Undecylenic acid zinc, a white amorphous powder chemical. Anionic surfactant. Mainly used as an emulsifier in creams and lotions. It has good emulsifying and bactericidal properties and can also be used as a bactericide in various cosmetics and soaps, with a usage range of 5%-15%. It is also used in ointments for burns and in treatments for conditions like tinea pedis, tinea corporis, tinea cruris, and tinea manuum, with undecylenic acid zinc compound ointment being primarily antifungal, inhibiting the growth and reproduction of fungi, with a usage range of 15%-25%, used in conjunction with undecylenic acid.
Compound Introduction
Basic Information
English Name: Zinc Undecylenate
English Alias: Zinc Undecylenate
CAS Number: 557-08-4
Molecular Formula: C22H38O4Zn
Molecular Weight: 431.91500
Exact Mass: 430.20600
PSA: 52.60000
LogP: 6.59890
Physical Properties
Appearance and Characteristics: White powder
Density: 1.63
Melting Point: 118-121°C
Boiling Point: 300.8°C
Flash Point: 145.8°C
Chemical Properties
Decomposes into undecylenic acid and corresponding zinc salts when encountering strong acids.
Production Method
Primarily uses the double decomposition method. Undecylenic acid is used as the raw material, first undergoing saponification reaction with sodium hydroxide solution, then a double decomposition reaction with zinc sulfate, and finally obtained through washing, centrifugal dehydration, and drying.
Annual Production：200 tons
Product Validity：24 monthsProduct
Packaging Specifications：20kg/cardboard barrel, 10kg/cardboard barrel
Application： in Ointments and Functional CosmeticsHas antibacterial properties, with dandruff-reducing and itch-relieving effects, low irritancy, and high safety.
Raw Material Workshop
Q: What is the main role of zinc undecylenate in cosmetics? Is it safe?
A: Zinc undecylenate mainly plays two core roles in cosmetics: emulsifier and antiseptic. It helps products like creams form a stable and fine texture, while effectively inhibiting the growth of bacteria and fungi, enhancing the safety of the products. Its usage concentration is usually between 5% and 15%, and it is safe to add within this range as per regulations.
Q: What is the dosage of zinc undecylenate when used as an antifungal? Why is it often paired with undecylenic acid?
A: When used in compounded ointments for the treatment of tinea (such as athlete's foot, jock itch) or burn medications, zinc undecylenate serves as an antifungal agent with a higher effective usage range, typically between 15%-25%. Its combination with undecylenic acid produces a synergistic effect, jointly inhibiting and killing fungi, enhancing efficacy, making it a classic combination in many topical antifungal medications.
Q: What type of raw material is zinc undecylenate? Is it suitable for all cosmetics?
A: Zinc undecylenate is an anionic surfactant. It is mainly suitable for products that require emulsification systems and antibacterial effects, such as creams, lotions, and soaps. However, due to its specific chemical properties and sterilizing function, it is not recommended to be used in other types of products (such as purely hydrating serums) or in products that require different emulsification systems without necessity. It should be used according to the design and needs of the product formula.
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