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C10H12O 148.21

Benzene, 1-methoxy-4-(1-propenyl)-, (E)-.
(E)-p-Propenylanisole [4180-23-8].

Synthetic [104-46-1].
» Anethole is obtained from Anise Oil and other sources, or is prepared synthetically.
Packaging and storage— Preserve in tight, light-resistant containers.
Labeling— Label it to indicate whether it is obtained from natural sources or is prepared synthetically.
Specific gravity 841: between 0.983 and 0.988.
Congealing temperature 651: not lower than 20.
Distilling range, Method I 721: between 231 and 237, a correction factor of 0.063 per mm being applied as necessary.
Angular rotation 781A: between 0.15 and +0.15.
Refractive index 831: between 1.557 and 1.561.
Aldehydes and ketones— Shake 10 mL with 50 mL of a saturated solution of sodium bisulfite in a graduated cylinder, and allow the mixture to stand for 6 hours: no appreciable diminution in the volume of Anethole occurs, and no crystalline deposit separates.
Limit of phenols— Shake 1 mL with 20 mL of water, and allow the liquids to separate. Pass the water layer through a filter paper previously moistened with water, and to 10 mL of the filtrate add 3 drops of ferric chloride TS: no purple or purplish color is produced.
Auxiliary Information— Please check for your question in the FAQs before contacting USP.
Topic/Question Contact Expert Committee
Monograph Robert H. Lafaver, B.A.
(EM105) Excipient Monographs 1
USP32–NF27 Page 1166
Chromatographic Column—
Chromatographic columns text is not derived from, and not part of, USP 32 or NF 27.