Skip to main content
CosIng Checker
CosIng Checker
EU cosmetic ingredients, restrictions and safety
Login
CAS 0 records

CAS 112-12-9

CAS 112-12-9 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

Check this CAS numberBrowse annexes

Chemical identity and properties

PubChem 2D chemical structure for CAS 112-12-9
CAS 112-12-9PubChem CID 8163

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

Methyl nonyl ketone2-HendecanoneRue ketoneMETHYL N-NONYL KETONEKetone, methyl nonylNonyl methyl ketoneMGK Dog and Cat RepellentFEMA No. 3093
16 more reported names
YV5DSO8CY9NSC-4028CHEBI:17700RefChem:89515203-937-5UNDECANONE2-OxoundecaneMethylnonylketoneUndecanone-(2)Methyl-n-nonylketoneMgk dog & cat repellentNSC4028Caswell No. 573O2-Undecanone (natural)BioUDHSDB 7431
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

Evidence from additional scientific databases

NIH PubChem PUG-View
Exact identifier match8163

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

  • 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)

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
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.

Records for CAS 112-12-9

0 total
No records found for this CAS number.

How CAS 112-12-9 is used on this site

CAS 112-12-9 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 112-12-9 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.