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Zinc chloride (CAS 7646-85-7)
Zinc chloride is the name of chemical compounds with the formula ZnCl2 and its hydrates. Zinc chlorides, of which nine crystalline forms are known, are colorless or white, and are highly soluble in water. This white salt is hygroscopic and even deliquescent. Samples should therefore be protected from sources of moisture, including the water vapor present in ambient air. Zinc chloride finds wide application in textile processing, metallurgical fluxes, and chemical synthesis. No mineral with this chemical composition is known aside from the very rare mineral simonkolleite, Zn5(OH)8Cl2·H2O.
Information
Industries: Fertilizers, Horticulture
CAS number: 7646-85-7
WE number: 231-592-0
Index number: 030-003-00-2
Chemical formula: ZnCl2
Molar mass: 136,286 g/mol
ADR: UN2331
Other physical properties
pH: appr 5 (100g/l H2O w 20°c)
Melting / freezing point: 287°C (1013 hPa)
Boiling point / range: 732°C
Relative density: 2,93 g/cm3
Solubility in water: 851 g/l (20°C)
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