Physical Characteristic

Specification

Appearance

Clear, colourless or pale yellow liquid. 

Odor

characteristic Anise odour.

Identification Second identification A.

First identification B.

Complying with test

Relative density @ 25°C

0.980 to 0.990.

Refractive index @ 20°C

1.552 to 1.561.

Freezing point

15 °C to 19 °C.

Fenchone

maximum 0.01 per cent.

Foeniculin

maximum 0.01 per cent.

Optical rotation @ 20°C

- 12.5 ° to - 7.0 °

Acid value

Maximum 1.0

Solubility

Soluble in ethanol 95%

Fatty oils and resinified essential oils

complies with the test

Assay by GC:

Linalool

Estragole

a-terpineol

cis-anethole

trans-anethole

anisaldehyde

pseudoisoeugenyl 2-methylbutyrate:

Less than 1.5%

0.5 to 5.0%

less than 1.2%

0.1 to 0.4%

87 to 94.0%

0.1 to 1.4%

0.3 to 2.0%