Sodium 3-[[(dimethylamino)thioxomethyl]thio]propanesulphonate CAS 18880-36-9

Description

Sodium 3-[[(dimethylamino)thioxomethyl]thio]propanesulphonate (CAS 18880-36-9), often abbreviated as DPS, is a specialized chemical compound. It is typically encountered as a white to yellowish powder. This compound is recognized for its utility in various industrial applications, particularly in electroplating processes where it functions as a brightener and stabilizer. Its unique molecular structure, incorporating both thioether and sulfonate groups, contributes to its efficacy in these roles. While primarily used in industrial settings, it is also noted for its applications as a pharmaceutical intermediate and in biochemical research.

Properties

Property	Value
CAS Number	18880-36-9
Molecular Formula	C6​H12​NNaO3​S3​
Molecular Weight	265.35 g/mol
Appearance	White to yellowish powder or luster white flake crystal
Purity	Typically $\ge 98\%$ or $\ge 99\%$ (HPLC)
Melting Point	Approximately 241∘C
Boiling Point	Approximately 245.5∘C at 760 mmHg
Flash Point	Approximately 102.3∘C
Density	Approximately 1.478-1.49 g/cm³ at 22∘C
Solubility	Good solubility in water
Storage	Store in a cool, dry place, often recommended at 0−8∘C or 2−8∘C

Usage

Sodium 3-[[(dimethylamino)thioxomethyl]thio]propanesulphonate (DPS) has several key applications:

• Electroplating: It is widely used as a basic brightener in copper electroplating baths. When added to these baths, often in combination with other additives like polyethers and wetting agents, DPS helps to produce bright, flat, and ductile copper layers. This is crucial in industries such as automotive parts manufacturing and semiconductor production where high-quality copper plating is required for appearance, conductivity, or corrosion prevention. It can also act as a stabilizer in the chemical deposition of precious metals.
• Pharmaceutical Intermediate: DPS serves as an intermediate in the synthesis of various pharmaceutical compounds. Its specific chemical structure allows for its incorporation into more complex drug molecules.
• Biochemical Research: The compound is utilized as a reagent in certain biochemical assays. For example, it can aid researchers in studying enzyme activities and protein interactions.
• Analytical Chemistry: It can act as a stabilizing agent in chromatographic techniques, contributing to more accurate analytical results.
• Potential Environmental Applications: There is exploration into its use in wastewater treatment for the removal of heavy metals and organic pollutants.

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