Phenylethyl Alcohol
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This article is compiled based on the United States Pharmacopeia (USP) – 2025 Edition
Issued and maintained by the United States Pharmacopeial Convention (USP)
C8H10O 122.16
Benzeneethanol;
Phenethyl alcohol CAS RN®: 60-12-8.
1 IDENTIFICATION
Change to read:
A. Spectroscopic Identification Tests 〈197〉, Infrared Spectroscopy: 197F (CN 1-May-2020)
2 IMPURITIES
Residue on Ignition 〈281〉
Sample: 10 mL
Analysis: Evaporate the Sample in a suitable crucible, and ignite to constant weight.
Acceptance criteria: NMT 0.005%
3 SPECIFIC TESTS
Specific Gravity 〈841〉: 1.017–1.020
Refractive Index 〈831〉: 1.531–1.534 at 20°
Chlorinated Compounds
Sample: 2 drops
Analysis: Wind a 1.5- × 5-cm strip of 20-mesh copper gauze around the end of a copper wire. Heat the gauze in the nonluminous flame of a Bunsen burner until it glows without coloring the flame green. Permit the gauze to cool, and heat several times until a good coat of oxide has formed. Apply the Sample to the cooled gauze with a medicine dropper, ignite, and permit it to burn freely in the air. Again cool the gauze, add a second Sample, and burn as before. Continue this process until a total of 6 drops has been added and ignited, and then hold the gauze in the outer edge of the Bunsen flame, adjusted to a height of about 4 cm.
Acceptance criteria: No transient green color or other color is imparted to the flame.
Aldehyde
Sample: 5 mL
Analysis: Shake the Sample with 5 mL of 1 N sodium hydroxide, and allow to stand for 1 h.
Acceptance criteria: No yellow color appears in the organic (top) layer.
4 ADDITIONAL REQUIREMENTS
Packaging and Storage: Preserve in tight, light-resistant containers, and store in a cool, dry place.
USP Reference Standards 〈11〉
USP Phenylethyl Alcohol RS
