Monograph pubs.acs.org/doi/book/10.1021/acsreagents
Ammonium Sulfamate 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
Downloaded by CORNELL UNIV on May 10, 2017 | http://pubs.acs.org Publication Date (Web): February 28, 2017 | doi: 10.1021/acsreagents.4034
ABSTRACT This monograph for Ammonium Sulfamate 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: Assay, Melting Point, Insoluble Matter, Residue after Ignition, and Heavy Metals.
NH4OSO2NH2
Formula Wt 114.12
CAS No. 7773-06-0
GENERAL DESCRIPTION Typical appearance . . . . . . . . Applications . . . . . . . . . . . . . Change in state (approximate) . Aqueous solubility . . . . . . . . .
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colorless hygroscopic solid source for nitrous oxide melting point, 130 °C 200 g in 100 mL at 20 °C
SPECIFICATIONS Assay . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥98.0% NH4OSO2NH2 Melting point . . . . . . . . . . . . . . . . . . . . . . . Within range of 2.0 °C, including 133.0 °C Maximum Allowable Insoluble matter . . . . . . . . . . . . . . . . . . . . . 0.02% Residue after ignition. . . . . . . . . . . . . . . . . . 0.10% Heavy metals (as Pb) . . . . . . . . . . . . . . . . . . 5 ppm
© 2017 American Chemical Society
A
ACS Reagent Chemicals ACS Reagent Chemicals; American Chemical Society: Washington, DC, 2017.
DOI:10.1021/acsreagents.4034 ACS Reagent Chemicals, Part 4
ACS Reagent Chemicals
Monograph
pubs.acs.org/doi/book/10.1021/acsreagents
TESTS Assay (By oxidation–reduction titration). Weigh accurately about 0.35 g, and transfer to a 250 mL flask. Add 75 mL of water and 5 mL of sulfuric acid, swirl to dissolve the sample, and titrate slowly with 0.1 N sodium nitrite volumetric solution, shaking the flask vigorously from time to time. Titrate dropwise near the end point, shaking after each addition, until a blue color is produced immediately when a glass rod dipped into the titrated solution is streaked on starch–iodide test paper. One milliliter of 0.1 N sodium nitrite corresponds to 0.005705 g of NH4OSO2NH2.
Downloaded by CORNELL UNIV on May 10, 2017 | http://pubs.acs.org Publication Date (Web): February 28, 2017 | doi: 10.1021/acsreagents.4034
Melting Point [Part 2: Measurement of Physical Properties; Melting Point].
Insoluble Matter [Part 2: Gravimetric Methods; Insoluble Matter]. Use 5.0 g dissolved in 100 mL of water.
Residue after Ignition [Part 2: Gravimetric Methods; Residue after Ignition]. Ignite 1.0 g.
Heavy Metals [Part 2: Colorimetry and Turbidimetry; Heavy Metals (as Lead); Procedure for Heavy Metals, Method 1]. Dissolve 6.0 g in 20 mL of water, and dilute with water to 30 mL. Use 25 mL to prepare the sample solution, and use the remaining 5 mL to prepare the control solution.
© 2017 American Chemical Society
B
ACS Reagent Chemicals ACS Reagent Chemicals; American Chemical Society: Washington, DC, 2017.
DOI:10.1021/acsreagents.4034 ACS Reagent Chemicals, Part 4
