Basic information Description Safety Supplier Related
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Zinc hydroxide

Basic information Description Safety Supplier Related

Zinc hydroxide Basic information

Product Name:
Zinc hydroxide
Synonyms:
  • zincdihydroxide
  • zinchydroxide(zn(oh)2)
  • ZINC HYDROXIDE
  • znmc hydroxide
  • Zinc dihydoxide
  • Zinc hydroxide≥ 99% (Assay)
  • ZINC HYDROXIDE ISO 9001:2015 REACH
CAS:
20427-58-1
MF:
H2O2Zn
MW:
99.39
EINECS:
243-814-3
Product Categories:
  • Inorganics
Mol File:
20427-58-1.mol
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Zinc hydroxide Chemical Properties

Melting point:
125, decomposes [HAW93]
Density 
3.050
vapor pressure 
0Pa at 20℃
form 
colorless orthorhombic crystals
PH
8.88(1 mM solution);8.88(10 mM solution);8.88(100 mM solution)
Water Solubility 
slightly soluble H2O [HAW93]
Solubility Product Constant (Ksp)
pKsp: 16.5
Stability:
Stable.
CAS DataBase Reference
20427-58-1(CAS DataBase Reference)
EPA Substance Registry System
Zinc hydroxide (20427-58-1)
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Zinc hydroxide Usage And Synthesis

Description

Zinc hydroxide is a white solid that usually forms in solution. It is not very stable as a dried solid, therefore a standard of zinc hydroxide is not available commercially.
Zinc hydroxide Zn(OH)2 is an amphoteric chemical compound. Both bases and acids react with zinc hydroxide. It's an insoluble hydroxide that dissolves when exposed to a strong acid. It occurs naturally as the rare minerals Wulfingite, ashoverite and sweetite. Zinc hydroxide is used as a biological absorbant often.

Chemical Properties

Colorless crystals.Decomposes at 125C. Almost insoluble in water; forms both zinc salts and zincates.

Physical properties

Colorless orthorhombic crystals; density 3.053 g/cm3; decomposes at 125°C; slightly soluble in water.

Uses

Intermediate, absorbent in surgical dressings, rubber compounding.

Preparation

The compound is prepared by adding a strong alkali to a solution of zinc sulfate or chloride: ZnSO4 + 2NaOH → Zn(OH)2 + Na2SO4.

Zinc hydroxideSupplier

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