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Zinc Acetate

Zinc Acetate USP BP ACS Reagent Suppliers and Manufacturers' Representative

CAS number : 5970-45-6 & 557-34-6
Molecular Weight: 183.5
Chemical Formula: (CH3COO)2Zn.2H2O

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DESCRIPTION

Specifications of Commercial Pure Zinc Acetate Dihydrate
Assay 99% (CH3COO)2Zn . 2H2O
Appearance White
Water .01%
pH of a 5% solution 6.0-7.0 at 25C
Insoluble matter 0.03% max
Iron (Fe) 5 ppm
Lead (Pb) 0.002%

Zinc Acetate USP Dihydrate
Formula: C4H6O4Zn-2H2O
Weight: 219.51
Acetic acid, zinc salt, dihydrate.
Zinc acetate dihydrate [CAS Number 5970-45-6]
Anhydrous 183.48 [CAS Number 557-34-6]

Zinc Acetate contains not less than 98.0 percent and not more than 102.0 percent of C4H6O4Zn·2H2O.

Identification: A solution (1 in 20) responds to the tests for Zinc and for Acetate.
pH: between 6.0 and 8.0, in a solution (1 in 20).
Insoluble matter: A 20-g portion, dissolved in 150 mL of water containing 1 mL of glacial acetic acid, shows not more than 1.0 mg of insoluble matter (0.005%).
Arsenic: 3 ppm.
Lead: (0.002%).
Chloride: (0.005%).
Sulfate: (0.010%).
Alkalies and alkaline earths: (0.2%).

Zinc Acetate BP
Formula: C4H6O4Zn-2H2O

DEFINITION
Content: 99.0 per cent to 101.0 per cent of C4H6O4Zn-2H2O

CHARACTERS
Appearance: White or almost white crystalline powder or flakes.
Solubility: Freely soluble in water, soluble in ethanol (96 per cent).

IDENTIFICATION
A. It gives reaction of acetates.
B. It gives the reaction of zinc.

TESTS
Solution S: Dissolve 10.0 g in carbon dioxide-free water prepared from distilled water and dilute to 100 ml with the same solvent.
Appearance of solution: Solution S is clear and colourless.
pH: 5.8 to 7.0.
Dilute 10 ml of solution S to 20 ml with carbon dioxide-free water.
Reducing substances: Boil for 5 min a mixture of 10 ml of solution S, 90 ml of water R, 5 ml of dilute sulphuric acid and 1.5 ml of a 0.3 g/l solution of potassium permanganate. The pink colour of the solution remains.
Chlorides: Maximum 50 ppm.
Sulphates: Maximum 100 ppm, determined on solution S.
Aluminium: Maximum 5.0 ppm.
Atomic absorption spectrometry to pass the test.
Arsenic: Maximum 2 ppm, determined on 0.5 g.
Cadmium: Maximum 2.0 ppm.
Atomic absorption spectrometry to pass the test.
Copper: Maximum 50.0 ppm.: Atomic absorption spectrometry to pass the test.
Iron: Maximum 50.0 ppm.
Atomic absorption spectrometry to pass the test.
Lead: Maximum 10.0 ppm.
Atomic absorption spectrometry to pass the test.

Zinc Acetate Dihydrate ACS Analytical Reagent
Formula: (CH3COO)2Zn-2H2O
Weight: 219.51
CAS Number: 5970-45-6

REQUIREMENTS
Assay: 98.0-101.0% (CH3COO)2Zn . 2H2O
pH of a 5% solution: 6.0-7.0 at 25C

MAXIMUM ALLOWABLE
Insoluble matter: 0.005%
Chloride (Cl): 5 ppm
Sulfate (SO4): 0.005%
Calcium (Ca): 0.005%
Magnesium (Mg): 0.005%
Potassium (K): 0.01%
Sodium (Na): 0.05%
Iron (Fe): 5 ppm
Lead (Pb): 0.002%


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