Octyl 4-methoxycinnamate (OMC) is a commonly used sunscreen, anti-aging agent and ultraviolet absorber, with a CAS number of 5466-77-3. The molecular formula is C18H26O3 and the molecular weight is 290.4. Chinese synonyms include 4-Methoxycinnamic Acid octyl Ester, 4-methoxycinnamic acid isooctyl ester, etc. English synonyms include Isooctyl-4-methoxycinnamate, 2-ethylhexyl-p-methoxycinnamate, Octyl-methoxycinnamate (OMC), etc.
The Octyl 4-methoxycinnamate molecule contains a conjugated large π bond. This conjugated structure determines that the substance has the property of absorbing ultraviolet rays, capable of absorbing ultraviolet rays within the wavelength range of 280-310nm, with the maximum absorption at 311nm, effectively preventing UVB damage to the skin.
The core advantage of Octyl 4-methoxycinnamate
1. Octyl-methoxycinnamate (OMC) sunscreen is highly targeted and mainly focuses on UVB protection. OMC has a strong absorption peak around 311nm and can effectively resist the key band that causes skin redness and sunburn.
2. Octyl 4-methoxycinnamate has excellent compatibility and can be compounded with physical sunscreens such as zinc oxide and titanium dioxide, or chemical sunscreens such as oxalilin, without affecting the stability of the product.
3. Isooctyl-4-methoxycinnamate has a skin-friendly feel, is in liquid form and easily soluble in organic solvents. When added to sunscreen, octyl methoxycinnamate will not cause heaviness or whitening problems, and is suitable for refreshing formulas.
4. With high cost performance, mature production technology and moderate raw material prices, octyl 4-methoxycinnamate is a common choice for affordable to mid-to-high-end sunscreen products.
5. Octyl 4-methoxycinnamate has excellent stability and is not prone to decomposition under normal storage and usage conditions, ensuring the durability of the sun protection effect.
What are the uses of Octyl 4-methoxycinnamate?
The core application of octyl methoxycinnamate (CAS 5466-77-3) is related to ultraviolet protection, covering fields such as cosmetics and industrial materials, as follows:
Main uses: Cosmetics field (core scenarios-octyl methoxycinnamate for skin)
The core sun protection ingredient of sunscreen is compatible with various sun protection products such as lotion, cream, spray and gel. Octyl 4-methoxycinnamate focuses on UVB protection to prevent the skin from getting red, sunburned and tanned.
Adding daily skin care products such as toner, essence and lotion not only has the functions of sun protection and anti-aging, but also reduces the photodamage of ultraviolet rays to the skin.
Special skin care product raw materials, isooctyl-4-methoxycinnamate used in skin care products for the auxiliary treatment of photosensitive dermatitis, to relieve skin sensitivity caused by ultraviolet rays.
Secondary uses: Industry and other fields
Anti-aging agents and ultraviolet absorbers for plastic and resin materials, delaying the aging, yellowing and embrittlement of plastic products caused by ultraviolet radiation.
Ink and coating additives enhance the weather resistance of products, prevent fading and deterioration after sun exposure, and extend their service life.
When used in combination with other sunscreens, octyl methoxycinnamate uses can meet different protection needs and expand the ultraviolet protection range of the product (such as when combined with UVA absorbers).
Octyl 4-methoxycinnamate has excellent stability and is not prone to decomposition when stored at room temperature and away from light. Its structure remains stable within the pH range (5.5-7.5) of common cosmetics. The octyl methoxycinnamate safe is controllable. Octyl-methoxycinnamate (OMC) has been approved by regulatory authorities in many countries for use in cosmetics. When used in compliance with regulations, it is gentle on the skin of most people.
Post time: Oct-29-2025