English name: Undecylenic acid;
English synonyms: 10-Undecenoic acid; undec-10-enoate; undec-10-enoic acid;
EINECS: 203-965-8
Molecular formula: C11H20O2
Molecular weight: 184.2753
CAS number: 112-38-9
MDL number: MFCD00004442
EINECS number: 203-965-8
RTECS number: YQ2975000
BRN number: 1762631
Physical and chemical properties
Appearance: Colorless or light yellow liquid with a special odor
Density (g/mL, 25℃): 0.9072
Relative density (20℃, 4℃): 0.907224
Melting point (ºC): 24.5
Boiling point (ºC, at atmospheric pressure): 275
Refractive index (n20): 1.447225
Refractive index (n25D): 1.4464
Flash point (ºC): 148
Refractive index (n25): 1.445730
Solubility: Nearly insoluble in water, but soluble in organic solvents such as ethanol, ether, and chloroform.
Safety Information
Dangerous Goods Code: UN 3261 8/ PG 2
Safety Identification: S26 S61 S37/S39 S36
Hazard Identification: R36/37/38 R52/53 R36/38
Toxicological Data
Main Irritant Effects:
On the skin: irritates skin and mucous membranes. In the eyes: irritation effects.
Sensitization: No known sensitization effects.
Nature and Stability
1. Avoid contact with strong oxidizers.
2. This product is of low toxicity and has slight irritant properties. Operators should wear protective equipment.
3. Present in flue gas.
Raw Material Workshop
Q: What is undecylenic acid? What is its main use?
A: Undecylenic acid is an important organic compound. Its main use is as a key raw material for synthesizing fragrances (such as musk ketone, various lactones, etc.), and it is also used in the production of antibiotics and medications for treating skin fungal infections.
Q: What can undecylenic acid specifically produce in the fragrance industry?
A: It is a basic raw material for synthesizing various high-grade fragrances, such as γ-undecalactone (peach scent), polycyclic fifteen lactones (musk scent), musk ketone, nonanal (rose and citrus scents), as well as nonanol and others.
Q: Does undecenoic acid have medical uses?
A: Yes. Undecenoic acid and its derivatives, such as zinc salts, possess antifungal properties and are often used as raw materials to produce topical medications for treating athlete's foot, ringworm, and other skin fungal diseases.
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