Fig. 1 · Structure
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Phenolphthalein (disodium), 95%
pH Indicator
Phenolphthalein (disodium) is a pH indicator that exhibits significant colorimetric changes from acidic to alkaline environments. Primarily utilized in titrations and pH determination, this compound transitions from colorless in acidic conditions to pink in neutral and basic solutions. Its reliability in analytical chemistry makes it an essential reagent for various laboratory applications, including educational demonstrations and quality control experiments.
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Specifications
| Manufacturer | Adooq Bioscience |
|---|---|
| CAS Number | 518-51-4 |
| Applications | pH Indicator |
| Formula | C20H12Na2O4 |
| Molecular Weight | 362.29 |
| SMILES | O=C1OC(C2=CC=C(O[Na])C=C2)(C3=CC=C(O[Na])C=C3)C4=C1C=CC=C4 |
Storage & Solubility
In Vitro Solubility
Reported Solubility
No reported solubility data are available for this product.
Preparing Stock Solutions
| Concentration | |
|---|---|
Values use four significant digits. Prepare to the final solution volume; this is not the volume of solvent to add.
Stock preparation is unavailable for this product molecular weight.
Calculated stock concentrations do not establish solvent solubility. Refer to the reported solubility data for experimental guidance.
Storage
Store powder at -20°C, keep desiccated.
In powder form, the chemical is stable for 36 months.
In solution, store at -20°C and use within 1 month to prevent loss of potency. Aliquot to avoid multiple freeze/thaw cycles.