All Photos(4)



Caffeic acid

≥98.0% (HPLC)

3,4-Dihydroxybenzeneacrylic acid, 3,4-Dihydroxycinnamic acid, 3-(3,4-Dihydroxyphenyl)-2-propenoic acid
Linear Formula:
CAS Number:
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PubChem Substance ID:


≥98.0% (HPLC)




211-213 °C (dec.) (lit.)


ethanol: 50 mg/mL

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InChI key


Gene Information

human ... ELA2(1991)
rat ... Alox5(25290)

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General description

Caffeic acid exists in its free and ester form. It is considered as the predominant polyphenol, contributing to the hydroxycinnamic acid content in various fruits. Coffee is one of the major source of caffeic acid.


Caffeic acid has been used as a standard of phenolic acid in the study to determine the total phenolic acid content in vegetables after subjecting to alkaline and acid hydrolysis. It has also been used to determine its antioxidant activity by various assay methods.


2, 5, 25 g in poly bottle

Biochem/physiol Actions

A natural dietary phenolic compound found in plants that is an anti-oxidant. Inhibits the synthesis of leukotrienes that are involved in immunoregulation, inflammation and allergy. Inhibits Cu2+-induced LDL oxidation.
Caffeic acid and other polyphenols are metabolized by going through enzyme catalysed methyl transfer, sulfation and glucuronic acid addition. It non-competitively prevents the action of 5-lipoxygenase. Caffeic acid ready undergoes hydrolysis in alkaline conditions.

Features and Benefits

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Health hazard

Signal Word


Hazard Statements

Hazard Classifications

Carc. 2

Storage Class Code

11 - Combustible Solids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

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Certificate of Origin

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Phenolic acids in potatoes, vegetables, and some of their products
Mattila P and Hellstrom J
J. Food Compos. Anal., 20(3-4), 152-160 (2007)
Vassiliki T Papoti et al.
Foods (Basel, Switzerland), 7(12) (2018-12-06)
Quality characteristics of olive products significantly depend on cultivar (cv), among other factors. In this study, seven traditional, noncommercial Greek cultivars, along with the commercial Spanish Arbequina cv., were examined for the phenolic antioxidant dynamic of their leaves. Polar extracts
Caffeic acid is a selective inhibitor for leukotriene biosynthesis
Yasuko K, et al.
Biochimica et Biophysica Acta, Lipids and Lipid Metabolism, 792(1), 92-97 (1984)
Polyphenols: food sources and bioavailability
Manach C, et al.
American Journal of Clinical Nutrition, 79(5), 727-747 (2004)
Comparing antioxidative food additives and secondary plant products-use of different assays
Kranl K, et al.
Food Chemistry, 93(1), 171-175 (2005)


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