Zinc Sulfate (Monohydrate)

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Zinc Sulfate (monohydrate), in the past called "white vitriol," is used as a drier for oil paint and drying oils, such as in English Patent Drier.

Zinc Sulfate is a white crystalline, water-soluble compound. The hydrated form, zinc sulfate heptahydrate, the mineral goslarite, was historically known as "white vitriol" and can be prepared by reacting zinc with aqueous sulfuric acid. Zinc sulfate heptahydrate is used in making lithopone, as a mordant in dyeing, as a preservative for skins and leather and in medicine as an astringent and emetic. Monohydrate or anhydrous zinc sulfate is used as a drier for oil paint and drying oils, such as in English Patent Drier.

Pale Drying Oil Recipe

A pale drying oil was made as follows:

Boil 1 quart linseed oil and 2 ounces powdered calcined white vitriol (zinc sulfate monohydrate) with 1 quart water, until the water evaporates; allow to settle and decant.

Typical Properties
Chemical Name: Zinc Sulfate (monohydrate)
Chemical Formula: ZnSO4•H2O
CAS No.: 7446-19-7
Mesh (%): 90% 100 mesh
Color: White crystalline powder


Keep in a tightly closed container, stored in a cool, dry, ventilated area. Protect against physical damage. Material dissolves in water to form an acidic solution. Containers of this material may be hazardous when empty since they retain product residues (dust, solids); observe all warnings and precautions listed for the product.

Health and Safety


Do not ingest. Do not breathe dust. Wear protective gloves and clean body-covering clothing. Use chemical safety goggles and/or a full face shield where splashing is possible. Refer to Material Safety Data Sheet.

Environmental Hazards

Very toxic to aquatic organisms; may cause long term adverse effects in the aquatic environment. If product is spilled, comply with Federal, State and local regulations on reporting spills. Refer to Material Safety Sheet and labels for further details.

More Information
BrandRublev Colours
VendorNatural Pigments
Processing TimeUsually ships the next business day.
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Zinc Sulfate (Monohydrate)
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