Cinnamic acid
CAS 140-10-3
EC 205-398-1
Formula C9H8O2
MW 148.16 g/mol
Organic Acids Personal Care & CosmeticsPharmaceuticals & HealthcarePrinting & PackagingPlastics & Polymers UV Protection & StabilizationFlavoring & AcidulantpH Regulation & Buffering
Description
Cinnamic acid (CAS 140-10-3) is a naturally occurring organic acid derived from cinnamon oil, also identified as phenylacrylic acid or trans-cinnamate. It carries EC number 205-398-1 and molecular formula C9H8O2. No E-code designation applies to this substance.
In UV-protective cosmetic formulations, cinnamic acid acts as a chromophore that absorbs ultraviolet radiation, reducing photodegradation of skin and active ingredients. Pharmaceutical manufacturers use it as a pH buffer and skin-conditioning agent in topical preparations. In polymer processing, it functions as a light stabilizer, slowing UV-induced chain scission in packaging materials.
Cinnamic acid is supplied as a crystalline powder meeting Ph.Eur. and FCC grade specifications, supporting use across pharmaceutical and food-contact applications. The substance is registered under REACH and classifiable under HS code 29163900. Standard packaging formats for B2B supply include 25 kg fiber drums and bulk quantities on request.
In UV-protective cosmetic formulations, cinnamic acid acts as a chromophore that absorbs ultraviolet radiation, reducing photodegradation of skin and active ingredients. Pharmaceutical manufacturers use it as a pH buffer and skin-conditioning agent in topical preparations. In polymer processing, it functions as a light stabilizer, slowing UV-induced chain scission in packaging materials.
Cinnamic acid is supplied as a crystalline powder meeting Ph.Eur. and FCC grade specifications, supporting use across pharmaceutical and food-contact applications. The substance is registered under REACH and classifiable under HS code 29163900. Standard packaging formats for B2B supply include 25 kg fiber drums and bulk quantities on request.
Physical Properties
| Melting Point | 133 °C |
| Boiling Point | 300 °C |
| Density | 1.248 |
| Flash Point | >230 °F |
| Appearance | White to almost white crystalline powder |
| Color | White to almost white |
| Odor | Faint odour |
| Form | Crystalline Powder |
| Water Solubility | 0.4 g/L (20 ºC) |
| Vapor Pressure | 1.3 hPa (128 °C) |
| Refractive Index | 1.5049 (estimate) |
| pH | 3-4 (0.4g/l, H2O, 20℃) |
| Log P | 2.130 |
Safety & Handling (Learn More)
Warning GHS07
H
H315H319H335
P
P261P264P271P280P319P321P405P501P264+P265P302+P352P304+P340P332+P317P337+P317P362+P364P403+P233P305+P351+P338
Trade & Regulatory
| HS Code | 29163900 |
| Storage Class | 13 - Non Combustible Solids |
| WGK (Germany) | 1 |
Other Names
(E)-3-phenylprop-2-enoic acid(E)-Cinnamatetrans-Cinnamate(E)-cinnamic acidPhenylacrylic acidCinnamic acid, (E)-trans-Cinnamic acid3-STYRYLACRYLIC ACID
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Raw Materials
Derivatives
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