Phenolphthalein CAS NO.：77-09-8

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Description

General Specification：
【CAS No.】77-09-8
【molecular formula】C20H14O4
【molecular weight】318.323
【EINECS No.】201-004-7
【Package】25kg/drum
【Storage 】Store in a cool, dry, ventilated place with sealed drum

Technical Specification：

Item	Standard
Characteristics	A white to yellowish crystal or powder; odourless
Solubility	Soluble in ethanol, slightly soluble in ether, almost insoluble in water
Melting Point	Should be 260-263℃
Identification	（1）should be positive reaction
	（2）should be maximum absorption at 275nm and min absorption at 259nm.
	（3）Should be consistent with the IR control map
he color of the ethanol solution	The solution should be colorless or almost colorless
Loss on drying	≤1.0%
Residue on ignition	≤0.1%
Heavy Metal	No more than 10 of per million
Content	Should be 98.0%-101.0%

Product Usage：
①Pharmaceutical raw materials: pharmaceutical laxative, can stimulate the intestinal wall, cause intestinal peristalsis to promote defecation;
②Used in organic synthesis: mainly used in the synthesis of plastics, especially the synthesis of diazanazone poly aryl ether ketone poly aryl ether ketone polymerization；
③For alkali indicator: non-aqueous titration indicator, color layer analysis reagent.

Package & Storage：
25kg/drum
【Storage 】Store in a cool, dry, ventilated place with sealed drum