|
Physicochemical Properties
|
Neem oila
|
Leaf EOb
|
Stem-bark EO
|
|---|
|
Physical state
|
viscous liquid
|
light viscous liquid
|
light viscous liquid
|
|
Colour
|
brownish
|
light yellow
|
colourless
|
|
Odour
|
garlic repulsive
|
repulsive
|
repulsive
|
|
Relative density
|
0.921 ± 0.014
|
0.904 ± 0.113
|
0.902 ± 0.103
|
|
Acid value (1 mg of KOH/g of oil)
|
15.840 ± 0.0021
|
17.191 ± 0.004
|
19.630 ± 0.001
|
|
Ester index
|
172.201 ± 0.012
|
74.930 ± 4.311
|
53. 150 ± 1.866
|
|
Refractive index at 38 °C
|
1.4667 ± 0.011
|
1.4383 ± 0.031
|
1.4372 ± 0.201
|
|
Saponification value
|
187.620 ± 0.031
|
109.312 ± 0.021
|
72.780 ± 0.011
|
|
Iodine value (%) (g of I2/100 g of oil)
|
77.470 ± 0.011
|
ND
|
ND
|
- aoil extracted from the neem seed by mechanical press
- bessential oil extracted from the leaves and stem-bark by hydrodistillation, ND = not determined
