CAS 7446-20-0 Zinc sulfate heptahydrate - Analytical Products / Alfa Chemistry

CAT	AP7446200-B
CAS	7446-20-0
Structure
MDL Number	MFCD00149894
Molecular Weight	287.56
EC Number	231-793-3
InChI Key	RZLVQBNCHSJZPX-UHFFFAOYSA-L

Description	99.995% trace metals basis
Solubility	H2O: 965 g/L at 20 °C
Assay	99.995% trace metals basis
Form	powder, crystals or chunks
Linear Formula	ZnSO4 · 7H2O
Size	10G, 50G

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Case Study

Zinc Sulfate Heptahydrate for the Synthesis of Two Novel Zn(II) Carboxylates Containing Diazines

Dey, Dipankar, et al. Journal of Molecular Structure 1053 (2013): 127-133.

At room temperature, two inorganic-organic hybrid compounds, [Zn(3,5-O₂N-OBz)₂(bipy)] (1) and [Zn₂(3,5-O₂N-OBz)₄(O-phen)₂] (2), were synthesized using methanol-dimethylformamide as the medium and zinc sulfate heptahydrate (ZnSO₄·7H₂O) as the starting material.
Synthesis of [Zn(3,5-O₂N-OBz)₂(bipy)] (1)
0.287 g (1.0 mmol) of ZnSO₄·7H₂O was mixed with 0.424 g (2.0 mmol) of 3,5-dinitrobenzoic acid by solid-state grinding, and the mixture was heated in a water bath for 30 minutes. Then, 20 mL of methanol was used to extract the mixture, and the solution was filtered to remove any undissolved residue. A methanol solution of 5 mL containing 2,2'-bipyridine (0.156 g, 1.0 mmol) was added slowly to the resulting solution while stirring. The reaction mixture was stirred at room temperature for about 45 minutes, during which a white solid precipitated. This solid was dissolved in a minimum volume (~25 mL) of a MeOH-DMF mixture (1:1). The resulting homogeneous mixture was stirred for an additional hour, filtered to remove any undissolved impurities, and left to stand at room temperature for 4-5 days, resulting in the formation of single crystals suitable for X-ray diffraction studies.
Synthesis of [Zn₂(3,5-O₂N-OBz)₄(O-phen)₂] (2)
A homogeneous solid mixture of ZnSO₄·7H₂O (0.287 g, 1.0 mmol) and 3,5-dinitrobenzoic acid (0.424 g, 2.0 mmol) was obtained through grinding, and this mixture was heated in a water bath for about 30 minutes. The mixture was dissolved by adding 20 mL of methanol and then filtered to remove any undissolved impurities. A methanol solution of 1,10-phenanthroline (0.198 g, 1.0 mmol) was added dropwise to the filtrate (5 mL), and the mixture was stirred for about 30 minutes, resulting in the precipitation of a white solid. The precipitate was dissolved in 25 mL of a MeOH-DMF mixture (1:1), and the resulting homogeneous solution was stirred for an additional hour, filtered to remove undissolved residues, and left to stand in an open environment at room temperature for 4-5 days, resulting in the formation of pale yellow single crystals suitable for X-ray diffraction studies.

ZnSO₄·7H₂O as a Catalyst for the Synthesis of Highly Substituted Dihydro-2-oxopyrroles

Mohamadpour, F. (2018). ZnSO₄·7H₂O catalyzed one-pot and facile synthesis of highly substituted dihydro-2-oxopyrroles at room temperature. Makara Journal of Science, 22(2), 4.

A mild and straightforward catalytic method using ZnSO₄·7H₂O has been developed for the one-pot synthesis of highly substituted dihydro-2-oxopyrroles under mild reaction conditions. This method is economical and gentle, offering several advantages, including high yields, simplicity, low-cost and readily available catalysts, and high atom economy.
Experimental Procedure: A mixture of amine 1 (1.0 mmol) and dialkyl acetylene dicarboxylate 2 (1.0 mmol) was stirred in MeOH (3 mL) for 15 minutes. Next, amine 3 (1.0 mmol), formaldehyde 4 (1.5 mmol), and ZnSO₄·7H₂O (20 mol%) were added to the mixture, and the reaction was stirred for an appropriate time. After the reaction was complete, the mixture was filtered and separated using thin-layer chromatography (TLC). The recovered solid was washed with ethanol (3 times × 2 mL), yielding purified compounds 5a-q without the need for column chromatography. The catalyst is soluble in ethanol and can be removed from the reaction mixture.

Synthesis of ZnS Nanomaterials Using Na₂S·9H₂O and ZnSO₄·7H₂O Precursors

Hwang, Bo-Hee, et al. Ceramics International 42.10 (2016): 11700-11708.

ZnS can be used in a variety of applications, including optoelectronic, luminescent, and photonic devices. Therefore, it is one of the most important wide-bandgap II-VI semiconductors.
Experimental Steps
ZnSO₄·7H₂O and Na₂S·9H₂O were used as precursors for synthesizing ZnS. A mixture of water and varying amounts of ethylene nitrile (EN) [(100-x)H₂O-xEN, where 0.0 vol%≤x≤100 vol%] was used as the solvent. A portion (0.03 mol) of ZnSO₄·7H₂O powder was added to the solvent, followed by the addition of different amounts of Na₂S·9H₂O to the mixed solution, forming samples with an S/Zn ratio ranging from 0.5 to 3.0 (i.e., S=y:1.0, where 0.5≤y≤3.0). For example, a sample with an S/Zn ratio of 1.3 would be denoted as Zn₁.₃S.
The mixture was then stirred for 1 hour and placed in a container lined with polytetrafluoroethylene, filling the container to 40% of its capacity. The container was heated in an oven at various temperatures (120-220 °C) for different durations (0.5-36 hours). The product was then filtered, washed with distilled water, and dried at 80 °C for 12 hours.