COPPER(II) SULFIDE Chemical Properties

Melting point:

220 °C (dec.) (lit.)

Density 

4.6 g/mL at 25 °C (lit.)

refractive index 

1.45

solubility 

insoluble in H2O, ethanol, dilacid, alkaline solutions

form 

powder

color 

Black

Specific Gravity

4.6 (20℃)

Water Solubility 

Soluble in nitric acid, ammonium hydroxide, potassium cyanide. Insoluble in water, ethanol, hydrochloric acid ,dilute acids, sulfuric acid, alkali cyanides, aqueous ammonia and alkaline solutions.

Sensitive 

Air & Moisture Sensitive

Merck 

14,2965

crystal system

Six sides

Space group

P63/mmc

Solubility Product Constant (Ksp)

pKsp: 35.2

Lattice constant

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.37938	0.37938	1.6341	90	90	120	0.2037

Exposure limits

ACGIH: TWA 1 mg/m3
NIOSH: IDLH 100 mg/m3; TWA 1 mg/m3

Stability:

Stable, but may be moisture senstive. Incompatible with strong acids, strong oxidizing agents.

CAS DataBase Reference

1317-40-4(CAS DataBase Reference)

EPA Substance Registry System

Copper sulfide (CuS) (1317-40-4)

Safety Information

Safety Statements 

22-24/25

WGK Germany 

3

RTECS 

GL8912000

TSCA 

Yes

HS Code 

2830908500

Hazardous Substances Data

1317-40-4(Hazardous Substances Data)

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

COPPER(II) SULFIDE Usage And Synthesis

Chemical Properties

Copper(II) sulfide, CuS, [1317-40-4], MW 95.6, occurs in nature as the blue-black mineral covellite, [19138-68-2]. It is insoluble in water but is decomposed by nitric acid. In moist air, it is oxidized to copper(II) sulfate. The rate of oxidation is accelerated in the presence of alkali. Copper(II) sulfide is used as an antifouling pigment and in the preparation of aniline black dyes.

Uses

Copper(II) sulfide is used in antifouling paints, mixed catalysts and to develop aniline black dyes in textile printing. Further, it is used as a varnish pigment and an oxidizing agent. In addition, it is used as a component of solid state electrodes and thin-film solar cell with cadmium sulfide. It is a moderate conductor of electricity and used in photovoltaics.

Uses

In antifouling paints; in preparation of mixed catalysts; in development of aniline black dye in textile printing.

Preparation

Copper(II) sulfide is prepared by heating copper(I) sulfide in the presence of excess sulfur in a hydrogen atmosphere. Ethanol solutions of anhydrous copper(II) chloride precipitate the copper(II) sulfide on the addition of hydrogen sulfide.

Definition

ChEBI: Copper(II) sulfide is a copper sulfide in which the metal is in the +2 oxidation state.

General Description

Cu63 NMR, X ray photoelectron spectroscopy,2 copper sulfide CuS was studied in detail.

Hazard

Toxic by ingestion.

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