Poly(styrenesulfonic acid), sodium salt [MW ~75,000] is a water-soluble anionic polyelectrolyte containing sodium sulfonate functional groups. This sodium salt form provides strong ionic functionality and hydrophilicity, making it useful in research and formulation work involving membranes, polyelectrolytes, conductive coatings, and ion-exchange materials.
Related names: PSS sodium salt, PSS-Na, sodium poly(styrenesulfonate), poly(sodium 4-styrenesulfonate), and polystyrenesulfonic acid sodium salt.
This product has a molecular weight of approximately 75,000 and a polydispersity of 3–5. It is used in research and formulation work involving fuel cells and membranes, polyelectrolytes and conductive coatings, and biomedical or drug delivery applications.
Key Properties
- Water-soluble anionic polyelectrolyte
- Product Number: 08772
- CAS Number: 25704-18-1
- Linear Formula: [-CH2CH(C6H4SO3Na)-]n
- Molecular weight: approximately 75,000
- Polydispersity: 3–5
- Intrinsic viscosity: 20% AQ 15–55 cps
- Viscosity: 20% AQ 15–55 cps
- Density: 0.801 g/mL at 25°C
- Contains sodium sulfonate functional groups
Applications
Fuel Cells & Membranes
Poly(styrenesulfonic acid), sodium salt is used in research and formulation work involving proton exchange membranes and related membrane systems where ionic functionality and water-compatible processing are important.
Polyelectrolytes & Conductive Coatings
This polymer is used as an anionic polyelectrolyte in electronic-material and coating research where charge transport, ionic interactions, and aqueous processing are relevant.
Biomedical & Drug Delivery Research
Poly(styrenesulfonic acid), sodium salt is used in biomedical and drug-delivery research where polyelectrolyte behavior, aqueous compatibility, and ionic polymer interactions are being evaluated.
Solubility & Compatibility Considerations
- Water-soluble sodium salt form
- Ionic interactions may vary with pH, ionic strength, salt concentration, and buffer composition
- Compatibility depends on substrates, counterions, active ingredients, fillers, surfactants, and other formulation components
- Users should confirm compatibility under the intended concentration, processing, and application conditions before scale-up
Final performance depends on polymer concentration, molecular weight distribution, ionic environment, substrate chemistry, drying conditions, and the intended research or formulation workflow.
Application Tips
- Evaluate concentration and dilution conditions in small-scale trials
- Account for ionic strength and counterion effects when developing membrane, coating, or polyelectrolyte systems
- Screen coating or membrane performance under the intended processing and use conditions
- Use appropriate controls when evaluating charge transport, conductivity, or polyelectrolyte behavior
Handling & Storage
- Store at 4°C
- Exercise normal care when handling
- Use normal precautions for laboratory polymer handling
- Keep container tightly closed when not in use
- Follow the product SDS for complete handling, storage, cleanup, and disposal guidance
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FAQ
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1. What is Poly(styrenesulfonic acid), sodium salt?
Poly(styrenesulfonic acid), sodium salt is a water-soluble anionic polyelectrolyte containing sodium sulfonate functional groups.
2. How is this product different from poly(styrenesulfonic acid)?
This product is the sodium salt form, which contains sodium sulfonate groups. The sodium salt form is commonly used where water solubility, ionic functionality, and polyelectrolyte behavior are important.
3. What applications is this product used for?
It is used in research and formulation work involving fuel cells and membranes, polyelectrolytes, conductive coatings, biomedical research, and drug-delivery application development.
4. What is the molecular weight and polydispersity?
This product has a molecular weight of approximately 75,000 and a polydispersity of 3–5.
5. How should this product be stored and handled?
Store at 4°C and exercise normal care when handling. Review the Safety Data Sheet before use for complete handling, storage, cleanup, and disposal guidance.
Safety & Documentation
Review the product specification and Safety Data Sheet before use. Exercise normal care when handling and follow SDS guidance for storage, cleanup, and disposal.
