Oragnoleptic properties

Specification

Appearance

Colourless to pale yellow  clear liquid

Odour 

Pleasant and aromatics, mentha odour

Solubility

Insoluble in water, soluble 1 vol. of solute in 3vol. of solvent (96%)

Physical Characteristic

Refractive index @ 20 ^oC

1.445 to 1.485

Specific gravity @ 25 ^oC

0.870  to 0.925

Optical rotation

-10.5 to -39.5

Acid value

NMT 2.00mgKOH/gm

Water content

0.20% Max

Fixed and Resinified

Essential Oils

As per IP

Dimethyl Sulphide

As per IP

Acidity

To 2 g add 0.25 ml of phenolphthalein solution; not more than 0.1 ml of 0.5M ethanolic potassium hydroxide is required to

change the colour of the solution.

Chromatographic Analysis:%

Ester content

Ketone

L- Menthol

2.5 to 9.5

Max 33.5

NMT 40.0