+P316, P301+P317, P303+P361+P353, P304+P317, P304+P340, P305+P351+P338, P316, P319, P321, P330, P331, P332+P317, P337+P317, P370+P378, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement) Source: NITE-CMC
  • NFPA Health Rating: 2 - Materials that, under emergency conditions, can cause temporary incapacitation or residual injury. Source: Hazardous Substances Data Bank (HSDB)
  • NFPA Fire Rating: 3 - Liquids and solids that can be ignited under almost all ambient temperature conditions. Materials produce hazardous atmospheres with air under almost all ambient temperatures or, though unaffected by ambient temperatures, are readily ignited under almost all conditions. 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 of 3 was calculated in fish for 2-pentanone(SRC), using a log Kow of 0.91(1) and a regression-derived equation(2). According to a classification scheme(3), this BCF suggests the potential for bioconcentration in aquatic organisms is low(SRC). Source: Hazardous Substances Data Bank (HSDB)
  • Environmental Fate: TERRESTRIAL FATE: Based on a classification scheme(1), an estimated Koc value of 75(SRC), determined from a log Kow of 0.91(2) and a regression-derived equation(3), indicates that 2-pentanone is expected to have high mobility in soil(SRC). Volatilization of 2-pentanone from moist soil surfaces is expected to be an important fate process(SRC) given a Henry's Law constant of 8.36X10-5 atm-cu m/mole(4). 2-Pentanone is expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 35.4 mm Hg(5). 2-Pentanone has been shown to biodegrade under aerobic conditions(6-8). Source: Hazardous Substances Data Bank (HSDB)
  • Environmental Fate: AQUATIC FATE: Based on a classification scheme(1), an estimated Koc value of 75(SRC), determined from a log Kow of 0.91(2) and a regression-derived equation(3), indicates that 2-pentanone is not expected to adsorb to suspended solids and sediment(SRC). Volatilization from water surfaces is expected(3) based upon a Henry's Law constant of 8.36X10-5 atm-cu m/mole(4). Using this Henry's Law constant and an estimation method(3), volatilization half-lives for a model river and model lake are 12 hours and 6.6 days, respectively(SRC). According to a classification scheme(5), an estimated BCF of 3(SRC), from its log Kow(2) and a regression-derived equation(6), suggests the potential for bioconcentration in aquatic organisms is low(SRC). 2-Pentanone is expected to biodegrade in water based on a screening test designed to simulate a polluted river, where the 5 day theoretical BOD for 2-pentanone was 43%(7). 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), 2-pentanone, which has a vapor pressure of 35.4 mm Hg at 25 °C(2), is expected to exist solely as a vapor in the ambient atmosphere. Vapor-phase 2-pentanone 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 3.5 days(SRC), calculated from its rate constant of 4.56X10-12 cu cm/molecule-sec at 25 °C(3). 2-Pentanone contains chromophores that absorb at wavelengths >290 nm and therefore may be susceptible to direct photolysis by sunlight(4). 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.

Inventory details for PENTANONE

INCI name

PENTANONE

Description

2-Pentanone

Record provenance

Inventory reference
95233
Imported identity
PENTANONE
Source update
30/04/2018
European Commission CosIng source notes
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Key data

CAS
107-87-9
EC
203-528-1
Restriction
—
Function
SOLVENT
Dissolving other components of cosmetics. Solvents are usually liquids (aqueous and nonaqueous).

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#20345 · PENTANONE

Ingredients with overlapping formulation functions

PEG/PPG-8/17 COPOLYMERSOLVENT
PEG/PPG-8/55 COPOLYMERCLEANSING, SOLVENT, SURFACTANT - CLEANSING
PENTAFLUOROPROPANEFRAGRANCE, PROPELLANT, SOLVENT
PENTANEPROPELLANT, SOLVENT
PENTYLENE GLYCOLSKIN CONDITIONING, SOLVENT
PERFLUOROCAPRYLYL BROMIDESOLVENT
PERFLUORODECALINDETANGLING, SKIN CONDITIONING, SOLVENT
PERFLUORODIMETHYLCYCLOHEXANESOLVENT

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicalsPubChem PUG RESTEU Safety Gate cosmetic product alertsECHA CHEMUS EPA CompToxCosmetic Ingredient Review safety assessmentsFDA Global Substance Registration SystemILO/WHO International Chemical Safety CardsJapan NITE-CHRIPNIOSH Pocket Guide to Chemical HazardsOECD eChemPortal

How PENTANONE appears in the CosIng inventory

The CosIng inventory lists PENTANONE as a cosmetic ingredient and this page links it to 0 annex records. The inventory entry captures names and identifiers, while the annex records show where the substance is prohibited, restricted or positively listed in EU cosmetics law.

PENTANONE is also tagged with 1 cosmetic function in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

PENTANONE is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Absence of an annex link does not guarantee unrestricted use — always verify against the current official CosIng database before formulating.

According to the EU CosIng inventory, PENTANONE carries the following function designation(s):

CAS 107-87-9 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.
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Source note for PENTANONE

This page reproduces the CosIng inventory entry for PENTANONE from public European Commission cosmetic ingredient materials and shows linked identifiers even when no direct annex match is currently attached.

Use this inventory page to research PENTANONE and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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