Anhydrous
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Dihydrate
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Names | |
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IUPAC name
Copper(II) chloride
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Other names
Cupric chloride
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Identifiers | |
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3D model (JSmol)
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8128168 | |
ChEBI | |
ChEMBL | |
ChemSpider | |
DrugBank | |
ECHA InfoCard | 100.028.373 |
EC Number |
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9300 | |
PubChem CID
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RTECS number |
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UNII |
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UN number | 2802 |
CompTox Dashboard (EPA)
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Properties | |
CuCl2 | |
Molar mass | 134.45 g/mol (anhydrous) 170.48 g/mol (dihydrate) |
Appearance | dark brown solid (anhydrous) light blue solid (dihydrate) |
Odor | odorless |
Density | 3.386 g/cm3 (anhydrous) 2.51 g/cm3 (dihydrate) |
Melting point | 630 °C (1,166 °F; 903 K) (extrapolated) 100 °C (dehydration of dihydrate) |
Boiling point | 993 °C (1,819 °F; 1,266 K) (anhydrous, decomposes) |
70.6 g/(100 mL) (0 °C) 75.7 g/(100 mL) (25 °C) 107.9 g/(100 mL) (100 °C) | |
Solubility | methanol: 68 g/(100 mL) (15 °C)
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+1080·10−6 cm3/mol | |
Structure[1][2] | |
monoclinic (β = 121°) (anhydrous) orthorhombic (dihydrate) | |
C2/m (anhydrous) Pbmn (dihydrate) | |
a = 6.85 Å (anhydrous)
7.41 Å (dihydrate), b = 3.30 Å (anhydrous) 8.09 Å (dihydrate), c = 6.70 Å (anhydrous) 3.75 Å (dihydrate) | |
Octahedral | |
Hazards | |
GHS labelling: | |
Danger | |
H301, H302, H312, H315, H318, H319, H335, H410, H411 | |
P261, P264, P270, P271, P273, P280, P301+P310, P301+P312, P302+P352, P304+P340, P305+P351+P338, P310, P312, P321, P322, P330, P332+P313, P337+P313, P362, P363, P391, P403+P233, P405, P501 | |
NFPA 704 (fire diamond) | |
Flash point | Non-flammable |
NIOSH (US health exposure limits): | |
PEL (Permissible)
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TWA 1 mg/m3 (as Cu)[3] |
REL (Recommended)
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TWA 1 mg/m3 (as Cu)[3] |
IDLH (Immediate danger)
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TWA 100 mg/m3 (as Cu)[3] |
Safety data sheet (SDS) | Fisher Scientific |
Related compounds | |
Other anions
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Copper(II) fluoride Copper(II) bromide |
Other cations
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Copper(I) chloride Silver chloride Gold(III) chloride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Copper(II) chloride, also known as cupric chloride, is an inorganic compound with the chemical formula CuCl2. The monoclinic yellowish-brown anhydrous form slowly absorbs moisture to form the orthorhombic blue-green dihydrate CuCl2·2H2O, with two water molecules of hydration. It is industrially produced for use as a co-catalyst in the Wacker process.
Both the anhydrous and the dihydrate forms occur naturally as the rare minerals tolbachite and eriochalcite, respectively.