CAS No.: | 77-09-8 |
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Formula: | C20h14o4 |
EINECS: | 201-004-7 |
Classification: | Organic Analytical Reagents |
Grade: | AR |
Specific Usage: | For Biological Purpose, For Tissue Medium Purpose, For Microbiological, For Microscopic Purpose, For Electron Microscopy, For Lens Blooming, Technical Grade, Pratical Use, Pro Analysis, Super Special Grade, For Synthesis, For Scintillation, For Electrophoresis Use, For Refractive Index, Chemical Medicine |
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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.
TEST ITEM: | SPECIFICATION: | RESULTS: |
Characteristics: | A white or almost white powder, practically insoluble in water, soluble in alcohol. | A white powder, practically insoluble in water, soluble in alcohol. |
Melting Point | It melts at about 260°C-262°C | 261°C ~262°C |
Identification | A:Positive B:Positive |
A:Positive B:Positive |
Appearance of solution | The solution is clear and not more intensely coloured than reference solution Y7 | Complies |
Related substances | Less than 0.01% | <0.01% |
Heavy metals | Not more than0.001% | <0.0009% |
Acidity or alkalinity | Complies | Complies |
Chlorides | Not more than 0.01% | <0.01% |
Sulphates | Not more than 0.02% | <0.02% |
Loss on drying | Not more than 0.5% | 0.12% |
Sulphated ash | Not more than 0.1% | 0.01% |
Assay | 98.0%-101.0%(C20H14O4) | 99.6% |
Storage condition: | Store in well closed drums, in cool and dry storage area. |
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