Physical Characteristic

Specification

Appearance

A colourless, pale yellow or pale greenish-yellow liquid.

Odor

characteristic odour and taste followed by a sensation of cold.

Identification.

First identification B.

Second identification A.

Complying with test

Thin-layer chromatography

Relative density @ 25°C

0.900 to 0.916.

Refractive index @ 20°C

1.457 to 1.467.

Optical rotation @ 20°C

- 10° to - 30°.

Acid value

Maximum 1.4,

Fatty oils and resinified essential oils

It complies with the test.

Solubility

Miscible with alcohol and with methylene chloride.

Assay by GC

limonene

cineole

menthone

menthofuran

isomenthone

menthyl acetate:

isopulegol

menthol

pulegone

carvone

1.0 to 5.0%

3.5 to 14.0%

14.0 to 32.0%

1.0 to 9.0%

1.5 to 10.0%

2.8 to 10.0%

Max 0.2%

30.0 to 55.0%

Max 4.0%

Max 1.0%