Description

Sodium Sulfide Pentahydrate is a versatile inorganic salt widely used as a key reducing agent and sulfur source in industrial processes. Its commercial importance stems from its ability to facilitate critical chemical reactions, including the precipitation of heavy metals and the synthesis of sulfur-containing compounds. This product is essential for manufacturers in sectors such as leather processing, textile dyeing, pulp and paper production, and water treatment.

Application

• Leather Processing: Acts as a depilatory agent for hair removal and a reducing agent in the tanning process.
• Textile Industry: Used as a reducing agent in sulfur dyeing and as a desulfurizing agent for synthetic fibers.
• Pulp and Paper Manufacturing: Employed in the kraft process for digesting wood pulp and as a bleaching agent.
• Water Treatment: Precipitates heavy metal ions (e.g., copper, lead) from industrial wastewater.
• Chemical Synthesis: Serves as a sulfur source for producing other sulfur compounds like sodium hydrosulfide and thioorganic chemicals.
• Mining & Metallurgy: Utilized in ore flotation processes and as a reducing agent in metal extraction.
• Dye Manufacturing: A key intermediate in the production of sulfur dyes and other colorants.

Basic Information

Product Name	Sodium Sulfide Pentahydrate
CAS No.	1313-83-3
Molecular Formula	Na2S·5H2O
Molecular Weight	240.18 g/mol
Synonyms	Sodium Sulfide 5-Hydrate; Disodium Sulfide Pentahydrate; Sodium Monosulfide Pentahydrate; Sulfurated Sodium Pentahydrate; Sodium Sulfide (Na2S) Pentahydrate; Sodium Sulfide Flake; Sulfur Black Base
EINECS	215-211-5

Quality Control

Our Sodium Sulfide Pentahydrate is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high performance. We adhere to relevant industrial standards, and our quality assurance includes comprehensive testing for purity, assay, and physical parameters. A Certificate of Analysis (COA) is provided with each shipment to guarantee compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area away from incompatible materials such as strong acids and oxidizing agents. Due to its hygroscopic and easily oxidized nature, it is recommended to store under an inert atmosphere for long-term preservation and to minimize moisture absorption. Keep container tightly sealed when not in use.

Specification

Item	Specification
Appearance	Yellow flakes or crystals
Identification (IR)	Conforms
Assay (as Na2S·5H2O)	≥ 60.0%
Iron (Fe)	≤ 0.003%
Water Insoluble Matter	≤ 0.05%
Sodium Carbonate (Na2CO3)	≤ 2.0%
Sodium Thiosulfate (Na2S2O3)	≤ 1.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.