Monograph pubs.acs.org/doi/book/10.1021/acsreagents
2,2′-Bipyridine (α,α′-Dipyridyl)
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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 2,2′-Bipyridine provides, in addition to common physical constants, a general description including typical appearance, applications, change in state (approximate), and aqueous solubility. The monograph also details the following specifications and corresponding tests for verifying that a substance meets ACS Reagent Grade specifications including: Melting Point, Clarity, Absorbance of Solution, and Sensitivity to Ferrous Iron.
C10H8N2
Formula Wt 156.19
CAS No. 366-18-7
GENERAL DESCRIPTION Typical appearance . . . . . . . . Applications . . . . . . . . . . . . . Change in state (approximate) . Aqueous solubility . . . . . . . . .
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crystal from dilute alcohol determination of ferrous iron melting point, 69 °C; boiling point, 272–273 °C soluble in about 200 parts water
SPECIFICATIONS Melting point . . . . . . . . . . . . . . . . . . . . . . . ≥70 °C Clarity and absorbance of solution . . . . . . . . . Passes test Sensitivity to ferrous iron . . . . . . . . . . . . . . . Passes test
© 2017 American Chemical Society
A
ACS Reagent Chemicals ACS Reagent Chemicals; American Chemical Society: Washington, DC, 2017.
DOI:10.1021/acsreagents.4056 ACS Reagent Chemicals, Part 4
ACS Reagent Chemicals
Monograph
pubs.acs.org/doi/book/10.1021/acsreagents
TESTS Melting Point [Part 2: Measurement of Physical Properties; Melting Point].
Clarity and Absorbance of Solution Dissolve 5.0 g in 10.0 mL of methanol. The solution should be clear. Measure the absorbance in a 1 cm cell at 400 nm. The absorbance should not exceed 0.30 AU. Save this solution for the sensitivity to ferrous iron test.
Sensitivity to Ferrous Iron
Downloaded by CORNELL UNIV on May 23, 2017 | http://pubs.acs.org Publication Date (Web): February 28, 2017 | doi: 10.1021/acsreagents.4056
To 0.10 mL of iron ion (Fe) standard solution and 0.5 mL of hydroxylamine hydrochloride reagent solution, add 0.1 mL of the solution from the clarity and absorbance of solution test. A distinct red color should develop.
© 2017 American Chemical Society
B
ACS Reagent Chemicals ACS Reagent Chemicals; American Chemical Society: Washington, DC, 2017.
DOI:10.1021/acsreagents.4056 ACS Reagent Chemicals, Part 4
