C10H12O2 164.20

Phenol, 2-methoxy-4-(2-propenyl)-.
4-Allyl-2-methoxyphenol [97-53-0].

Packaging and storage— Preserve in tight, light-resistant containers.

Solubility in 70 percent alcohol— One volume dissolves in 2 volumes of 70 percent alcohol.

Specific gravity 841: between 1.064 and 1.070.

Distilling range, Method II 721— Not less than 95% distills between 250 and 255.

Refractive index 831: between 1.540 and 1.542 at 20.

Heavy metals, Method II 231: 0.004%.

Hydrocarbons— Dissolve 1 mL in 20 mL of 0.5 N sodium hydroxide in a stoppered, 50-mL tube, add 18 mL of water, and mix: a clear mixture results immediately, but it may become turbid when exposed to air.

Limit of phenol— Shake 1 mL with 20 mL of water, filter, and add 1 drop of ferric chloride TS to 5 mL of the clear filtrate: the mixture exhibits a transient grayish green color but not a blue or violet color.

Topic/Question	Contact	Expert Committee
Monograph	Clydewyn M. Anthony, Ph.D. Scientist 1-301-816-8139	(MDCCA05) Monograph Development-Cough Cold and Analgesics

USP32–NF27 Page 2342