Phenolphthalein CAS 77-09-8 3, 3-Bis (4-hydroxyphenyl) Phthalide

• CAS No.: 77-09-8
• Formula: C20h14o4
• EINECS: 201-004-7
• Aldehyde: Ester Ring Aldehyde
• Aether: Unsaturated Ether
• Hydroxybenzene: Polyphenol
• Model NO.: SUREST-44
• Ketone: Monoketone
• Shelf Life: 2 Years
• Stock: Available
• Molecular Weight: 318.33
• Water Solubility: <0.1 G/100 Ml
• Density: 1.299
• Melting Point: 258-263 ºC
• Transport Package: 25kg or 200 Kg/Barrel
• Specification: 98%min
• Trademark: Surest
• Origin: China
• HS Code: 2905420000
• Production Capacity: 1000 Tons Yearly

Product Description

Phenolphthalein

Name	Phenolphthalein
Synonyms	2-[Bis(4-hydroxyphenyl)methyl]benzoic acid; 3,3-Bis(4-hydroxyphenyl)-1(3H)-isobenzofuranone; 3,3-Bis(4-hydroxyphenyl)phthalide
Molecular Structure
Molecular Formula	C20H14O4
Molecular Weight	318.33
CAS Registry Number	77-09-8
EINECS	201-004-7

Properties

Density	1.299
Melting point	258-263 ºC
Water solubility	<0.1 g/100 mL

Chemical Property/Description

It is a white to slightly yellow crystalline powder, soluble in ethanol and alkali solutions, slightly soluble in ether,  insoluble in water, and characterized by colorless in acidic and neutral solutions and purplish red in alkaline solutions. It is often used as an acid-base indicator.


Main Uses:

(1) Pharmaceutical industry pharmaceutical raw materials: suitable for habitual stubborn constipation, tablets, suppositories and other dosage forms;
(2) For organic synthesis: Mainly used for synthetic plastics, especially the synthesis of diazanadione polyaryl ether ketone polyaryl ether ketone polymer, which has excellent heat resistance, water resistance, chemical corrosion resistance, heat aging resistance and good processing formability. The fibers, coatings and composite materials made from them are soon widely used in electronic and electrical appliances, mechanical equipment, transportation, aerospace, atomic energy engineering.
(3) For alkali indicator, indicator for non-aqueous titration, reagent for chromatographic analysis.