| CAS No.: | 112-92-5 |
| Molecular Weight: | 270.49 g/mol |
| Chemical Formula | C18H38O |
Specifications of Stearyl Alcohol or 1-Octadecanol or Octadecan-1-ol:
Appearance: White granules or flakes or crystals.
Assay: NLT 90.0% and NMT 102.0% C18H38O.
Odor: Faint:
Melting Point: 59C to 60C.
Boiling Point: about 336C.
Flash Point: 185C.
Auto-ignition Temperature: 450C.
Solubility: Insoluble in water. Soluble in alcohol, ether, benzene, acetone.
Stearyl Alcohol USP NF Grade Specifications:
C18H38O --- 270.49
1-Octadecanol;
Octadecan-1-ol CAS 112-92-5
UNII: 2KR89I4H1Y
DEFINITION
Stearyl Alcohol contains NLT 90.0% and NMT 102.0% of stearyl alcohol (C18H38O), the remainder consisting chiefly of related alcohols. It is obtained from sources of vegetable, animal, or synthetic origin.
IDENTIFICATION
A. Chromatographic Identity
Analysis: Proceed as directed in the Assay.
Acceptance criteria: The retention time of the major peak of the Sample solution, excluding the solvent and internal standard peaks, corresponds to the stearyl alcohol peak of the System suitability solution.
Residue on Ignition: NMT 0.1%, determined on 2 g.
Limit of Related Fatty Alcohols: To pass the test.
Fats and Fixed Oils, Acid Value (Free Fatty Acids): NMT 2
Fats and Fixed Oils, Hydroxyl Value: 195–220
Fats and Fixed Oils, Iodine Value: NMT 2
Water Determination: NMT 0.5%
Stearyl Alcohol BP Ph Eur Grade Specifications:
Action and use: Excipient.
DEFINITION
Mixture of solid alcohols, mainly octadecan-1-ol (C18H38O; Mr 270.5), of animal or vegetable origin.
Content: Minimum 95.0 per cent of C18H38O.
CHARACTERS
Appearance: White or almost white, unctuous flakes, granules or mass.
Solubility: Practically insoluble in water, soluble in ethanol (96 per cent). When melted, it is miscible with fatty oils, with liquid paraffin and with melted wool fat.
IDENTIFICATION
Examine the chromatograms obtained in the assay.
Results: The principal peak in the chromatogram obtained with the test solution is similar in retention time to the principal peak in the chromatogram obtained with reference solution (b).
