Product Description

Zinc sulfate; White vitriol, also known as alum, jarosite, is colorless or white orthorhombic crystal or powder at room temperature. It has astringency and is easily soluble in water. The aqueous solution is acidic and slightly soluble in ethanol and glycerol. The pure zinc sulfate does not turn yellow when it is stored in air for a long time, and becomes white powder when it loses water in dry air. There are many kinds of hydrate: in the range of ***9 ℃, the stable hydrate in equilibrium with water is zinc sulfate heptahydrate, in the range of ****0 ℃, it is zinc sulfate 6H2O, and in the range of *****0 ℃, it is zinc sulfate monohydrate. When heated to **0 ℃, all the hydrates lose crystal water completely, decompose to zinc oxysulfate at **0 ℃, further decompose above **0 ℃, and finally decompose to zinc oxide and sulfur trioxide at **0 ℃. ZnSO4 · 7H2O and mso4 · 7H2O (M = mg, Fe, Mn, Co, Ni) form mixed crystals in a certain range. It is mainly used as raw material for making pigment lithopone, lithopone and other zinc compounds. It is also used as nutrient for animals in zinc deficiency, feed additive for animal husbandry, zinc fertilizer for crops (microelement fertilizer), important material for man-made fiber, electrolyte for electrolytic production of metallic zinc, mordant, medical emetic, astringent, fungicide, etc Wood and leather preservatives, etc. It is obtained by the reaction of zinc or zinc oxide with sulfuric acid or by the extraction of sphalerite after roasting in reverberatory furnace