Monograph pubs.acs.org/doi/book/10.1021/acsreagents
Diphenylaminesulfonic Acid Sodium Salt (Sodium Diphenylaminesulfonate) 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 Diphenylaminesulfonic Acid Sodium Salt provides, in addition to common physical constants, a general description including typical appearance, applications, and aqueous solubility. The monograph also details the following specifications and corresponding tests for verifying that a substance meets ACS Reagent Grade specifications including: Sensitivity as Indicator.
C6H5NHC6H4SO3Na
Formula Wt 271.27
CAS No. 6152-67-6
GENERAL DESCRIPTION Typical appearance . . . . . . . . . . . . . . . . . . . off-white solid Applications . . . . . . . . . . . . . . . . . . . . . . . . indicator for redox titrations Aqueous solubility . . . . . . . . . . . . . . . . . . . . very soluble
SPECIFICATION Sensitivity as indicator . . . . . . . . . . . . . . . . . Passes test
© 2017 American Chemical Society
A
DOI:10.1021/acsreagents.4127 ACS Reagent Chemicals, Part 4
ACS Reagent Chemicals
Monograph
pubs.acs.org/doi/book/10.1021/acsreagents
TEST Sensitivity as Indicator Dissolve 0.15 g in 100 mL of water. To 25 mL of water in a 50-mL test tube, add 10 mL of 4 N sulfuric acid reagent solution, 5 mL of phosphoric acid, 0.05 mL of 0.01 N ferrous ammonium sulfate, and 0.05 mL of the sample solution. The addition of 0.10 mL of 0.01 N potassium dichromate should produce a violet color. The color should be completely discharged by the addition of 0.10 mL of 0.01 N ferrous ammonium sulfate.
© 2017 American Chemical Society
B
DOI:10.1021/acsreagents.4127 ACS Reagent Chemicals, Part 4
