Monograph pubs.acs.org/doi/book/10.1021/acsreagents
Ethyl Alcohol, Absolute (Ethanol, Absolute) 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 Ethyl Alcohol, Absolute 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: Water, Assay and Other Tests.
CH3CH2OH
Formula Wt 46.07
CAS No. 64-17-5
GENERAL DESCRIPTION Typical appearance . . . . . . . . Applications . . . . . . . . . . . . . Change in state (approximate) . Aqueous solubility . . . . . . . . . Density . . . . . . . . . . . . . . . .
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colorless, clear liquid extraction medium; chromatographic reagent boiling point, 78 °C miscible 0.79
SPECIFICATIONS Assay . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥99.5% CH3CH2OH by volume (about 99.2% by weight) Maximum Allowable Water (H2O) . . . . . . . . . . . . . . . . . . . . . . . . 0.2% Color (APHA) . . . . . . . . . . . . . . . . . . . . . . . 10 Solubility in water . . . . . . . . . . . . . . . . . . . . Passes test Residue after evaporation . . . . . . . . . . . . . . . 0.001% Acetone . . . . . . . . . . . . . . . . . . . . . . . . . . isopropyl alcohol, Passes test Titrable acid . . . . . . . . . . . . . . . . . . . . . . . 0.0005 meq/g Titrable base . . . . . . . . . . . . . . . . . . . . . . . 0.0002 meq/g Methanol (CH3OH) . . . . . . . . . . . . . . . . . . . . 0.1%
© 2017 American Chemical Society
A
DOI:10.1021/acsreagents.4136 ACS Reagent Chemicals, Part 4
ACS Reagent Chemicals
Monograph
pubs.acs.org/doi/book/10.1021/acsreagents
Substances darkened by sulfuric acid . . . . . . . . Passes test Substances reducing permanganate . . . . . . . . . Passes test
TESTS Water [Part 2: Titrimetric Methods; Water by the Karl Fischer Method; Coulometric Procedure; Coulometric Procedure for Samples Using Karl Fischer Reagent, Method 2]. Use 2 mL (1.58 g).
Assay and Other Tests These are the same as for ethyl alcohol, [Part 4: Ethyl Alcohol].
© 2017 American Chemical Society
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DOI:10.1021/acsreagents.4136 ACS Reagent Chemicals, Part 4
