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Biological Buffers
MOPS Sodium Salt
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| Sigma-Aldrich® MOPS Sodium Salt Physical Properties |
| Synonyms |
3-(N-Morpholino)propanesulfonic acid sodium salt
4-Morpholinepropanesulfonic acid sodium salt |
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| Molecular Formula |
C7H14NNaO4S |
CAS Number |
71119-22-7 |
Useful pH range |
6.5 - 7.9 |
| Molecular Weight |
231.25 |
MDL Number |
MFCD00064350 |
pKa (at 25) |
7.2 |
| Sigma-Aldrich MOPS Sodium Salt Specifications Comparison |
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M9381 |
M9024 |
M5789 |
| Grade |
≥99.5% (titration) |
BioReagent, cell culture tested,
≥99.5% (titration) |
BioXtra, ≥99.5% as anhydrous (titration) |
| Purity |
≥99.5% |
≥99.5% |
≥99.5% |
| Reagent Testing |
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M9381 |
M9024 |
M5789 |
Enhanced Quality
Profile Buffers |
X |
X |
X |
| 260NM |
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≤0.1 |
| 280NM |
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≤0.1 |
| 290NM |
≤0.05 |
≤0.05 |
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| IR |
X |
X |
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| pH |
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10.0 - 12.0
(20 °C, 1 M in H2O) |
| Karl Fischer |
≤5% |
≤5% |
≤5% |
| Insoluble Matter |
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≤0.1% |
| Life Science Testing |
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M9381 |
M9024 |
M5789 |
| Endotoxin |
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≤0.1 eu/mg |
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| SPC |
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≤100 cfu/g |
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| Cell test |
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X |
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| RNAse |
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X |
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| DNAse |
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X |
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| Nickase |
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X |
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| Protease |
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X |
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| Trace Elemental Impurities |
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M9381 |
M9024 |
M5789 |
| Ammonia(NH4) |
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≤0.05% |
| Phosphorus(P) |
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≤0.005% |
| Chloride(Cl) |
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≤0.05% |
| Sulfate(SO4) |
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≤0.05% |
| Aluminum(Al) |
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≤0.0005% |
| Calcium(Ca) |
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≤0.001% |
| Copper(Cu) |
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≤0.0005% |
| Iron(Fe) |
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≤0.0005% |
| Potassium(K) |
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≤0.005% |
| Magnesium(Mg) |
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≤0.0005% |
| Lead(Pb) |
≤0.0005% |
≤0.0005% |
≤0.001% |
| Zinc(Zn) |
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≤0.0005% |
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