Table 1.

Physico–chemical properties of castor oil.

Properties	Unit	Value
Specific gravity at 20 °C	g/cm3	0.957–0.961
Acid value	mg of KOH/g	0.562
Saponification value	mg of KOH/g	177.43
Iodine value	gI2/100g	85
pH	–	6.52
Refractive index	–	1.456–1.515
Hydroxy value	–	160–168