Monograph pubs.acs.org/doi/book/10.1021/acsreagents
Nickel Chloride Hexahydrate (Nickel(II) Chloride Hexahydrate; Nickelous Chloride Hexahydrate) 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 Nickel Chloride Hexahydrate 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, Insoluble Matter, Nitrogen Compounds, Sulfate, Calcium, Cobalt, Copper, Iron, Lead, Magnesium, Manganese, Potassium, Sodium, and Zinc.
NiCl2 • 6H2O
Formula Wt 237.69
CAS No. 7791-20-0
GENERAL DESCRIPTION Typical appearance . . . . . . . . . . . . . . . . . . . green solid Applications . . . . . . . . . . . . . . . . . . . . . . . . electroplating Aqueous solubility . . . . . . . . . . . . . . . . . . . . 254 g in 100 mL at 20 °C
SPECIFICATIONS Assay . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥97% NiCl2 · 6H2O Maximum Allowable Insoluble matter . . . . . . . . . . . . . . . . . . . . . 0.005% Nitrogen compounds (as N) . . . . . . . . . . . . . . 0.005% Sulfate (SO4) . . . . . . . . . . . . . . . . . . . . . . . 0.005% Calcium (Ca) . . . . . . . . . . . . . . . . . . . . . . . 0.01% Cobalt (Co) . . . . . . . . . . . . . . . . . . . . . . . . 0.1% Copper (Cu) . . . . . . . . . . . . . . . . . . . . . . . . 0.002% Iron (Fe) . . . . . . . . . . . . . . . . . . . . . . . . . . 0.002% Lead (Pb) . . . . . . . . . . . . . . . . . . . . . . . . . 0.005% Magnesium (Mg) . . . . . . . . . . . . . . . . . . . . . 0.01% Manganese (Mn) . . . . . . . . . . . . . . . . . . . . . 0.002%
© 2017 American Chemical Society
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DOI:10.1021/acsreagents.4238 ACS Reagent Chemicals, Part 4
ACS Reagent Chemicals
Monograph
pubs.acs.org/doi/book/10.1021/acsreagents
Potassium (K) . . . . . . . . . . . . . . . . . . . . . . . 0.01% Sodium (Na) . . . . . . . . . . . . . . . . . . . . . . . . 0.05% Zinc (Zn) . . . . . . . . . . . . . . . . . . . . . . . . . . 0.01%
TESTS Assay (By complexometric titration of nickel). Weigh accurately 1 g, transfer to a 400 mL beaker, and dissolve in 250 mL of water. Add 10 mL of pH 10 ammoniacal buffer solution and about 50 mg of murexide indicator mixture. Titrate immediately with 0.1 M EDTA volumetric solution to a purple color. One milliliter of 0.1 M EDTA corresponds to 0.02377 g of NiCl2 · 6H2O.
Insoluble Matter [Part 2: Gravimetric Methods; Insoluble Matter]. Dissolve 20 g in 150 mL of water. Retain the filtrate for the test for sulfate.
Nitrogen Compounds [Part 2: Colorimetry and Turbidimetry; Nitrogen Compounds]. Use 0.4 g. For the standard, use 0.02 mg of nitrogen.
Sulfate [Part 2: Colorimetry and Turbidimetry; Sulfate; Procedure for Sulfate, Method 1]. Use 7.5 mL (1.0 g) of the filtrate retained from the test for insoluble matter. Allow 30 min for turbidity to develop.
Calcium, Cobalt, Copper, Iron, Lead, Magnesium, Manganese, Potassium, Sodium, and Zinc (By flame AAS, [Part 2: Trace and Ultratrace Elemental Analysis; Atomic Absorption Spectroscopy; Analysis; Procedure for Flame AAS]).
For the Determination of Calcium, Cobalt, Copper, Iron, Lead, Magnesium, Manganese, Potassium, Sodium, and Zinc
S a m p l e S t o c k S o l u t i o n . Dissolve 20.0 g of sample in 75 mL of water and 2 mL of nitric acid. Transfer to a 100 mL volumetric flask, and dilute to the mark with water (1 mL = 0.20 g).
For the Determination of Calcium, Cobalt, Copper, Iron, Lead, Magnesium, Manganese, Potassium, Sodium, and Zinc
Element
Wavelength (nm)
Sample Wt (g)
Standard Added (mg)
Flame Type*
Background Correction
Ca
422.7
2.0
0.05; 0.10
N/A
No
Co
240.7
2.0
0.02; 0.04
A/A
Yes
© 2017 American Chemical Society
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DOI:10.1021/acsreagents.4238 ACS Reagent Chemicals, Part 4
ACS Reagent Chemicals
Monograph
pubs.acs.org/doi/book/10.1021/acsreagents
For the Determination of Calcium, Cobalt, Copper, Iron, Lead, Magnesium, Manganese, Potassium, Sodium, and Zinc (continued)
Element
Wavelength (nm)
Sample Wt (g)
Standard Added (mg)
Flame Type*
Background Correction
Cu
324.8
2.0
0.05; 0.10
A/A
Yes
Fe
248.3
4.0
0.04; 0.08
A/A
Yes
Pb
217.0
2.0
0.10; 0.20
A/A
Yes
Mg
285.2
0.20
0.005; 0.01
A/A
Yes
Mn
279.5
2.0
0.02; 0.04
A/A
Yes
K
766.5
0.20
0.01; 0.02
A/A
No
Na
589.0
0.10
0.025; 0.05
A/A
No
Zn
213.9
2.0
0.05; 0.10
A/A
Yes
*A/A is air/acetylene; N/A is nitrous oxide/acetylene.
© 2017 American Chemical Society
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DOI:10.1021/acsreagents.4238 ACS Reagent Chemicals, Part 4
