1-Decanesulfonic Acid Sodium Salt丨CAS 13419-61-9

1-Decanesulfonic acid sodium salt丨CAS 13419-61-9, also known as sodium decanesulfonate, is a water-soluble, anionic surfactant derived from sulfonated decane. It features a sulfonic acid group attached to a 10-carbon alkyl chain, with the sodium salt form improving its solubility and usability in aqueous systems. This compound is especially valued in high-performance liquid chromatography (HPLC), as well as in surfactant applications, pharmaceutical formulations, and industrial processes.

1. Ion-Pairing Reagent in HPLC (High-Performance Liquid Chromatography)
One of the most important and specialized uses of sodium decanesulfonate is in reversed-phase ion-pair chromatography (RP-IPC).
● Ion-Pair Chromatography: It acts as an ion-pairing agent, pairing with cationic analytes (e.g., amines, quaternary ammonium compounds) to improve their retention on non-polar columns (e.g., C18 columns).
● Improved Peak Shape and Resolution: This enhances peak sharpness, separation quality, and sensitivity in HPLC assays, especially when analyzing polar or charged molecules.
● Pharmaceutical and Biological Sample Analysis: Widely used for analyzing amino acids, peptides, and drug compounds, where improved resolution and retention are needed.
2. Surfactant in Industrial and Laboratory Applications
As an anionic surfactant, 1-decanesulfonic acid sodium salt exhibits strong surface activity, making it suitable for various emulsification, detergent, and wetting agent applications.
● Detergents and Cleaners: It can be incorporated into industrial cleaning formulations where a stable, water-soluble surfactant is required.
● Emulsifier: Helps stabilize emulsions in both aqueous-organic and oil-water systems, used in chemical and cosmetic formulations.
3. Pharmaceutical Formulations
1-Decanesulfonic acid sodium salt丨CAS 13419-61-9 can function as an excipient in drug development and production, primarily for solubilizing and stabilizing hydrophobic or ionic drug molecules.
● Solubilizing Agent: It can improve the bioavailability of poorly water-soluble drugs by enhancing their solubility in aqueous media.
● Formulation Aid: Helps in preparing stable injectable solutions or oral suspensions for certain active pharmaceutical ingredients (APIs).
4. Electrochemical and Surface Chemistry Research
Due to its amphiphilic structure, it is sometimes used in surface chemistry and colloid science to study interactions at interfaces.
● Micelle Formation: It forms micelles in solution, aiding in studies on micellar catalysis, drug delivery systems, and membrane mimic systems.
● Surface Modifier: It can be used to modify electrode surfaces or to influence surface tension in electrochemical cells.
5. Cosmetic and Personal Care Products
Although not as common as traditional surfactants, sodium decanesulfonate may appear in specialty formulations where a mild, high-performance surfactant is needed.
● Mild Surfactant: Its structure allows it to act gently on skin, making it a potential ingredient in facial cleansers, shampoos, or makeup removers.

1. Highly Effective Ion-Pairing Agent
Its primary benefit lies in its strong interaction with positively charged species, making it ideal for ion-pair chromatography. Its long alkyl chain (C10) provides the right balance of hydrophobicity and hydrophilicity for excellent column retention and selectivity enhancement.
2. Water Solubility and Chemical Stability
The sodium salt form provides high solubility in water, making it easy to use in aqueous solutions and compatible with a wide range of analytical and formulation systems. It also exhibits thermal and chemical stability, which ensures performance across varied conditions.
3. Versatile Surfactant Properties
As a surface-active agent, it can reduce surface tension, facilitate emulsification, and assist in solubilizing oils or non-polar compounds in water. This makes it beneficial in industrial, laboratory, and cosmetic settings.
4. Non-Volatile and Low Odor
Unlike many organic solvents or surfactants, sodium decanesulfonate is non-volatile, non-flammable, and odorless, offering advantages in handling safety and environmental compatibility.
5. Biodegradability and Environmental Considerations
Sulfonates like 1-decanesulfonic acid sodium salt are generally considered more biodegradable than some older surfactants (e.g., alkylphenol ethoxylates), reducing environmental impact in formulations where sustainability is a concern.

1-Decanesulfonic acid sodium salt丨CAS 13419-61-9 is a highly functional compound with notable applications in analytical chemistry (HPLC), surfactant systems, pharmaceutical formulation, and industrial cleaning solutions. Its unique combination of surfactant behavior and ion-pairing capability makes it especially valuable in chromatographic analysis of polar compounds. With benefits such as solubility, stability, and versatility, it plays a critical role in both routine laboratory procedures and complex industrial processes.