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Cinnamic aldehyde

Cinnamaldehyde(CAS No. 104-55-2) is an oily yellow liquid at room temperature with a cinnamon odor and sweet taste. Cinnamaldehyde is mainly obtained from the steam distillation of the oil of cinnamon bark and it also can be made synthetically. 

Cinnamaldehyde is mainly used as a flavoring agent in liquid refreshments, ice-creams, chewing gums and candy. It is also used in perfumes to recreate the magic of fruity and interesting fragrance ranges. What's more, it can be used to prevent corrosion in steel and other ferrous alloys in corrosive fluids like hydrochloric acid.

Cinnamaldehyde can be found in a number of food items such as sour cherry, horseradish, and sea-buckthornberry. And it can be found primarily in feces, as well as in human neuron and skin tissues. it exists in all eukaryotes, ranging from yeast to humans.


Name: Cinnamaldehyde

Other names: 3-Phenyl-2-propenal; Cinnamic aldehyde; trans-Cinnamaldehyde

CAS No.: 104-55-2

Chemical formula: C9H8O

Molecular weight: 132.16

Boiling Point: 249.00 to 252.00 °C. @ 760.00 mm Hg

Density: 1.046-1.052

Refractive index: 1.619-1.623

Flash point: 71ºC

Purity: 99%

Appearance: Yellow liquid, smell sweet

Stability: Stable, Combustible, Incompatible with strong oxidizing agents, strong bases.

Solubility: Soluble in ethanol, propylene glycol and non-volatile oil, insoluble in glycerin and water. Avoid touch with skin and eyes when using.

Storage: Keep the container closed and store in a dry, well-ventilated place.

Reactivity Profile: Cinnamaldehyde is incompatible with strong oxidizing agents and strong bases.

Fire Hazard: Cinnamaldehyde is combustible.



Cinnamaldehyde is the aldehyde that gives cinnamon its flavor and odor. 

Cinnamaldehyde occurs naturally in the bark of cinnamon trees and other species of the genus Cinnamomum like camphor and cassia. These trees are the natural source of cinnamon, and the essential oil of cinnamon bark is about 90% cinnamaldehyde. 

Cinnamaldehyde is also used as a fungicide. Proven effective on over 40 different crops, cinnamaldehyde is typically applied to the root systems of plants. Its low toxicity and well-known properties make it ideal for agriculture. To a lesser extent, cinnamaldehyde is an effective insecticide, and its scent is also known to repel animals like cats and dogs. 

Cinnamaldehyde is also known as a corrosion inhibitor for steel and other ferrous alloys in corrosive fluids. It can be used in combination with additional components such as dispersing agents, solvents and other surfactants. Concentrated cinnamaldehyde is a skin irritant, and the chemical is toxic in large doses, but no agencies suspect the compound is a carcinogen or poses a long-term health hazard. Most cinnamaldehyde is excreted in urine as cinnamic acid, an oxidized form of cinnamaldehyde.