Description

Potassium Tetrasulfide (CAS No. 12136-49-1) is an inorganic polysulfide compound of significant industrial utility. It serves as a versatile sulfur source and reducing agent in various chemical synthesis and material processing applications. This product is essential for manufacturers and R&D facilities in sectors such as specialty chemicals, lubricant additives, and battery materials.

Application

• As a key intermediate in the synthesis of organic polysulfides and sulfur-containing polymers.
• In the formulation of extreme-pressure (EP) additives and solid lubricants for industrial applications.
• As a sulfur source and reducing agent in the preparation of metal sulfide nanoparticles and thin films.
• In analytical chemistry as a reagent for specific qualitative tests.
• For research and development in next-generation battery technologies, particularly sulfur-based cathodes.
• In the vulcanization process of certain specialty elastomers.

Basic Information

Product Name	Potassium Tetrasulfide
CAS No.	12136-49-1
Molecular Formula	K2S4
Molecular Weight	206.40 g/mol
Synonyms	Dipotassium Tetrasulfide; Potassium Polysulfide (K2S4); Tetrapotassium Octasulfide (common representation); Sulfurated Potash (related mixture); Potassium Sulfide (S4); Dipotassium Tetrasulfanediide; K2S4
EINECS	235-259-9

Quality Control

Our Potassium Tetrasulfide is produced and handled under strict quality protocols to ensure batch-to-batch consistency and reliability. The product undergoes rigorous analytical testing, including assay and impurity profiling. A Certificate of Analysis (COA) detailing purity, physical characteristics, and safety data is provided with each shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area under an inert atmosphere (e.g., nitrogen or argon) to prevent oxidation. Keep away from strong acids, strong oxidizing agents, and moisture. Recommended storage temperature: 15-25°C.

Specification

Item	Specification
Appearance	Yellow to reddish-brown crystalline solid or lumps
Identification (IR)	Conforms
Assay (as K2S4)	≥ 95.0 %
Water Content (KF)	≤ 1.0 %
Sulfide Species Profile	By Titration
Insoluble Matter	≤ 0.5 %

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