Copper Hydroxide

Alternate Names: Copper(II) hydroxide, Copper Hydrate, Cupric Hydroxide

Oxide	Analysis	Formula
CuO	81.53%	1.00
H2O	18.46%	n/a
Oxide Weight		79.54
Formula Weight		97.55

Notes

CAS 20427-59-2
This is less reactive than copper carbonate basic and more reactive than cupric oxide (CuO). This material does not contribute to CO2 bubbling in glazes.

Copper Hydroxide has a fairly complex decomposition as it is heated to melting point. Around 185C it loses about 18% weight as it decomposes to the heat stable CuO (cupric oxide) which remains stable until 1000C. Around 1050C about 6.5% is lost, likely involving partial loss of oxygen to form a mix of cuprous and cupric oxides.

Please check the accompanying curve to see the history of weight loss as this is fired (courtesty of Bob Hickerson, World Metal, LLC). You can see how much weight it lost, where it occurs and how fast it happens. Compare this with Copper Carbonate Basic to see the difference.

Related Information

Copper

Copper In Calcite

Copper Phosphate2

TGA/DTA curve showing weight loss over temperature range

Links

Materials	Copper Carbonate A source of CuO copper oxide used in ceramic glazes to produce a variety of colors (used only or with other colorants).
Materials	Copper Carbonate Basic This form of copper carbonate is the article of commerce, a mixture of theoretical copper carbonate and copper hydroxide.
Materials	Mysorine
Temperatures	Copper hydroxide decomposes to CuO (185-)
Hazards	Copper Compounds Toxicology
Typecodes	Colorant Metallic based materials that impart fired color to glazes and bodies.
URLs	http://en.wikipedia.org/wiki/Copper(II)_hydroxide Copper Hydroxide at Wikipedia

Data

TGA	See accompanying chart picture

By Tony Hansen
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