First Special Grade castor oil specification.
 
Appearance
Pale  yellow, viscous  liquid
Sp.Gravity@15.5/15.5°C----
Wt. per ml.@30°C0.954 -0.960
M.I.V.0.25% max.
Refractive index@ 40º deg C1.4700 -1.4740
Optical  Rotation3.5
Iodine value @40º deg C82-90
Saponification  value177-185
Unsaponifiable   matter1% max.
Free Fatty Acid (FFA) as----
Oleic acid
Acid Value2 max.
Acteyl Value140 min.
Colour in Lovibond3.7 Units max.
1" cell.Y + 5R Basis2.2Y,0.3R max.