Poly(styrenesulfonic acid), sodium salt, also known as sodium polystyrene sulfonate (NaPSS), is an analytical polymer standard with a nominal molecular weight of approximately 4,600.
CAS: 9080-79-9 | Nominal molecular weight: ~4,600
NaPSS is a water-soluble anionic polyelectrolyte used in polymer characterization and aqueous size-exclusion chromatography (SEC) workflows. This grade has a specified molecular weight range of 3,800–5,800.
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Key Properties
- Poly(styrenesulfonic acid), sodium salt
- Also known as sodium polystyrene sulfonate (NaPSS)
- Analytical polymer standard
- Water-soluble anionic polyelectrolyte
- CAS: 9080-79-9
- Nominal molecular weight: ~4,600
- Molecular weight specification: 3,800–5,800
- Appearance: off-white powder
- Storage: 4°C
Applications
Polymer Characterization
NaPSS standards are used in analytical workflows for characterizing water-soluble polymers and evaluating molecular weight by chromatographic methods.
Aqueous Size-Exclusion Chromatography
Sodium polystyrene sulfonate standards are used in aqueous SEC methods for molecular-weight calibration and polymer characterization.
Polyelectrolyte Research
NaPSS is a water-soluble anionic polyelectrolyte used in research involving the solution and chromatographic behavior of charged polymers.
Analytical Considerations
- Nominal molecular weight: ~4,600
- Specified molecular weight range: 3,800–5,800
- Analytical performance depends on the chromatography method and conditions used
- Electrolyte concentration, mobile-phase composition, stationary-phase chemistry, and temperature can influence NaPSS elution in aqueous SEC
Because NaPSS is a charged polymer, ionic, hydrophobic, and other non-size-exclusion interactions may affect chromatographic behavior. Analytical conditions should be selected and validated for the specific SEC method.
Application Tips
- Maintain consistent chromatography conditions when using the material as an analytical standard
- Control mobile-phase electrolyte concentration and composition in aqueous SEC methods
- Account for possible non-size-exclusion interactions when interpreting molecular-weight data
- Follow the calibration and operating requirements of the selected chromatography system and column
Handling & Storage
- Store at 4°C
- Store in a cool, well-ventilated location
- Ensure good ventilation during handling
- Wear protective gloves, safety glasses, and suitable protective clothing
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FAQ
Click a question to expand.
1. What is Poly(styrenesulfonic acid), sodium salt?
Poly(styrenesulfonic acid), sodium salt is also known as sodium polystyrene sulfonate or NaPSS. It is a water-soluble anionic polyelectrolyte. This grade is offered as an analytical polymer standard with a nominal molecular weight of approximately 4,600.
2. Is sodium polystyrene sulfonate the same as poly(styrenesulfonic acid)?
No. This material is the sodium salt form, sodium polystyrene sulfonate. It should be distinguished from the protonated poly(styrenesulfonic acid) form.
3. What is the molecular weight of this NaPSS standard?
The nominal molecular weight is approximately 4,600. The specified molecular weight range is 3,800–5,800.
4. What is NaPSS used for in polymer analysis?
NaPSS standards are used in polymer characterization and aqueous size-exclusion chromatography, including molecular-weight calibration workflows.
5. What factors can affect NaPSS analysis by aqueous SEC?
Electrolyte concentration, mobile-phase composition, stationary-phase chemistry, temperature, and non-size-exclusion interactions can influence NaPSS elution and should be controlled for the analytical method.
6. What is the CAS number?
The CAS number is 9080-79-9.
7. How should the material be stored?
Store at 4°C in a cool, well-ventilated location.
8. Can I request a larger quantity?
Yes. For larger quantities, use the bulk-quote option.
Safety & Documentation
Use appropriate laboratory ventilation and personal protective equipment when handling the material. Review the Safety Data Sheet (SDS) for complete handling and safety information and the Product Specification for current analytical specifications.
