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trans-Cinnamic acid

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trans-Cinnamic acid Basic information

Product Name:
trans-Cinnamic acid
CAS:
140-10-3
MF:
C9H8O2
MW:
148.16
EINECS:
205-398-1
Mol File:
140-10-3.mol
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trans-Cinnamic acid Chemical Properties

Melting point:
133 °C(lit.)
Boiling point:
300 °C(lit.)
Density 
1.248
vapor pressure 
1.3 hPa (128 °C)
refractive index 
1.5049 (estimate)
Flash point:
>230 °F
storage temp. 
Store at RT.
solubility 
0.4g/l
pka
4.44(at 25℃)
form 
Crystalline Powder
color 
White to almost white
Specific Gravity
0.91
Odor
Faint odour
PH
3-4 (0.4g/l, H2O, 20℃)
PH Range
3 - 4
Water Solubility 
0.4 g/L (20 ºC)
λmax
273nm(MeOH)(lit.)
Merck 
14,2299
BRN 
1905952
InChIKey
WBYWAXJHAXSJNI-VOTSOKGWSA-N
CAS DataBase Reference
140-10-3(CAS DataBase Reference)
NIST Chemistry Reference
Cinnamic acid(140-10-3)
EPA Substance Registry System
(E)-Cinnamic acid (140-10-3)
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Safety Information

Hazard Codes 
Xi
Risk Statements 
36/37/38
Safety Statements 
26-36-37/39
WGK Germany 
1
RTECS 
GD7850000
TSCA 
Yes
HS Code 
29163900
Toxicity
LD50 orally in Rabbit: 2500 mg/kg LD50 dermal Rabbit > 5000 mg/kg

MSDS

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trans-Cinnamic acid Usage And Synthesis

Chemical Properties

White to almost white crystalline powder

Purification Methods

Crystallise the acid from *benzene, CCl4, hot water, water/EtOH (3:1), or 20% aqueous EtOH. Dry it at 60o in vacuo. It is steam volatile. [Beilstein 9 IV 2002.]

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