American Molecules - USA

Zinc Sulfate Heptahydrate Hexahydrate Monohydrate Anhydrous USP Analytical FCC Food Grade Supplier Exporter Manufacturers' Representative, also Micro-Encapsulated Zinc Sulfate

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Zinc Sulfate Heptahydrate Hexahydrate Monohydrate Anhydrous
CAS Number:
Zinc Sulfate Heptahydrate CAS Number 7446-20-0
Zinc Sulfate Hexahydrate CAS Number 13986-24-8
Zinc Sulfate Monohydrate CAS Number 7446-19-7
Zinc Sulfate Anhydrous CAS Number 7733-02-0

Molecular Formula: ZnSO4 Anhydrous
Molecular Weight: 161.44 Anhydrous

Zinc Sulfate Heptahydrate Hexahydrate Suppliers Zinc Sulfate Monohydrate Anhydrous Suppliers
Zinc Sulfate Heptahydrate Hexahydrate and Zinc Sulfate Monohydrate Anhydrous

Zinc Sulfate USP Grade Specifications:
Sulfuric acid, zinc salt (1:1), hydrate;
Zinc sulfate (1:1) monohydrate --- 179.46
Zinc sulfate (1:1) heptahydrate --- 287.56 CAS 7446-20-0
Anhydrous --- 161.44 --- CAS 7733-02-0

Zinc Sulfate contains one or seven molecules of water of hydration. The monohydrate contains NLT 89.0% and NMT 90.4% of zinc sulfate (ZnSO4), corresponding to NLT 99.0% and NMT 100.5% of zinc sulfate monohydrate (ZnSO4-H2O), and the heptahydrate contains NLT 55.6% and NMT 61.0% of zinc sulfate (ZnSO4), corresponding to NLT 99.0% and NMT 108.7% of zinc sulfate heptahydrate (ZnSO4-7H2O).

A. Identification Tests—General, Zinc: Meets the requirements
B. Identification Tests—General, Sulfate: Meets the requirements

Sample: An amount of Zinc Sulfate equivalent to 170 mg of zinc sulfate (ZnSO4)
Analysis: Dissolve the Sample in 100 mL of water. Add 5 mL of ammonia–ammonium chloride buffer and 0.1 mL of eriochrome black and titrate with 0.05 M edetate disodium until the solution is deep blue in color. Each mL of 0.05 M edetate disodium is equivalent to 8.072 mg of zinc sulfate (ZnSO4).
Acceptance criteria:
Monohydrate: 89.0%–90.4% of zinc sulfate (ZnSO4), corresponding to 99.0%–100.5% of zinc sulfate monohydrate (ZnSO4-H2O)
Heptahydrate: 55.6%–61.0% of zinc sulfate (ZnSO4), corresponding to 99.0%–108.7% of zinc sulfate heptahydrate (ZnSO4-7H2O)

Arsenic: NMT 14 ppm
Lead: NMT 20 ppm of lead.
Alkalies and Alkaline Earths:
Sample solution: Dissolve the equivalent of 1.12 g of zinc sulfate (ZnSO4) in 150 mL of water contained in a 200-mL volumetric flask. Add sufficient ammonium sulfide to precipitate the zinc completely and dilute with water to volume. Pass through a dry filter and reject the first portion of the filtrate.
Analysis: To 100 mL of the Sample solution filtrate add a few drops of sulfuric acid, evaporate to dryness in a tared dish, and ignite to constant weight.
Acceptance criteria: The weight of the residue is NMT 5 mg (0.9%).
Sample solution: 28 mg/mL of zinc sulfate (ZnSO4)
Acceptance criteria: The Sample solution is not colored pink by methyl orange.

Specifications of Zinc Sulfate FCC Food Grade
ZnSO4-H2O Formula Weight, monohydrate 179.45
ZnSO4-7H2O Formula Weight, heptahydrate 287.54
CAS: monohydrate 7446-19-7
CAS: heptahydrate 7446-20-0

Zinc Sulfate occurs as colorless, transparent prisms or small needles, or as a granular, crystalline powder. It contains one or seven molecules of water of hydration. The monohydrate loses water at temperatures above 238C; the heptahydrate effloresces in dry air at room temperature. Its solutions are acid to litmus. The monohydrate is soluble in water and practically insoluble in alcohol. One gram of the heptahydrate dissolves in about 0.6 mL of water and in about 2.5 mL of glycerin; it is insoluble in alcohol.
Function: Nutrient.

Identification: A 1:20 aqueous solution gives positive tests for Zinc and for Sulfate.
AssayMonohydrate: Not less than 98.0% and not more than 100.5% of ZnSO4-H2O; Heptahydrate: Not less than 99.0% and not more than 108.7% of ZnSO4-7H2O.
Acidity: Passes test.
Alkalies and Alkaline Earths: Not more than 0.5%.
Cadmium: Not more than 2 mg/kg.
Lead: Not more than 4 mg/kg.
Mercury: Not more than 5 mg/kg.
Selenium: Not more than 0.003%.

Specifications of Zinc Sulfate Analytical Reagent
Zinc Sulfate Heptahydrate
Formula Weight 287.56
CAS Number 7446-20-0

Assay: 99 to 103% ZnSO4-7H2O
pH of a 5% solution: 4.4-6.0 at 25C

Insoluble matter: 0.01%
Chloride (Cl): 5 ppm
Nitrate (NO3): 0.002%
Ammonium (NH4): 0.001%
Calcium (Ca): 0.005%
Iron (Fe): 0.001%
Lead (Pb): 0.003%
Magnesium (Mg): 0.005%
Manganese (Mn): 3 ppm
Potassium (K): 0.01% Sodium (Na): 0.05%

We also supply Zinc Sulfate Heptahydrate Hexahydrate and Zinc Sulfate Monohydrate Anhydrous of BP Ph Eur grade.

We also supply Micro-Encapsulated Zinc Sulfate with core of Zinc Sulfate covered with a coating of vegetable oil or mono and diglycerides. Please visit Micro Encapsulated Zinc Sulfate Suppliers.

Please visit SDS Safety Data Sheet of Zinc Sulfate Heptahydrate Hexahydrate Monohydrate Anhydrous Suppliers.

American Molecules, also known as is a distributor, supplier and manufacturers' representative of all types of Pharmaceuticals, Functional Ingredients, Excipients and Specialty Chemicals in Texas USA. Our principals manufacture supply and export USP NF BP, Ph Eur, etc grades of chemicals pure and reagent grade, mineral fortifiers, FCC food grade. Tailor made particle size and customized specifications are offered. The principal's facility is having one or more of the certifications like FDA approval and GLP, cGMP, ISO9001, ISO14001, ISO/IEC 17025, ISO22000, FSSC 22000, ISO45001, FSSAI, Kosher, HALAL, COPP, WHO-GMP certified and Written Confirmation (WC) for export to Europe is available. The manufacturers suppliers and exporters observe WHO Good Manufacturing Practices and Good Laboratory Practices.

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Suppliers and Manufacturers' Representative:
American Molecules - USA
9910 Bent Oak Dr
Houston, TX 77040, USA
Call Toll Free: 1-855-55-AMMOL 1-855-552-6665