Monograph pubs.acs.org/doi/book/10.1021/acsreagents
1-Octanol (n-Octyl Alcohol) Part 4, Monographs for Reagent Chemicals: General Descriptions, Specifications, and Tests eISBN: 9780841230460 Tom Tyner Chair, ACS Committee on Analytical Reagents James Francis Secretary, ACS Committee on Analytical Reagents
ABSTRACT This monograph for 1-Octanol provides, in addition to common physical constants, a general description including typical appearance, applications, change in state (approximate), aqueous solubility, and density. The monograph also details the following specifications and corresponding tests for verifying that a substance meets ACS Reagent Grade specifications including: Assay, Color (APHA), Residue after Evaporation, Titrable Acid, and Ultraviolet Spectrophotometry.
C8H18O
Formula Wt 130.23
CAS No. 111-87-5
GENERAL DESCRIPTION Typical appearance . . . . . . . . Applications . . . . . . . . . . . . . Change in state (approximate) . Aqueous solubility . . . . . . . . . Density . . . . . . . . . . . . . . . .
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clear, colorless liquid; penetrating odor solvent; determination of TSCA partition coefficients boiling point, 194–195 °C insoluble 0.83
SPECIFICATIONS General Use Assay . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥99% C8H18O Maximum Allowable Color (APHA) . . . . . . . . . . . . . . . . . . . . . . 10 Residue after evaporation . . . . . . . . . . . . . . 0.004% Titrable acid . . . . . . . . . . . . . . . . . . . . . . 0.0002 meq/g
© 2017 American Chemical Society
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DOI:10.1021/acsreagents.4248 ACS Reagent Chemicals, Part 4
ACS Reagent Chemicals
Monograph
pubs.acs.org/doi/book/10.1021/acsreagents
Specific Use Ultraviolet Spectrophotometry Wavelength (nm) 280–400 . . . . . . . . . . . . . . . . 260 . . . . . . . . . . . . . . . . . . . 240 . . . . . . . . . . . . . . . . . . . 230 . . . . . . . . . . . . . . . . . . . 220 . . . . . . . . . . . . . . . . . . .
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Absorbance (AU) . 0.01 . 0.05 . 0.10 . 0.5 . 1.0
TESTS Assay Analyze the sample by gas chromatography using the general parameters cited in [Part 2: Chromatography; Recommended Procedures; Gas Chromatography]. The following specific conditions are also required. Column . . . . . . . . . . . . . . . . . . . . . . . . . . Type I, methyl silicone Measure the area under all peaks and calculate the 1-octanol content in area percent. Correct for water content.
Color (APHA) [Part 2: Measurement of Physical Properties; Color (APHA); Procedure for Color (APHA)].
Residue after Evaporation [Part 2: Gravimetric Methods; Residue after Evaporation]. Evaporate 100 g (120.5 mL) to dryness in a tared, preconditioned platinum dish on a hot plate (~100 °C) in a well-ventilated hood, and dry the residue at 105 °C for 30 min.
Titrable Acid To 25 mL of ethyl alcohol, add 0.15 mL of phenolphthalein indicator solution, and neutralize the solution with either 0.01 N sodium hydroxide or 0.01 N hydrochloric acid. Add 21.0 g (25 mL) of sample, and titrate with 0.01 N sodium hydroxide to a pink end point. Not more than 0.4 mL should be required.
Ultraviolet Spectrophotometry Use the procedure in [Part 2: Chromatography; Recommended Procedures; LC Suitability; Procedure for Absorbance] to determine the absorbance.
© 2017 American Chemical Society
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DOI:10.1021/acsreagents.4248 ACS Reagent Chemicals, Part 4
