Basic Information
Standard Name: 10 undecylenic acid
Abbreviation: undecylenic acid
English name: 10 Undecenonic acid/Undecylenic acid
Molecular formula: C11H20O2
Molecular weight: 184.28EINECS：203-965-8
MDL：MFCD00004442
Physical and chemical properties
Appearance: Colorless to pale yellow transparent oily liquid at room temperature; Solidification into white crystals at temperatures below 23-25 ℃; Characterized by a light fruity aroma.
Melting point: 23-25 ℃
Boiling point: 275 ℃ (atmospheric pressure); 137 ℃/0.27 kPa (reduced pressure)
Density (25 ℃): 0.907~0.912 g/mL
Flash point: 148 ℃
Solubility: Almost insoluble in water; Easy to dissolve in organic solvents such as ethanol, ether, acetone, mineral oil, etc
Chemical properties: The molecular end contains carbon carbon double bonds and carboxyl groups, which can undergo addition, polymerization, and esterification reactions; Has natural antifungal activity.
General Quality Indicators (Industrial/Pharmaceutical Grade)
Industrial Grade
Content ≥ 95.0%Freezing point ≥ 21 ℃
Moisture content ≤ 0.2%
Acid value: 298~308 mgKOH/g
Pharmaceutical/Pharmacopoeia Grade (USP Standard)
Content ≥ 97.0%
Freezing point ≥ 23 ℃
Strictly control heavy metals and burning residues; No harmful impurities
Main uses
1) In the pharmaceutical field (one of the core applications), it has a significant inhibitory effect on skin fungi and is a classic external antifungal raw material: Prepare ointments, solutions, and sprays for fungal infections such as athlete's foot (athlete's foot), tinea pedis, and tinea capitis; Can synthesize zinc undecylenate (a commonly used ingredient in compound fungal drugs).
2) Important long-chain unsaturated fatty acid spice intermediates for spice synthesis (maximum industrial use):Preparation of γ - undecanolactone (peach aldehyde) (the core flavor of honey peach essence);
Synthesis of cyclopentadecanolide, musk flavor, nonaldehyde, nonanol and other daily chemical essence raw materials.
3) Fine chemical raw materials
Production of surfactants and unsaturated polyester modified monomers;
Lubricant additives, plastic modification agents;
Organic synthesis intermediates.
4) Cosmetics/personal care products are added in compliance with regulations and used as antibacterial functional raw materials. 4、
Key points for safety and storage
Hazard: Irritating substances (Xi) that can irritate the skin and eyes; Harmful to aquatic organisms; Avoid contact with strong oxidants and strong alkalis; Double bonds are prone to oxidation and discoloration under long-term light exposure;Storage: Store in a cool and dark place, sealed and stored at room temperature; Not classified as bulk general cargo transportation of hazardous chemicals.
The mainstream industrial route for preparation is high-temperature cracking of castor oil methyl ester, which produces heptanal as a byproduct and is a renewable oil derived chemical.
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