Molecular Weight: 376.36 g/mol
Chemical Structure
Check the
Phenol Red sodium salt
product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.
Batch:
All in vitro solubility values are batch-tested experimental data (non-literature values).
| Solvent | Solubility & Note |
|---|---|
| DMSO |
75 mg/mL
(199.27 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.) |
| Ethanol | 20 mg/mL |
| Water | 15 mg/mL |
Q: Why does a DMSO stock precipitate in media/saline?
A: It is caused by unheated aqueous media (supersaturation), local solvent shock, or incorrect mixing sequence.
How to fix it?
- Preheat media/saline to 37°C.
- Mix rapidly (pipette/vortex) upon addition.
- For complex mixes, always add the aqueous phase last.
- Re-dissolve minor precipitates with a 37°C water bath and sonication (≤30 min).
| CAS Number | 34487-61-1 | |
|---|---|---|
| Molecular Formula |
C19H13NaO5S |
|
| Molecular Weight (MW) | 376.36 | |
| SMILES | [Na+].OC1=CC=C(C=C1)C2(O[S](=O)(=O)C3=CC=CC=C23)C4=CC=C([O-])C=C4 |
Note: Technical data last updated: Sep 1, 2026.