Methyl red sodium
Based on 1 Customer Validation
Methyl red sodium is a pH-sensitive acid-base indicator and colorimetric reagent with a pKa of 5.1. Methyl red sodium achieves visual judgment of the titration endpoint through reversible structural changes of protonation (red, pH < 4.4) and deprotonation (yellow, pH > 6.2). Methyl red sodium is widely used in acid-base titration in chemical analysis and buffer pH monitoring in biochemistry.
For research use only. We do not sell to patients.
- CAS No.: 845-10-3
- Formula: C15H14N3NaO2
- Molecular Weight:291.29
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Storage:
4°C, sealed storage, away from moisture and light
* In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light)
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Biological Activity
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Chemical Information
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Solvent & Solubility
- Purity & Documentation
- References
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Help & FAQs
Biological Activity
Methyl red sodium is used as an acid-base indicator in titration experiments. When the pH changes from 4.4 to 6.2, the color of the solution changes from red to yellow, which can be used to determine the titration endpoint[1].
Methyl red sodium can be dissolved in ethanol to make a 0.1% solution. A few drops are added to the solution to be tested. During the titration process, the color change is observed to determine the pH endpoint[1].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Chemical Information
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CAS No. 845-10-3
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Appearance Solid
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Molecular Weight 291.29
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Formula C15H14N3NaO2
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Color Brown to black
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SMILES
O=C(O[Na])C1=CC=CC=C1/N=N/C2=CC=C(N(C)C)C=C2
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Shipping
Room temperature in continental US; may vary elsewhere.
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Storage
4°C, sealed storage, away from moisture and light
* In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light)
Solvent & Solubility
H2O : < 0.1 mg/mL (insoluble)
Purity & Documentation
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Data Sheet (270 KB)
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SDS (393 KB)
- English - EN (393 KB)
- Français - FR (393 KB)
- Deutsch - DE (393 KB)
- Norwegian - NO (393 KB)
- Español - ES (393 KB)
- Swedish - SV (393 KB)
- Italian - IT (393 KB)
- Korean - KR (393 KB)
- Portuguese - PT (393 KB)
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Handling Instructions (2659 KB)
References
Calculators
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
Methyl red sodium Related Classifications
HY-W110780 Related Classifications
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