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Sodium isethionate (sodium 2-hydroxyethanesulfonate), with the molecular formula C₂H₅NaO₄S, is a white crystalline powder that is hygroscopic, highly soluble in water, and slightly soluble in ethanol. It is chemically stable and exhibits weak alkalinity. It is primarily used in the synthesis of surfactants, as an ingredient in personal care products, as a pharmaceutical intermediate, and as an electroplating additive.
| Item | Specification |
| Melting Point | 129-131.5°C (lit.) |
| Boiling Point | 490.4°C at 760 mmHg |
| Density | 1.4±0.1 g/cm³ |
| Flash point | 250.4±28.7°C |
| Specific rotation | -16.5° (c = 2, H₂O) |
| Vapor pressure | 1.88E-11 mmHg at 25°C |
| Refractive index | -16.5° (c = 2, H₂O) |
| Solubility | Soluble in water, slightly soluble in ethanol, insoluble in chloroform. |
Consumer and Fine Chemicals (Core)：Sodium isethionate is used as a key raw material for the synthesis of taurine and mild anionic surfactants, it is widely used in the formulation of personal care and laundry products.
Pharmaceutical Sector：Serves as a pharmaceutical synthesis intermediate and excipient, used in the formulation of antimicrobial agents and drug preparations.
Electroplating Industry：It is used as an electroplating complexing agent and brightening additive to enhance coating uniformity and stability.
Textile Printing and Dyeing：Acts as an auxiliary agent and leveling agent, improving fabric color retention and weather resistance.
Other Industries：It is used as a water treatment additive and raw material for organic synthesis, suitable for various industrial buffering and chelation applications.
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