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Disodium sulfide

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Identification
Molecular formula
Na2S
CAS number
1313-82-2
IUPAC name
disodium;sulfide
State
State

Solid at room temperature. Disodium sulfide is typically found as a hygroscopic solid which can form hydrated compounds when in contact with moisture.

Melting point (Celsius)
1 180.00
Melting point (Kelvin)
1 453.15
Boiling point (Celsius)
920.00
Boiling point (Kelvin)
1 193.15
General information
Molecular weight
78.05g/mol
Molar mass
78.0450g/mol
Density
1.8560g/cm3
Appearence

Disodium sulfide generally appears as colorless to yellow flakes or lumps. In its pure form, it should be colorless, but due to impurity and exposure to moisture in the air, it often takes on a yellow appearance. It is hygroscopic, meaning it readily absorbs moisture from the air.

Comment on solubility

Solubility of Disodium Sulfide

Disodium sulfide (Na2S) exhibits interesting solubility characteristics that are important in various chemical contexts. When considering its solubility in water, we can note the following:

  • Highly Soluble: Disodium sulfide is known to be highly soluble in water. This property is attributed to the presence of the ionic disodium (Na+) and sulfide (S2-) ions, which readily interact with water molecules.
  • Ionization: Upon dissolving in water, disodium sulfide ionizes completely, producing sodium ions and sulfide ions: Na2S → 2Na+ + S2-.
  • pH Effects: The dissolution of disodium sulfide can result in a basic solution as sulfide ions can hydrolyze to produce hydroxide ions (OH-), leading to elevated pH levels.

It is important to consider that while disodium sulfide's solubility is remarkable, certain environmental factors such as temperature and concentration can impact its solubility further. Overall, its high solubility in water makes it an effective reagent in various chemical processes, particularly in metallurgy and wastewater treatment.

Interesting facts

Discovering Disodium Sulfide

Disodium sulfide is an intriguing chemical compound that offers a variety of uses and applications in both industrial and laboratory settings. As a salt composed of sodium ions and sulfide ions, it plays a significant role in the field of chemistry by contributing to various processes.

Key Applications

Some of the primary applications of disodium sulfide include:

  • Analytical Chemistry: Often used as a reagent in chemical analysis to detect metal ions due to its ability to form insoluble sulfides.
  • Pulp and Paper Industry: Serves as a crucial component in the kraft process for wood pulping, aiding in the breaking down of lignin.
  • Textile and Dyeing Industries: Utilized in the production of dyes and as a reducing agent in the textile finishing process.
  • Regeneration of Catalysts: Acts as a reducing agent for catalyst regeneration in various chemical reactions.

Caution and Handling

It is essential to handle disodium sulfide with care due to its potential hazards. When working with this compound, consider the following:

  • The compound can release toxic hydrogen sulfide gas when in contact with acids or moisture.
  • Proper personal protective equipment (PPE) should always be worn to minimize exposure.

"Safety first!" should be a guiding principle for students and researchers when experimenting with disodium sulfide.

Chemical Characteristics

One fascinating aspect of disodium sulfide is its ability to react with heavy metals, which can lead to the precipitation of metal sulfides. This characteristic not only underscores the compound's importance in environmental chemistry but also illustrates the intricate dance of chemical interactions.

Understanding disodium sulfide expands our knowledge of chemical compounds and emphasizes the importance of safe laboratory practices. Whether in industrial applications or educational settings, disodium sulfide presents a captivating intersection of chemistry and safety.

Synonyms
Sodium sulphide
Sodium sulfuret
sodium monosulphide
anh. sodium sulfide
CHEBI:76208
sodium sulfide (anh.)
anhydrous sodium sulfide
sodium sulfide anhydrous
sodium sulphide anhydrous
NSC-41874
YGR27ZW0Y7
Sodium Sufide
Ingrown Toenail Pain Relief Kit
SODIUM SULPHIDE, ANHYDROUS
SODIUM SULFIDE, (ANHYDROUS)
Scholls Wellness Company LLCIngrown Toenail
SODIUM SULFIDE, WITH LESS THAN 30% WATER OF CRYSTALLIZATION
SODIUM SULPHIDE, WITH LESS THAN 30% WATER OF CRYSTALLIZATION
215-211-5
disodium monosulfide
ec 215-211-5
einecs 215-211-5
na2s
nsc 41874
sodium monosulfide
sodium sulfide (anhydrous)
sodium sulfide, anhydrous
unii-ygr27zw0y7
disodium;sulfide
SODIUM SULFIDE [MI]
SODIUM SULFIDE [HSDB]
CHEMBL2107611
DTXSID0029636
SODIUM SULFIDE [WHO-DD]
GRVFOGOEDUUMBP-UHFFFAOYSA-N
AKOS025296074
AKOS030228234
DB11159
DB-321482
NS00075646