| Identification | More | [Name]
ZINC HYDROXIDE | [CAS]
20427-58-1 | [Synonyms]
ZINC HYDROXIDE
zincdihydroxide
zinchydroxide(zn(oh)2)
znmc hydroxide
Zinc dihydoxide | [EINECS(EC#)]
243-814-3 | [Molecular Formula]
H2O2Zn | [MDL Number]
MFCD00049620 | [Molecular Weight]
99.4 | [MOL File]
20427-58-1.mol |
| Chemical Properties | Back Directory | [Appearance]
Colorless crystals.Decomposes
at 125C. Almost insoluble in water; forms
both zinc salts and zincates. | [Melting point ]
125, decomposes [HAW93] | [density ]
3.050 | [vapor pressure ]
0Pa at 20℃ | [form ]
colorless orthorhombic crystals | [color ]
colorless orthorhombic crystals, crystalline | [PH]
8.88(1 mM solution);8.88(10 mM solution);8.88(100 mM solution) | [Stability:]
Stable. | [Water Solubility ]
slightly soluble H2O [HAW93] | [Solubility Product Constant (Ksp)]
pKsp: 16.5 | [LogP]
-1.380 (est) | [Uses]
Intermediate, absorbent in surgical dressings,
rubber compounding. | [CAS DataBase Reference]
20427-58-1(CAS DataBase Reference) | [EPA Substance Registry System]
20427-58-1(EPA Substance) |
| Hazard Information | Back Directory | [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. | [Preparation]
The compound is prepared by adding a strong alkali to a solution of zinc sulfate or chloride: ZnSO4 + 2NaOH → Zn(OH)2 + Na2SO4. |
| Questions And Answer | Back Directory | [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. |
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