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Zinc sulfate
Zinc Sulfate.jpg
Zinc sulfate.png
IUPAC name
Other names White vitriol
CAS number 7733-02-0 Yes check.svgY,
7446-19-7 (monohydrate)
13986-24-8 (hexahydrate)
7446-20-0 (heptahydrate)
PubChem 24424
EC number 231-793-3
UN number 3077
RTECS number ZH5260000
Molecular formula ZnSO4
Molar mass 161.47 g/mol (anhydrous)
179.47 g/mol (monohydrate)
287.53 g/mol (heptahydrate)
Appearance white powder
Odor odorless
Density 3.54 g/cm3 (anhydrous)
2.072 g/cm3 (hexahydrate)
Melting point

680 ºC decomp. (anhydrous)
100 °C (heptahydrate)
70 °C, decomp (hexahydrate)

Boiling point

740 °C (anhydrous)
280 °C, decomp (heptahydrate)

Solubility in water 22 g/100 ml, anhydrous (20 ºC)
96.5 g/100mL, heptahydrate (20 °C)
Solubility anhydrous:
soluble in methanol, glycerol
40 g/100 mL, glycerol
insoluble in alcohol
Refractive index (nD) 1.658 (anhydrous)
1.4357 (heptahydrate)
EU Index 030-006-00-9
EU classification Harmful (Xn)
Dangerous for the environment (N)
R-phrases R22, R41, R50/53
S-phrases (S2), S22, S26, S39, S46, S60, S61
Flash point Non-flammable
Related compounds
Other cations Cadmium sulfate
Related compounds Copper(II) sulfate
 Yes check.svgY (what is this?)  (verify)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Zinc sulfate (ZnSO4) is a colorless crystalline, water-soluble chemical compound. The hydrated form, ZnSO4·7H2O, the mineral goslarite, was historically known as "white vitriol" and can be prepared by reacting zinc with aqueous sulfuric acid. It may also be prepared by adding solid zinc to a copper(II) sulfate solution.

Zn + CuSO4 → ZnSO4 + Cu

It is used to supply zinc in animal feeds, fertilizers, and agricultural sprays. ZnSO4·7H2O is used in making lithopone, in coagulation baths for rayon, in electrolytes for zinc plating, as a mordant in dyeing, as a preservative for skins and leather and in medicine as an astringent and emetic. [1] [2] [3]

Another natural form of this heptahydrate is known as mineral Zinc-melanterite (Zn,Cu,Fe)SO4·7H2O (structurally different from goslarite). Lower hydrates of zinc sulfate are rarely found in nature as minerals: bianchite (Zn,Fe)SO4·6H2O, boyleite (Zn,Mg)SO4·4H2O and gunningite (Zn,Mn)SO4·H2O.

An aqueous solution of zinc sulfate is claimed to be effective at removing moss from roofs. Spraying a mixture on moss will allow the wind to simply blow off the remaining debris, however it is not recommended for use on lawns as it is as effective at removing grass. [4] Zinc sulfate was once used in home acne remedies.


  1. ^ "ICSC (International Chemical Safety Cards) 1698 ZINC SULFATE". Centers for Disease Control.  
  2. ^ "Burns, Gilbert's, Parasites, Stomatitis, Trichomoniasis, ...". National Institutes of Health.  
  3. ^ "CAMEO Chemical data sheet for ZINC SULFATE". National Oceanic and Atmospheric Administration.  
  4. ^ From [1] "If zinc sulfate comes into contact with neighboring plants, damage may occur. Plants and shrubbery should be draped when this chemical is being used."

Simple English

Zinc sulfate

Zinc sulfate is a chemical compound. Its chemical formula is ZnSO4. It contains zinc and sulfate ions.



Zinc sulfate is a colorless solid. It dissolves in water. It can react with bases to make zinc hydroxide.


Zinc sulfate can be made by reacting zinc or zinc oxide with sulfuric acid. It can also be made by reacting copper sulfate with zinc.


Zinc sulfate can be used to add zinc to the soil. It is also used to add zinc to animal feed. It was once used to remove acne.

See also


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