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CAS:77-09-8
MF:C20H14O4
EINECS:201-004-7
Other Names:Phenolphthalein;alpha.-Di(p-hydroxyphenyl)phthalide;1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxyphenyl)-;1(3H)-Isobenzofuranone,3,3-bis(4-hydroxyphenyl)-;2,2-bis(p-hydroxyphenyl)phthalide;
What is Phenolphthalein?
Phenolphthalein mainly acts on the large intestine, which produces semi-liquid excreta in 4 to 8 hours with little or no colic. The claim that yellow phenolphthalein is three times stronger than white remains unproven. As a result of enterohepatic circulation, the effect of a single dose is sustainable for 3 to 4 days. The drug is an active member of many laxatives that can be sold legally without prescription.
Specification
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Items
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Specifications
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Characteristics
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White powder
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Identification
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A: Positive
B: Positive |
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Appearance of Solution
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The Solution Is Clear And Not More Intensely Coloured Than Reference Solution Y7
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Melting Point
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It melts at about 260℃
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Related Substances
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0.5% max
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Heavy Metals
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10ppm max
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Acidity or Alkalinity
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Complies
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Chlorides
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100ppm max
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Sulphates
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200ppm max
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Loss on Drying
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0.5% max
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Sulphated ash
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0.1% max
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Assay
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98.0-101.0%(C20H14O4)
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Application
Main uses of phenolphthalein:
1. Pharmaceutical raw materials in the pharmaceutical industry: suitable for habitual and stubborn constipation, available in tablets, suppositories and other dosage forms.
2. Used in organic synthesis: mainly used for synthetic plastics, especially for the synthesis of naphthyridine polyaryl ether ketone polyaryl ether ketone polymers. This type of polymer has excellent heat resistance, water resistance, and chemical resistance. Due to its corrosion resistance, heat aging resistance and good processing and formability, fibers, coatings and composite materials made from it are soon widely used in electronic appliances, mechanical equipment, transportation, aerospace, atomic energy engineering and military fields.
3. Used as acid-base indicator, indicator for titration of non-aqueous solutions, and reagent for chromatographic analysis.
Package
25kg/drum
