Nomenclature
CAS number: 7447-39-4
Copper chloride (CuCl
2); copper(II) chloride.
Cl
2Cu; mol wt 134.45.
Cl 52.74%, Cu 47.26%.
CuCl
2.
Description and references
Prepn: Pray, Inorg.
Synth. 5, 153 (1957); Gmelins, Copper (8th ed.) 60B, 253-295 (1958);
Glemser, Sauer in Handbook of Preparative
Inorganic Chemistry vol. 2, G. Brauer, Ed.
(Academic Press, New York, 2nd ed., 1965) p 1008.
Properties
Yellow to brown, deliquesc, hygroscopic microcryst
powder. Partially dec above 300° to CuCl + Cl2. mp (extrapolated) 630°. mp of 498° usually
reported for this compd is the melting pt of a mixture of CuCl2 and CuCl. d425 3.39. Corrosive. Forms the dihydrate in moist air. Sol in water, alc, acetone.
Keep well closed.Derivative
Dihydrate.
Nomenclature
CAS number: 10125-13-0
CuCl
2.2H
2O; mol wt 170.48.
Cu 37.27%, Cl 41.59%, H 2.36%, O 18.77%.
Properties
Green to blue powder or orthorhombic, bipyramidal
crystals. Deliquesc in moist air, efflorescent in dry air. Water
loss occurs from 70-200°: Bell, Coultard, J. Chem. Soc. A 1968, 1417. mp ≈100°; d 2.51. Freely sol in water, methanol, ethanol;
moderately sol in acetone, ethyl acetate; slightly sol in ether.
The aq soln is acid to litmus; pH of 0.2 molar soln 3.6.Caution
Potential symptoms of overexposure
may include irritation of skin, eyes, and respiratory tract.Use
As catalyst for organic and inorganic reactions;
in petroleum industry as deodorizing, desulfurizing, and purifying
agent; as mordant for dyeing and printing textiles; as oxidizing agent
for aniline dyestuffs; in indelible, invisible and laundry-marking
inks; in metallurgy in wet process for recovering mercury from ores,
in refining Cu, Ag, Au; in tinting-baths for Fe, Sn; in electrotyping
baths for plating Cu on Al; in analytical chemistry for testing for
Mo; in photography as a fixer, desensitizer and reagent; in producing
color in pyrotechnic compositions; in manuf of acrylonitrile, fast
black (melanin); in pigments for glass, ceramics; as feed-additive,
wood preservative, disinfectant.