Ethylhexyl methoxycinnamate
CAS Number
5466-77-3
EC Number
226-775-7
Abbreviation
OMC
What is Ethylhexyl methoxycinnamate?
Ethylhexyl methoxycinnamate (CAS 5466-77-3), commonly abbreviated as OMC, is a UV-B absorbing ester used as the active sunscreen ingredient in cosmetic and personal care formulations.
Where is Ethylhexyl methoxycinnamate used?
- Sunscreen lotions and SPF-rated moisturizers: primary UV filter
- Daily-wear foundations: broad UV-B protection at 2–10%
- Hair care: leave-on conditioners and styling products that prevent UV-induced color fade and protein degradation in hair fibers
- Lip care: SPF lip balms and glosses for photostability in thin-film applications
- Pharmaceutical topical preparations use it to protect active ingredients from photodegradation during shelf life.
Good to know: It absorbs ultraviolet radiation in the 280–320 nm range, protecting both the skin and the stability of light-sensitive formulations. It meets the regulatory concentration limits set by the EU Cosmetics Regulation, FDA OTC monograph, and other major markets.
Commercial specifications
- Bulk supply in drums and IBCs
Other Names (Synonyms)
2-ethylhexyl 4-methoxycinnamate|2-ethylhexyl (E)-3-(4-methoxyphenyl)prop-2-enoate|Octinoxate|OMC
What are the physical properties of Ethylhexyl methoxycinnamate?
Melting Point <-25°C
Boiling Point 140-150 °C @ Press: 0.076 Torr
Density 1.009
Flash Point 193°C
Appearance colourless or pale yellow liquid
Color Clear colorless to yellow
Odor Odorless
Form Liquid
Water Solubility <0.1 g/100 mL at 27 ºC
Refractive Index 1.543-1.547
Log P 5.921 (est)
How is Ethylhexyl methoxycinnamate classified and handled safely? Learn More
Warning
GHS07· Irritant GHS09· Environmental Hazard
Hazard Statements
H315 Causes skin irritation
H319 Causes serious eye irritation
H335 May cause respiratory irritation
H411 Toxic to aquatic life with long lasting effects
Precautionary Statements
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P271 Use only outdoors or in a well-ventilated area.
P273 Avoid release to the environment.
Which trade and regulatory codes apply to Ethylhexyl methoxycinnamate?
HS Code 29189090
Storage Class 10 - Combustible liquids
WGK (Germany) nwg