Sodium sulfide , 95% , 1313-82-2

Synonym(s):
Disodium sulfide

CAS NO.：1313-82-2

Empirical Formula: Na2S

Molecular Weight: 78.04

MDL number: MFCD00003498

EINECS: 215-212-0

PRODUCT Properties

• Melting point: 950 °C(lit.)
• Density: 1.86 g/mL at 25 °C(lit.)
• storage temp.: Refrigerator (+4°C)
• solubility: H₂O: 0.1 g/mL, clear, colorless
• form: flakes
• color: Yellow
• Specific Gravity: 1.856
• Water Solubility: 186 g/L (20 ºC)
• Sensitive: Hygroscopic
• Crystal Structure: Reverse CaF2 type
• crystal system: Cube
• Merck: 14,8681
• Space group: Fm3m
• Lattice constant:
  • a/nm: 0.654
  • b/nm: 0.654
  • c/nm: 0.654
  • α/o: 90
  • β/o: 90
  • γ/o: 90
  • V/nm3: 0.2797
• Dielectric constant: 5.0（Ambient）
• Stability: Spontaneously flammable. Incompatible with acids, metals, oxidizing agents. Contact with acid liberates toxic gas. Fine dust/air mixtures are explosive. Hygroscopic.
• InChIKey: CXPWOVUZRAFMDA-UHFFFAOYSA-N

Description and Uses

These yellow flakes were made by fusing sodium carbonate with sulfur. Soluble in water but less so in alcohol, sodium sulfide was lovingly called “stink” by those who used it for toning prints or intensifying negatives because of its sulfurous smell.

Safety

• Symbol(GHS): GHS02,GHS05,GHS06,GHS09
• Signal word: Danger
• Hazard statements: H251-H290-H301+H311-H314-H400
• Precautionary statements: P235-P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338
• Hazard Codes: C,N,Xn
• Risk Statements: 31-34-50-22
• Safety Statements: 26-45-61-36/37/39
• RIDADR: UN 1849 8/PG 2
• WGK Germany: 2
• RTECS: WE1905000
• F: 3-8-9-23
• TSCA: Yes
• HazardClass: 4.2
• PackingGroup: II
• HS Code: 28301010