Organic Acids
REACH
Cinnamic acid
CAS Number
140-10-3
EC Number
205-398-1
FEMA Number
FEMA 2288
What is Cinnamic acid?
Cinnamic acid (CAS 140-10-3) is a naturally occurring organic acid used in fragrance, cosmetic, pharmaceutical and polymer applications. Also known in trade as trans-cinnamate.
Where is Cinnamic acid used?
- Personal care and cosmetics: key building block for cinnamate-based UV filters in sunscreen formulations
- Pharmaceuticals: synthesis intermediate for active ingredients and pH modifier
- Flavors and fragrances: warm, balsamic notes in fine fragrance compounds, soap bases and flavoring blends
- Polymer and resin formulators incorporate it as a photosensitive crosslinking agent in UV-curable coatings.
- It is also utilized in photoresist systems for printing and packaging.
Good to know: Functions primarily as a UV absorber and flavoring acidulant. Food-grade material conforms to FCC standards; pharmaceutical-grade material meets USP or BP specifications.
Other Names (Synonyms)
trans-Cinnamate|trans-beta-carboxystyrene|trans-b-Carboxystyrene|trans-3-phenylacrylic acid|trans-3-Phenylacrylate|trans-3-Phenyl-2-propenoic acid|trans-3-Phenyl-2-propenoate|Phenylacrylic acid
What are the physical properties of Cinnamic acid?
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
How is Cinnamic acid classified and handled safely? Learn More
Warning
GHS07· Irritant
Hazard Statements
H315 Causes skin irritation
H319 Causes serious eye irritation
H335 May cause respiratory irritation
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.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
Which trade and regulatory codes apply to Cinnamic acid?
HS Code 29163900
Storage Class 13 - Non Combustible Solids
WGK (Germany) 1