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Cinnamic acid  Structure

Cinnamic acid

Chemical Properties

Melting point 133 °C(lit.)
Boiling point 300 °C(lit.)
Density  1.2475
refractive index  1.5049 (estimate)
FEMA  2288 | CINNAMIC ACID
Flash point >230 °F
storage temp.  Sealed in dry,Room Temperature
solubility  Chloroform (Slightly), Methanol (Slightly)
form  Solid
pka pK (25°) 4.46
color  White to Off-White
PH 3.76(1 mM solution);3.23(10 mM solution);2.72(100 mM solution)
Odor at 100.00 %. balsam sweet storax
Odor Type balsamic
Water Solubility  511.2mg/L(25 ºC)
JECFA Number 657
Stability Stable. Combustible. Incompatible with strong oxidizing agents.
LogP 2.13
CAS DataBase Reference 621-82-9(CAS DataBase Reference)
Substances Added to Food (formerly EAFUS) CINNAMIC ACID
FDA 21 CFR 172.515
EWG's Food Scores 1
FDA UNII U14A832J8D
NIST Chemistry Reference 2-Propenoic acid, 3-phenyl-(621-82-9)
EPA Substance Registry System Cinnamic acid (621-82-9)

Safety

Symbol(GHS)
Signal wordWarning
Hazard statements H302-H315-H319-H335
Precautionary statements P261-P305+P351+P338
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)

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