3-Indolepropionic acid

Melting point  134-135 °C(lit.)

Boiling point  82 °C(lit.)

density  0.960 g/mL at 20 °C

vapor density  2.1 (vs air)

vapor pressure  33 mm Hg ( 20 °C)

refractive index  n20/D 1.377(lit.)

Fp  53 °F

storage temp.  −20°C

solubility  ethanol: soluble50mg/mL, clear, yellow to orange 

pka 4.77±0.10(Predicted) 

form  crystalline

color  light yellow

Water Solubility  slightly soluble