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 |