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hexyl cinnamate

Hexyl cinnamate is an ester compound recognized for its balsamic, woody scent, used primarily in fragrance applications as a cypress oil substitute.
Chemical Structure

General Material Description

Hexyl cinnamate is an ester compound chemically described as hexyl (2E)-3-phenyl-2-butenoate with the molecular formula C15H20O2. It appears as a colorless to pale yellow liquid and is primarily valued for its balsamic odor characterized by woody and powdery notes. Common synonyms include hexyl (E)-3-phenylprop-2-enoate and cinnamic acid hexyl ester. This compound belongs to the class of cinnamic acid esters and is linked to the PubChem compound database under CID 6437300. Hexyl cinnamate is typically synthesized via esterification of cinnamic acid with hexanol and is sourced for its use in fragrance formulations, especially as a component imparting balsamic and woody aromas.

Occurrence, Applicability & Potential Uses

Hexyl cinnamate occurs naturally in certain plant extracts and is extensively utilized in the fragrance industry for its balsamic, woody aromatic qualities. Its scent profile includes resembling cypress oil, making it a preferred replacement in formulations requiring similar olfactory characteristics. This fragrance agent is incorporated into products requiring powdery and sap-like nuances and contributes dry woody notes. The compound’s use is regulated under IFRA (Global), which recommends usage limits of up to 3.0% in fragrance concentrates. It is not approved for flavoring purposes, aligning with safety assessments across various regulatory frameworks including REACH (EU).

Physico-Chemical Properties Summary

Hexyl cinnamate exhibits a specific gravity of approximately 0.997 at 25 °C, indicative of a near neutral density compared to water. Its vapor pressure is extremely low at 0.000126 mmHg at 25 °C, suggesting low volatility at ambient temperatures. The estimated log P value of 4.833 reflects a high lipophilicity, consistent with its limited water solubility and good solubility in alcohol solvents, facilitating incorporation in oil-based fragrance systems. The flash point, measured at 354 °F (179 °C), indicates considerable thermal stability and helps inform safe handling practices. These physicochemical parameters assist formulators in predicting the material’s behavior in various fragrance matrices and ensure compatibility and stability in end products.

FAQ

What is hexyl cinnamate and what are its main characteristics?
Hexyl cinnamate is an ester compound derived from cinnamic acid and hexanol, known chemically as hexyl (2E)-3-phenyl-2-butenoate. It possesses a balsamic, woody odor with powder and sap-like nuances. This colorless to pale yellow liquid is primarily used as a fragrance ingredient, valued for its ability to impart cypress-like and dry woody scents in perfumery and related applications.
How is hexyl cinnamate used and where does it typically occur?
Hexyl cinnamate appears naturally in certain botanical extracts but is most commonly industrially synthesized for use in fragrance products. Its aroma profile makes it suitable as a replacement for natural cypress oil in formulations. It is used to add balsamic, woody, powdery, and sap-like notes in perfumes, cosmetics, and personal care items. It dissolves well in alcoholic solvents and is favored for oil-based fragrance systems.
What regulations and safety considerations apply to hexyl cinnamate?
Hexyl cinnamate is regulated by IFRA (International Fragrance Association, Global), which recommends usage limits up to 3.0% in fragrance concentrates to ensure safe use. It is not authorized for use as a flavoring agent. Under the European REACH regulation, it is registered and monitored for industrial and commercial safety. No specific hazard classifications have been identified under OSHA standards. Safety data indicates no notable oral, dermal, or inhalation toxicity has been conclusively determined.

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Other Information

General Material Information

Preferred name hexyl cinnamate
Trivial Name Hexyl cinnamate
Short Description hexyl (2E)-3-phenyl-2-butenoate
Formula C15 H20 O2
CAS Number 3488-00-4
ECHA Number 222-479-7
FDA UNII 532UJ0Y6RI
Nikkaji Number J216.149D
NMR Predictor External link
Synonyms
  • hexyl (2E)-3-phenyl-2-butenoate
  • hexyl (2E)-3-phenylacrylate
  • hexyl (2E)-3-phenylprop-2-enoate
  • hexyl (E)-3-phenyl prop-2-enoate
  • hexyl (E)-3-phenyl-2-butenoate
  • hexyl (E)-3-phenylprop-2-enoate
  • 2-propenoic acid, 3-phenyl-, hexyl ester, (2E)-
  • 2-Propenoic acid, 3-phenyl-, hexyl ester
  • Cinnamic acid, hexyl ester
  • n-Hexyl cinnamate

PhysChem Properties

Material listed in food chemical codex No
Molecular weight 232.32279968262
Specific gravity @ 25 °C
Pounds per Gallon
Vapor Pressure 0.000126 mmHg @ 25 °C
Flash Point TCC Value 178.89 °C TCC
logP (o/w) 4.833 est
Solubility
alcohol Yes
water, 2.296 mg/L @ 25 °C (est) Yes
water No

Organoleptic Properties

Odor Type: Balsamic
cypress, cumin, fruity, balsamic
Luebke, William tgsc, (1993) At 100.00 %. cypress cuminic acetate fruity balsam

Potential Uses

Applications
Odor purposes Balsam , Cypress oil replacer , Powder , Sap , Woody
Other purposes Dry

Safety Information

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 hexyl cinnamate usage levels up to:
3.0000 % in the fragrance concentrate.
Recommendation for hexyl cinnamate 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 :6437300
National Institute of Allergy and Infectious Diseases:Data
hexyl (E)-3-phenylprop-2-enoate
Chemidplus:0003488004