Phenolphthalein CAS 77-09-8 supplier in China
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CAS No.:77-09-8
Other Names:Phenolphthalein
MF:C20H14O4
EINECS No.:201-004-7
Place of Origin:China
Phenolphthalein appears as white or yellowish-white to pale orange fine crystalline powder. Odorless. Aqueous solution is acidic. Colorless to pH 8.5; pink to deep-red above pH 9. Colorless in presence of large amounts of alkali. Tasteless.Phenolphthalein is an organic compound used as a laboratory reagent and pH indicator. Phenolphthalein exerts laxative effects by stimulating the intestinal mucosa and constricting smooth muscles. However, phenolphthalein is no longer used as a laxative due to the suspected carcinogenicity of this compound.
Phenolphthalein 99% CAS 77-09-8 Speciticaiton :
| Item | Specifications |
| Characteristics | A white or almost white powder, practically insoluble in water, soluble in alcohol. |
| Melting Point | It melts at about 260ºC |
| Identification | A:Positive B:Positive |
| Appearance of solution | The solution is clear and not more intensely coloured than reference solution Y7 |
| Related substances | Less than 0.5% |
| Heavy metals | Not more than0.001% |
| Acidity or alkalinity | Complies |
| Chlorides | Not more than 0.01% |
| Sulphates | Not more than 0.02% |
| Loss on drying | Not more than 0.5% |
| Sulphated ash | Not more than 0.1% |
| Assay | 98.0%-101.0%(C2OHi4O4) |
| Microorganism | TPC<1000cfu/g |
| Y and M <100cfu/g |
| E-coli - absent |
| Staphylococcus Aureus-Absent |
| Pseudomonas Aeruginosa-Absent |
| Albicans Saccharomyces-Absent |
Phenolphthalein 99% CAS 77-09-8 Application :
This product is a commonly used acid indicator, and the color change range is pH 8.2 (colorless) -10.0 (red).
Phenolphthalein is one of the most widely used indicators. Phenolphthalein is used as a laxative to treat incomplete and infrequent bowel movement.
Phenolphthalein also is used in automotive and aviation industries.
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