MOPS sodium salt
3-(N-Morpholino)propanesulfonic acid sodium salt (CAS: 71119-22-7) is a white crystalline powder that functions as an effective biological buffer. With a molecular weight of 231.25 g/mol and a pKa of 7.2 at 25°C, it is suitable for applications requiring stable pH control within the 6.5-7.9 range. Its high purity and low trace metal content make it ideal for biochemical research, diagnostics, and pharmaceutical development.
- IUPAC
- 3-(N-Morpholino)propanesulfonic acid sodium salt,4-Morpholinepropanesulfonic acid sodium salt
- Synonyms
- 3-(N-Morpholino)propanesulfonic acid sodium salt4-Morpholinepropanesulfonic acid sodium salt

Biological Buffering Agent
MOPS sodium salt is widely used to maintain stable pH in biochemical and biological research. Its pKa value is well-suited for buffering physiological conditions, making it valuable in cell culture media and enzyme assays.
Electrophoresis and Chromatography
This compound serves as a buffer in gel electrophoresis (e.g., SDS-PAGE) and chromatographic techniques. It ensures consistent ionic strength and pH, crucial for reproducible separation of biomolecules.
Diagnostic Reagent Formulation
Its high purity and low levels of interfering ions make MOPS sodium salt suitable for use in the formulation of diagnostic reagents and kits, where pH stability is critical for assay performance.
Pharmaceutical Research
As a PharmaGrade buffer, it is employed in various stages of pharmaceutical research and development, particularly in processes requiring precise pH control and minimal contamination.
| Molecular weight | 231.25 |
|---|---|
| Empirical formula | C7H14NNaO4S |
| Assay | ≥99.5% anhydrous basis (titration) |
| Form | powder |
| Solubility | H2O: soluble1 M, clear, colorless |
| pH | 10.0-12.0 (1 M in H2O) |
| Impurities tested | ≤0.005% Phosphorus (P)≤0.1% Insoluble matter |
| Biological source | from synthetic |
| Water hazard class (WGK, DE) | 1 |
|---|---|
| Cation traces | Al: ≤0.0005%Ca: ≤0.001%Cu: ≤0.0005%Fe: ≤0.0005%K: ≤0.005%Mg: ≤0.0005%NH4+: ≤0.05%Pb: ≤0.001%Zn: ≤0.0005% |
| Anion traces | chloride (Cl-): ≤0.05%sulfate (SO42-): ≤0.05% |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Quality Level | ELITE |
|---|---|
| Product Line | PharmaGrade |
| Pka 25 °C | 7.2 |
| Foreign Activity | Cytotoxicity, DNase, NICKase, RNase, and Protease; tested |
| Absorption | A1M/260, H2O ≤0.1A1M/280, H2O ≤0.1 |
| Useful Ph Range | 6.5 - 7.9 |
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is MOPS sodium salt used for?
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MOPS sodium salt is primarily used as a biological buffer in research and diagnostics, particularly for maintaining stable pH in the range of 6.5-7.9, and in applications like electrophoresis and chromatography.
What is the CAS number and formula for MOPS sodium salt?
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The CAS number for MOPS sodium salt is 71119-22-7, and its empirical formula is C7H14NNaO4S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies MOPS sodium salt with an assay of ≥99.5% on an anhydrous basis. It is designated as ELITE and PharmaGrade, suitable for demanding applications. TSS does not represent this product as USP, BP, or EP grade unless explicitly stated.
What are the safety and handling considerations for MOPS sodium salt?
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MOPS sodium salt is classified under WGK Germany 1, indicating a low hazard to water. It is a powder that should be handled with appropriate personal protective equipment to avoid dust inhalation or skin contact. Refer to the Safety Data Sheet for detailed handling instructions.
Is MOPS sodium salt packed and shipped internationally?
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Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, including MOPS sodium salt, and handles international packing and shipping requirements.
How can I request a sample or quote for MOPS sodium salt?
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To request a sample or a quote for MOPS sodium salt, please use the contact form on our website or reach out to our sales team directly.
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