Cinnamic Acid

Basic Information

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CAS Number

621-82-9

Molecular Formula

C9H8O2

Molecular Weight

148.16 g/mol

Chemical Classification

Basic Chemical Raw Materials Organic Chemicals Carboxylic Acids

Fine Chemicals Dyes and Pigments Organic Dyes

Basic Physical Properties

Melting Point

133 ºC

Boiling Point

265°C at 760 mmHg

Density

1.2475

Flash Point

>230 °F

Solubility

0.00 M

Refractive Index

1.5049 (estimate)

Vapor Pressure

3.21e-05 mmHg

SMILES

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OC(=O)C=Cc1ccccc1

InChI

InChI=1S/C9H8O2/c10-9(11)7-6-8-4-2-1-3-5-8/h1-7H,(H,10,11)

InChIKey

WBYWAXJHAXSJNI-UHFFFAOYSA-N

LogP

1.7844

pKa

pK (25°) 4.46

Topological Polar Surface Area

37.3 Å²

Hydrogen Bond Donor/Acceptor

1 / 2

Complexity

155

Safety Information

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Hazard Statement

H315 Causes skin irritation
Skin corrosion/irritation

H319 Causes serious eye irritation
Serious eye damage/eye irritation

H335 May cause respiratory irritation
Specific target organ toxicity, single exposure; Respiratory tract irritation

Stability

Stable. Combustible. Incompatible with strong oxidizing agents.

Toxicity

LD50 (g/kg): 3.57 orally in rats; >5.0 dermally in rabbits (Letizia)

Synonyms & References

English

Cinnamic Acid
Cinnamic Acid,mixture of cis and trans
2-Propenoicacid, 3-phenyl-
3-Phenylacrylic acid
trans-Cinnamic acid
3-Phenylpropenoic acid
Phenylacrylic acid
(E)-Cinnamic acid
trans-3-Phenylacrylic acid
Zimtsaeure
(2E)-3-phenylprop-2-enoic acid
(E)-3-phenylprop-2-enoic acid
3-phenylprop-2-enoic acid
E-Cinnamic Acid
trans-beta-Carboxystyrene
trans-Cinnamate
(E)-3-Phenyl-2-propenoic acid
(E)-cinnamate
Benzeneacrylic acid
trans-3-Phenyl-2-propenoic acid
Benzenepropenoic acid
Cinnamylic acid
Cinnamic acid, (E)-
3-Phenyl-2-propenoic acid
2-Pr

MDL Number

MFCD00004369

FAQ

What is Cinnamic Acid (CAS: 621-82-9)?

Cinnamic Acid is an aromatic carboxylic acid with the chemical formula C9H10O2. It is a white crystalline solid with a mild, pleasant odor. Commonly found in nature, it is used in various industries due to its versatile chemical properties and bioactive characteristics.

What are the main uses of Cinnamic Acid (CAS: 621-82-9)?

Cinnamic Acid is widely used in pharmaceuticals as a precursor for drugs and as an antioxidant. It also serves as a flavoring agent in food products and is applied in the cosmetic industry for its fragrance and skin benefits. In research, it is used for studying biological activities and as a model compound for organic synthesis.

Is Cinnamic Acid (CAS: 621-82-9) safe?

Cinnamic Acid is generally considered safe when used in appropriate amounts, but it should be handled with care. It has low toxicity, but prolonged exposure may cause skin irritation. Safety standards recommend using protective gloves and goggles when working with it, and following standard chemical handling practices for lab and industrial use.

How should Cinnamic Acid (CAS: 621-82-9) be stored?

Cinnamic Acid should be stored in a cool, dry, and dark place, ideally at temperatures below 25°C. It is sensitive to moisture and light, so it should be kept in a sealed container and away from direct sunlight. Proper storage ensures its stability and prolongs shelf life for both industrial and research purposes.