2-nonanone oxime

2-nonanone oxime is an organic compound classified as an oxime of methyl heptyl ketone. It appears as a colorless or pale liquid with a molecular formula of C₉H₁₉NO and a molecular weight of approximately 157.26 g/mol. The compound features a fresh, green odor reminiscent of cucumber and floral notes, making it useful in fragrance applications. Known also by synonyms such as N-hydroxynonan-2-imine and methyl heptyl ketone oxime, it is structurally related to ketone oximes commonly utilized for their odoractive properties. 2-nonanone oxime can be sourced or derived synthetically for use in perfumery and related industries. More detailed chemical data can be found via [PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/58526736).

This compound occurs naturally at low concentrations in certain plant extracts, such as champaca concrete at approximately 0.01%, contributing green floral notes. 2-nonanone oxime is primarily applicable in fragrance formulations, imparting crisp and fresh odor profiles that resemble cucumber and floral scents. It is recognized for its use as a fragrance agent under the IFRA Code of Practice (Global), which sets guidance on safe usage levels. Although a fragrance material, 2-nonanone oxime is not recommended for flavor use according to current standards. Its distinctive sensory properties make it suitable for various personal care and household product applications within fragrance design.

2-nonanone oxime exhibits physicochemical properties notable for fragrance formulation. It has a relatively high estimated logP value of approximately 3.3, indicating moderate hydrophobicity and suggesting good solubility in alcohol-based solvents but limited water solubility (around 20.17 mg/L at 25 °C, estimated). Its vapor pressure is low at 0.009 mmHg at 25 °C, reflecting low volatility under ambient conditions. The flash point is high, about 283 °F (approximately 139 °C), signifying thermal stability in typical use scenarios. These characteristics influence its behavior in product matrices, favoring controlled release and persistence of its green odor characteristic in fragrance applications.

(IUPAC):	Atomic Weights of the Elements 2011 (pdf)
Videos:	The Periodic Table of Videos
tgsc:	Atomic Weights use for this web site
(IUPAC):	Periodic Table of the Elements
HMDB (The Human Metabolome Database):	Search
Typical G.C.
VCF-Online:	VCF Volatile Compounds in Food
ChemSpider:	View

Safety information

Hazards identification
Classification of the substance or mixture
GHS Classification in accordance with 29 CFR 1910 (OSHA HCS)
None found.
GHS Label elements, including precautionary statements
Pictogram
Hazard statement(s)
None found.
Precautionary statement(s)
None found.
Oral/Parenteral Toxicity:
Not determined
Dermal Toxicity:
Not determined
Inhalation Toxicity:
Not determined

Safety in use information

Category:
fragrance agents
RIFM Fragrance Material Safety Assessment: Search
IFRA Code of Practice Notification of the 49th Amendment to the IFRA Code of Practice
Recommendation for 2-nonanone oxime flavor usage levels up to:
	not for flavor use.

Safety references

EPI System: View

AIDS Citations:Search

Cancer Citations:Search

Toxicology Citations:Search

EPA ACToR:Toxicology Data

EPA Substance Registry Services (SRS):Registry

Laboratory Chemical Safety Summary :58526736

National Institute of Allergy and Infectious Diseases:Data

N-hydroxynonan-2-imine