METHYL NONYL KETONE
Undecan-2-one
METHYL NONYL KETONE is listed in the EU CosIng inventory, but no direct annex records are linked on this page yet.
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.
Chemical identity and properties
2-Undecanone
Undecan-2-one is a dialkyl ketone with methyl and nonyl as the two alkyl groups. It has a role as a rodenticide and a plant metabolite. It is a dialkyl ketone and a methyl ketone. — ChEBI
- IUPAC name
- undecan-2-one
- Molecular formula
- C11H22O
- Molecular weight
- 170.29 g/mol
- Exact mass
- 170.167065321 Da
- XLogP3
- 4.1
- Topological polar surface area
- 17.1 Ų
- Hydrogen-bond donors
- 0
- Hydrogen-bond acceptors
- 1
- Covalent units
- 1
- Defined stereocentres
- 0
Also known as
16 more reported names
External database identifiers
- ChEBI:CHEBI:17700
- ChEMBL:CHEMBL1236582
- EPA DTXSID:DTXSID2021943
- PubMed:35285579
- PubMed:27633901
- PubMed:22967641
- PubMed:22850984
- PubMed:22619691
- PubMed:22563356
- PubMed:22477025
- PubMed:22438717
- PubMed:22384116
- PubMed:22346620
- PubMed:22289669
- PubMed:22174627
Evidence from additional scientific databases
NIH PubChem PUG-View
Attributed physical-property, hazard, environmental and use annotations.
- Boiling Point: 231.5 °C Source: Hazardous Substances Data Bank (HSDB)
- Boiling Point: BP: 231.5 to 232.5 °C at 761 mm Hg; 99 °C at 7 mm Hg Source: Hazardous Substances Data Bank (HSDB)
- Boiling Point: 231.00 to 232.00 °C. @ 760.00 mm Hg Source: Human Metabolome Database (HMDB)
- Boiling Point: 231-232 °C Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
- Boiling Point: 223 °C @760 [mm Hg] Source: PAC Chemical Database, U.S. Department of Energy
- Color/Form: Oily liquid Source: Hazardous Substances Data Bank (HSDB)
- Color/Form: Colorless liquid Source: Hazardous Substances Data Bank (HSDB)
- Density: 0.8260 to 0.8263 at 20 °C/4 °C Source: Hazardous Substances Data Bank (HSDB)
- Density: 0.822 -0.826 Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
- Density: 0.829 @ 30°C Source: PAC Chemical Database, U.S. Department of Energy
- Flash Point: 192 °F (89 °C) (Closed cup) Source: Hazardous Substances Data Bank (HSDB)
- LogP: log Kow = 4.09 Source: Hazardous Substances Data Bank (HSDB)
- LogP: 4.09 Source: Human Metabolome Database (HMDB)
- Melting Point: 15 °C Source: Hazardous Substances Data Bank (HSDB)
- Melting Point: 15 °C Source: Human Metabolome Database (HMDB)
- Melting Point: 12 °C Source: PAC Chemical Database, U.S. Department of Energy
- Odor: Strong odor Source: Hazardous Substances Data Bank (HSDB)
- Physical Description: Liquid Source: EPA Chemical Data Reporting (CDR)
- Physical Description: Colorless, oily liquid; [HSDB] Colorless liquid; mp = 11-13 deg C; [MSDSonline] Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
- Physical Description: Liquid Source: Human Metabolome Database (HMDB)
- Physical Description: colourless to pale yellow liquid with a citrus, fatty, rue-like odour Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
- Refractive Index: Index of refraction = 1.4291 at 20 °C/D Source: Hazardous Substances Data Bank (HSDB)
- Refractive Index: 1.428-1.432 Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
- Solubility: Insoluble in water. Soluble in ethanol, ether, acetone, benzene, carbon tetrachloride, chloroform. Source: Hazardous Substances Data Bank (HSDB)
- Solubility: soluble in alcohol and oil; insoluble in water Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
- Solubility: 1 ml in 1 ml 95% alcohol (in ethanol) Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
- Vapor Pressure: 0.04 [mmHg] Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
- Vapor Pressure: 4.1X10-2 mm Hg Source: Hazardous Substances Data Bank (HSDB)
- Note: This chemical does not meet GHS hazard criteria for 15.2% (271 of 1781) of reports. Source: European Chemicals Agency (ECHA)
- Signal: Warning Source: European Chemicals Agency (ECHA)
- GHS Hazard Statements: H400 (84.3%): Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard] Source: European Chemicals Agency (ECHA)
- Precautionary Statement Codes: P273, P391, 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 1781 reports by companies from 16 notifications to the ECHA C&L Inventory.; Reported as not meeting GHS hazard criteria per 271 of 1781 reports by companies.; There are 15 notifications provided by 1510 of 1781 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)
- NFPA Health Rating: 1 - Materials that, under emergency conditions, can cause significant irritation. Source: Hazardous Substances Data Bank (HSDB)
- NFPA Fire Rating: 2 - Materials that must be moderately heated or exposed to relatively high ambient temperatures before ignition can occur. Materials would not under normal conditions form hazardous atmospheres with air, but under high ambient temperatures or under moderate heating could release vapor in sufficient quantities to produce hazardous atmospheres with air. 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 28 was calculated for 2-undecanone(SRC), using a log Kow of 4.09(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 280(SRC), determined from a structure estimation method(2), indicates that 2-undecanone is expected to have moderate mobility in soil(SRC). Volatilization of 2-undecanone from moist soil surfaces may be expected to be an important fate process(SRC) given a Henry's Law constant of 6.36X10-5 atm-cu m/mole(3). 2-Undecanone is not expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 4.1X10-2 mm Hg(4). 2-Undecanone had a theoretical biological oxygen demand (BOD) of 1%, 6.5% and 21.8% after 6, 12 and 24 hr, respectively, when incubated with an activated sludge seed at an initial concentration of 500 ppm(5) suggesting that biodegradation in the soil may be fast(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), 2-undecanone, which has a vapor pressure of 4.1X10-2 mm Hg at 25 °C(2), is expected to exist solely as a vapor in the ambient atmosphere. Vapor-phase 2-undecanone 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 1.2 days(SRC), calculated from its rate constant of 1.38X10-11 cu cm/molecule-sec at 25 °C(SRC) that was derived using a structure estimation method(3). Source: Hazardous Substances Data Bank (HSDB)
- Sources/Uses: Used as a solvent in the production of vinyl resins, nitrocellulose, and synthetic rubber; as a flavoring agent; as a dog and cat repellent; [HSDB] Used to make some synthetic essential oils and as a fragrance in soaps, detergents, creams, lotions, and perfumes; [Merck Index] Used as a dog/cat repellent and iris borer deterrent; [Reference #1] Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
- Uses: For methyl nonyl ketone (USEPA/OPP Pesticide Code: 044102) ACTIVE products with label matches. /SRP: Registered for use in the U.S. but approved pesticide uses may change periodically and so federal, state and local authorities must be consulted for currently approved uses./ Source: Hazardous Substances Data Bank (HSDB)
- Uses: Used as a solvent in the production of vinyl resins, nitrocellulose, and synthetic rubber. Source: Hazardous Substances Data Bank (HSDB)
- Uses: ... Flavoring Source: Hazardous Substances Data Bank (HSDB)
- Uses: Dog and cat repellent/training aid and iris borer deterrent. Source: Hazardous Substances Data Bank (HSDB)
- Uses: Perfumery, flavoring, animal repellent. 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
| Source | Result | Checked |
|---|---|---|
| NIH PubChem PUG-View | Exact match | 2026-08-31 |
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 METHYL NONYL KETONE
INCI name
METHYL NONYL KETONE
Description
Undecan-2-one
Record provenance
- Inventory reference
- 40739
- Imported identity
- METHYL NONYL KETONE
- Source update
- 02/03/2011
Annex records for METHYL NONYL KETONE
Key data
Related inventory evidence
Ingredients with overlapping formulation functions
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
How METHYL NONYL KETONE appears in the CosIng inventory
The CosIng inventory lists METHYL NONYL KETONE 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.
METHYL NONYL KETONE 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
Source note for METHYL NONYL KETONE
This page reproduces the CosIng inventory entry for METHYL NONYL KETONE 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 METHYL NONYL KETONE 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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