Phenolphthalein cas 77-09-8
What is Phenolphthalein?
Phenolphthalein is a white to light yellow crystal powder that is odorless, soluble in water, but soluble in alcohol. It is widely used as a pH indicator in chemical laboratories, turning pink into red in alkaline solutions (pH>8.3) and colorless under acidic or neutral conditions.
It is also a raw material medicine, which acts as a laxative agent, and acts on the colon and is used to treat constipation.
Recommended
Dosage: exact dosage should be subject to customer’s finial product formulation.
Phenolphthalein Quick Details
- Chemical Name:Phenolphthalein
- CAS No.: 77-09-8
- EINECS:201-004-7
- Molecular Fomula: C20H14O4
- Molecular weight: 318.32
- Appearance: White to yellow white powder
- Assay: 98%min
- Synonyms:1(3H)-Isobenzofuranone,3,3-bis(4-hydroxyphenyl)-;1(3H)-Isobenzofuranone,3,3-bis(4-hydroxyphenyl)-;2,2-bis(p-hydroxyphenyl)phthalide;3,3-bis(4-hydroxyphenyl)-1(3hChemicalbook)-isobenzofuranon;alpha-(p-hydroxyphenyl)-alpha-(4-oxo-2,5-cyclohexadien-1-ylidine)-o-toluicacid;alpha-di-(p-hydroxyphenyl)phthalide;Chocolax;componentofCorrectol
Phenolphthalein Typical Properties
| Item | Specifications | Results |
| Appearance | White or slightly yellow powder | Conform |
| Odor | odorless | Conform |
| Melting point℃ | 260-263 | 261.0-262.0 |
| The color of ethanol solution | Colorless | Conform |
| Chloride % | ≤0.01 | <0.01 |
| Sulfate % | ≤0.02 | <0.02 |
| Loss in drying % | ≤1.0 | 0.09 |
| Residue on ignition % | ≤0.1 | 0.05 |
| Heavy Metals（Pb）% | ≤0.001 | <0.001 |
| Assay % | 98.0-102.0 | 99.3 |
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Phenolphthalein Applications
- Acid-base indicator: Phenolphthalein develops color between pH 8.2 (colorless) and pH 10.0 (pink), and is a classic reagent for laboratory titration experiments.
- Used in organic synthesis: Mainly used for synthesizing plastics, especially synthesizing phthalazinone polyaryletherketone polyaryletherketone polymers. Due to the excellent heat resistance, water resistance, chemical corrosion resistance, heat aging resistance and good processing and forming properties, the fibers, coatings and composite materials made from them are widely used in electronic appliances, mechanical equipment, transportation, aerospace, atomic energy engineering and military fields.
Phenolphthalein Package & Storage
