Silver sulfide , 99.9%metalsbasis , 21548-73-2

Synonym(s):
Silver sulfide

CAS NO.：21548-73-2

Empirical Formula: Ag2S

Molecular Weight: 247.8

MDL number: MFCD00003406

EINECS: 244-438-2

PRODUCT Properties

• Melting point: 845 °C (lit.)
• Boiling point: decomposes [HAW93]
• 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
• Specific Gravity: 7.317
• color: Light yellow
• Water Solubility: Soluble in HNO{3}, alkali cyanide solutions. Insoluble in water
• Sensitive: Light Sensitive
• Merck: 14,8530
• crystal system: Monoclinic
• Space group: P21/n
• Solubility Product Constant (Ksp): pKsp: 49.20
• Lattice constant:
  • a/nm: 0.423
  • b/nm: 0.691
  • c/nm: 0.787
  • α/o: 90
  • β/o: 99.58
  • γ/o: 90
  • V/nm3: 0.2268
• Stability: Stable. Incompatible with acids, strong oxidizing agents.
• CAS DataBase Reference: 21548-73-2(CAS DataBase Reference)
• EPA Substance Registry System: Silver sulfide (21548-73-2)

Description and Uses

Silver sulfide is a brownish back powder formed by the combination of an alkaline sulfide with silver. It is a very stable compound made when toning silver-based images in sulfides. It is soluble in sulfuric and nitric acids but insoluble in water and alcohol.

Safety

• Symbol(GHS): GHS07
• Signal word: Warning
• Hazard statements: H315-H319-H335
• Precautionary statements: P261-P264-P271-P280-P302+P352-P305+P351+P338
• Hazard Codes: Xi
• Risk Statements: 36/37/38
• Safety Statements: 26-36
• WGK Germany: 3
• F: 8
• TSCA: Yes
• HazardClass: 9
• HS Code: 28432900