COPPER(II) SULFIDE

Synonym(s):Copper Blue;Copper monosulfide;Cupric sulfide;Horace Vernet′s Blue

CAS NO.：1317-40-4
Empirical Formula: CuS
Molecular Weight: 95.61
MDL number: MFCD00016066
EINECS: 215-271-2
SAFETY DATA SHEET (SDS)
Update Date: 2024-09-04 23:37:13

What is COPPER(II) SULFIDE?

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.

The Uses of COPPER(II) SULFIDE

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.

The Uses of COPPER(II) SULFIDE

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

Definition

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

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.

General Description

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

Hazard

Toxic by ingestion.

Properties of COPPER(II) SULFIDE

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
Solubility Product Constant (Ksp)	pKsp: 35.2
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)