Table 4 Physical properties of castor oil, Neem oil, Til oil, mustard oil.

Density

0.967gm/ml at 25 °C

0.84 g/ml

0.921–0.924 g/cm³ at 15 °C

0.91 g/cm³

Solubility in water

Very poor

Emulsifies with water

Insoluble

2 g/L (20 °C)

Melting point

-10 to -18 °C

14 °C

-6 to -3 °C

-80 °C

Flashpoint (°C)

229 °C

More than 170 °C – no fire Hazard

255 °C

36.3 °C

Boiling point

313 °C

> 100 °C

338–366 °C

151.9 °C at 760 mm Hg

odor

Faint, mild odour

Brown Viscous liquid

Almost odourless

-

Viscosity

6–8 poise at 25 °C

Viscous material

65 mPa-s at 20 °C

-

Refractive Index

1.473–1.477 at 25 °C

-

1.473–1.476 at 20 °C

1.484

Vapour Pressure

-

38 to 200 °C

9.0*10^− 5 mm-Hg at 25 °C

4.57 mm Hg at 25 °C