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Physical Characteristic
|
Specification
|
|
Appearance
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A clear, colourless, pale yellow or greenish yellow liquid
|
|
Odor
|
odour, that of spearmint
|
|
Identification.
First identification B.
Second identification A.
|
Complying with test
Thin-layer chromatography
|
|
Relative density @ 25°C
|
0.917 to 0.934 g
|
|
Refractive index @ 20°C
|
1.484 to 1.491
|
|
Optical rotation @ 20°C
|
–45° to –60°
|
|
Acid value
|
Maximum 1.0.
|
|
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
Isomenthone
Menthyl acetate
Pulegone
Menthol
Carvone
|
2.0 to 25.0%
Less than 2.5%
Less than 2.5%
Less than 1.0%
Less than 1.0%
Less than 0.5%
Less than 2.0%
Not Less than 55.0%
|
