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Cupric oxide CAS#20427-59-2

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Chemical Name：Cupric oxide

CAS No.:20427-59-2

Molecular Formula：CuH2O2

Molecular weight:97.56

Sample: Available

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Product Details

Products Description of Cupric oxide CAS#20427-59-2

Chemical formula Cu(OH)2. Molecular weight 97.56. Blue to blue-green gel or light blue crystalline powder, toxic. Relative density 3.37. Color darkens at 60-80℃. Insoluble in cold water, decomposes into copper oxide in hot water, dissolves in acid to form divalent copper salt, dissolves in excess concentrated alkali to form tetrahydroxy cuprate, dissolves in concentrated ammonia or potassium cyanide solution to form dark blue tetraamminecopper(II) dihydroxide solution or colorless potassium tetracyanocuprate(II) solution. Add appropriate amount of ammonia to the hot copper salt solution under stirring, filter out the precipitate and wash it thoroughly with hot water, then boil it with 30℃ sodium hydroxide solution, filter and vacuum dry to obtain copper hydroxide. Used as a printing and dyeing mordant, papermaking colorant and as a raw material for preparing copper salt or copper ammonium solution for rayon.

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Cupric hydroxide Chemical Properties

density	3.4
vapor pressure	0Pa at 25℃
storage temp.	Inert atmosphere,2-8°C
solubility	H2O: insoluble(lit.)
form	Powder
color	Blue
PH	7.69(1 mM solution);7.69(10 mM solution);7.69(100 mM solution)
Water Solubility	Slightly soluble in waterSoluble in acids, ammonium hydroxide, dilute hydrochloric acid, concentrated alkali and potassium cyanide. Insoluble in water, ethanol, and acetone.
Sensitive	Hygroscopic
Merck	14,2642
Solubility Product Constant (Ksp)	pKsp: 19.66
Exposure limits	ACGIH: TWA 1 mg/m3 NIOSH: IDLH 100 mg/m3; TWA 1 mg/m3
Stability:	Stable, but hygroscopic. Store in dry conditions.
CAS DataBase Reference	20427-59-2(CAS DataBase Reference)
NIST Chemistry Reference	Copper hydroxide(20427-59-2)
EPA Substance Registry System	Cupric hydroxide (20427-59-2)

Safety Information

Hazard Codes	Xn,N,T
Risk Statements	22-37/38-41-50/53-23
Safety Statements	26-36-39
RIDADR	3262
WGK Germany	3
RTECS	GL7600000
TSCA	Yes
HS Code	28255000
Hazardous Substances Data	20427-59-2(Hazardous Substances Data)

Product Application of Cupric oxide CAS#20427-59-2

Raw materials for making copper salts, mordants, artificial silk, pigments, and coloring paper. Used as fungicides and components of antifouling paint for ship bottoms.

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