Reagent Grade Silver(I) Sulfide with CAS No. 21548-73-2

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Delivery Time: 20-30 Days

Basic Info

Model No.: SY-21548-73-2

Appearance: Powder

Grade Standard: Reagent Grade

CAS: 21548-73-2

Grade: Reagent Grade

Application: General Reagent

Purity: 99% Min

Sample: Free Sample With Freight Collect

Delivery: Fast Delivery

Form: Powder

Color: Light Yellow

Quality: Top Grade

Melting Point: 845 °C(lit.)

Additional Info

Packaging: 25KGS/Bag

Productivity: 1000MT/Month

Brand: Shenyu

Transportation: Ocean,Land,Air, Rail Way

Place of Origin: China

Supply Ability: 1000MT/Month

Port: China Port,Qingdao Port,Tianjin Port

Product Description

Reagent Grade Silver(I) Sulfide with CAS No. 21548-73-2

Product Overview

Gray-black powder. The density is 6.85 ~ 7.23. The temperature of 825 ° C. Decompose at the boiling point. Do not dissolve in water, soluble in concentrated sulfuric acid and nitric acid, and soluble in potassium cyanide and sodium cyanide solution. Used in black gold inlays and ceramics. It is prepared by mixing and filtering sodium sulfide and a silver nitrate solution. The resistance of silver sulfide is different from that of metal. As the temperature rises, its resistance decreases, that is, the conductivity is enhanced.
There are twin crystal structures:
Gray-black orthorhombic silver sulfide. The density is 7.326 g/cm3. 175 °C is the transition point. Soluble in potassium cyanide, concentrated sulfuric acid, nitric acid, insoluble in water.
Black cubic crystal silver sulfide. The density is 7.317 g/cm3. The temperature of 825 ° C. Soluble in potassium cyanide, acid.

Reagent Grade Silver Sulfide

Physical Properties

CAS No: 21548-73-2
Molecular formula: Ag2S
Molecular weight: 247.8
EINECS number: 244-438-2
Melting point 845 °C (lit.)
Density 7.234 g/mL at 25 °C (lit.)
Solubility Soluble in aq. HCN, aq. citric acid with KNO3. Insoluble in acids, alkalies, aqueous ammoniums.
Form Powder
Color Light yellow
Water solubility Soluble in HNO{3}, alkali cyanide solutions. Insoluble in water
Sensitivity Light Sensitive


Used as an analytical reagent
Determination of sulfur, oxygen, bromine, and iodide ions in the soil. alloy. Making pottery.

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