Monograph pubs.acs.org/doi/book/10.1021/acsreagents
Nitrilotriacetic Acid (N,N-Bis(carboxymethyl)glycine) 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 Nitrilotriacetic Acid 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: Assay (by Alkalimetry) and Clarity of Solution.
C6H9O6N
Formula Wt 191.14
CAS No. 139-13-9
GENERAL DESCRIPTION Typical appearance . . . . . . . . . . . . . . . . . . . white to off-white solid Applications . . . . . . . . . . . . . . . . . . . . . . . . sequestration of metals; chelometric analysis Aqueous solubility . . . . . . . . . . . . . . . . . . . . 1.28 g in 1 L at 22.5 °C
SPECIFICATIONS Assay . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥98.0% C6H9O6N Clarity of solution . . . . . . . . . . . . . . . . . . . . Passes test
© 2017 American Chemical Society
A
DOI:10.1021/acsreagents.4245 ACS Reagent Chemicals, Part 4
ACS Reagent Chemicals
Monograph
pubs.acs.org/doi/book/10.1021/acsreagents
TESTS Assay (by Alkalimetry) and Clarity of Solution To check for clarity of solution, weigh accurately about 0.35 g, transfer to a beaker, and dissolve in 100 mL of water. The sample should dissolve completely, with heating and stirring if necessary, to produce a clear solution. For the assay, add 0.15 mL of phenolphthalein indicator solution, and titrate with 0.1 N sodium hydroxide. One milliliter of 0.1 N sodium hydroxide corresponds to 0.009557 g of C6H9O6N.
© 2017 American Chemical Society
B
DOI:10.1021/acsreagents.4245 ACS Reagent Chemicals, Part 4
