Products Description of Sodium sulfide CAS#1313-82-2
Sodium sulfide has a chemical formula of Na₂S in its basic form, and its more common form is the hydrate Na₂S·9H₂O. Both the anhydrous and hydrated forms are colorless, water-soluble salts, and their aqueous solutions are strongly alkaline. When exposed to moist air, Na₂S and its hydrates release hydrogen sulfide—a gas with the characteristic smell of rotten eggs. Specifically, anhydrous sodium sulfide appears as a yellow to brick-red crystalline mass or fused solid.
Parameters
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 |
Odor | Rotten egg odor |
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
These yellow flakes are produced by fusing sodium carbonate with sulfur. Sodium sulfide dissolves easily in water but has low solubility in alcohol. Because it has a sulfurous odor, people who use it to tint photos or enhance negatives often call it "stinky" informally. Its applications are diverse: it is used in sulfur-containing dyes, and acts as a reducing agent, mordant, flotation agent, leather dehairing agent, papermaking additive—with additional uses in the textile, pigment, and rubber industries.
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