Sodium Sulfide CAS#1313-82-2
Strong alkalinity ： Sodium sulfide and its hydrates produce strongly alkaline solutions.
Water solubility ： Both anhydrous and hydrated forms are soluble in water.
Versatile industrial use ： Its chemical reactivity makes it useful in various industrial applications.
Distinctive physical forms ： Available as colorless salts, yellow to brick-red crystalline mass, or fused solid, allowing flexibility in handling and processing.
Product Description: Sodium sulfide is a chemical compound with the formula Na₂S, and it is often encountered in its hydrated form Na₂S·9H₂O. Both forms are colorless, water-soluble salts that produce strongly alkaline solutions. When exposed to moisture in the air, Na₂S and its hydrates release hydrogen sulfide gas, which has a characteristic rotten egg odor. Anhydrous sodium sulfide appears as a yellow to brick-red crystalline solid or fused mass. Upon exposure to moisture, it can absorb water from the air, leading to spontaneous heating and potential ignition of nearby flammable materials. Industrial-grade sodium sulfide typically exhibits pink, reddish-brown, or yellowish-brown coloration due to the presence of impurities.
Sodium sulfide Chemical 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/nmb/nmc/nmα/oβ/oγ/oV/nm30.6540.6540.6549090900.2797 |
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 |
CAS DataBase Reference | 1313-82-2(CAS DataBase Reference) |
NIST Chemistry Reference | Sodium sulfide(1313-82-2) |
EPA Substance Registry System | Sodium sulfide (1313-82-2) |
Safety Information
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 |
Hazardous Substances Data | 1313-82-2(Hazardous Substances Data) |
Product Application of Sodium Sulfide CAS#1313-82-2
Sodium sulfide (Na₂S) finds applications across multiple industries:
Medical Research: Used in H₂S studies to investigate its effects on diabetes prevention in animal models.
Dye and Textile Industry: Functions in the production of sulfur dyes, as a reducing agent, and as a mordant.
Metallurgy and Mining: Employed in the oxidation of gold, lead, and copper ores and as a flotation agent.
Paper, Leather, and Rubber Processing: Used as a depilatory for leather, a digestion aid in paper-making, and in pigment and rubber treatments.
