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Zinc Chloride - Chemical Identification

IUPAC name Zinc Chloride
Other Names Zinc(II) chloride,
zinc dichloride,
butter of zinc,
Zinc butter
CAS Number [7646-85-7]
RTECS Number ZH1400000
Molecular Formula ZnCl2
Molar Mass 136.315 g/mol
Appearance White Crystalline Solid
Density 2.907 g/cm³, solid
Melting Point 290 °C (554 K)
Boiling Point 732 °C (1350 K)
Solubility In Water 432 g/100 mL (25 °C)
Crystal Structure Four forms known Hexagonal
close-packed (δ) is the only
stable form when anhydrous.
Coordination Geometry Tetrahedral, 4-coordinate,
linear in the gas phase.
MSDS External MSDS
EU Classification Irritant (I), Corrosive(C)
R-Phrases R34, R50, R53
S-Phrases S7/8, S28, S45, S60, S61
Related Compounds
Other Anions Zinc fluoride,
zinc bromide,
zinc iodide
Other Cations Copper(II) chloride, cadmium chloride
Except where noted otherwise, data are given for materials
in their standard state (at 25 °C, 100 kPa)
Infobox disclaimer and references.