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Cinnamic acid Basic information Chemical Properties Physical and Chemical Properties Role and purpose Uses Preparation Content Analysis Toxicity Limited use Production method Product Name: Cinnamic acid Synonyms: AKOS B004228;AKOS 233-01;3-PHENYLACRYLIC ACID;3-PHENYLPROPENOIC ACID;3-STYRYLACRYLIC ACID;RARECHEM BK HC T302;TRANS-3-PHENYLPROPENOIC ACID;TRANS-3-BENZENEPROPENOIC ACID CAS: 621-82-9 MF: C9H8O2 MW: 148.16 EINECS: 210-708-3 Product Categories:   Mol File: 621-82-9.mol   Cinnamic acid Chemical Properties Melting point 133 °C(lit.) Boiling point 300 °C(lit.) density 1.2475 FEMA 2288 | CINNAMIC ACID refractive index 1.5049 (estimate) Fp >230 °F storage temp. Sealed in dry,Room Temperature pka pK (25°) 4.46 Water Solubility 511.2mg/L(25 ºC) JECFA Number 657 Stability: Stable. Combustible. Incompatible with strong oxidizing agents. CAS DataBase Reference 621-82-9(CAS DataBase Reference) NIST Chemistry Reference 2-Propenoic acid, 3-phenyl-(621-82-9) EPA Substance Registry System Cinnamic acid (621-82-9)   Safety Information Hazard Codes Xi Risk Statements 36/37/38 Safety Statements 26-36 WGK Germany 1 RTECS GD7850000 Toxicity LD50 (g/kg): 3.57 orally in rats; >5.0 dermally in rabbits (Letizia)