酚酞 IND

Name: 酚酞
SKU: S19120

Phenolphthalein

品牌：桔子

产品编号：S19120

CAS号：77-09-8

分子式：C20H14O4

分子量：318.32

MDL：MFCD00005913

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产品名称 :	酚酞
英文名称 :	Phenolphthalein
参考名称 :	3,3-二(4-羟苯基)-3H-异苯并呋喃酮
参考英文名称 :	3,3-Bis(4-hydroxyphenyl)isobenzofuran-1(3H)-one
CAS号 :	77-09-8
分子式 :	C20H14O4
分子量 :	318.32
SMILES :	C1=CC=C2C(=C1)C(=O)OC2(C3=CC=C(C=C3)O)C4=CC=C(C=C4)O
MDL NO :	MFCD00005913
PubChem CID :	4764
InChIKey :	KJFMBFZCATUALV-UHFFFAOYSA-N
储存条件 :	RT

外观 / 形态 :	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. (NTP, 1992)；White to yellow crystals; Aqueous solution is colorless to pH 8.5 and red above pH 9. [CAMEO]
颜色 / 形态 :	White or yellowish-white minute, triclinic crystals, often twinned；White rhombic needles；Pale yellow powder
熔点 :	262.5 °C；496 to 504 °F (NTP, 1992)
密度 :	1.277 @ 32 °C；1.299 @25 °C；1.299 at 77 °F (NTP, 1992) - Denser than water; will sink
溶解性 :	1 g dissolves in 12 ml alcohol, in about 100 ml ether; sol in dil solutions of Alkali hydroxides and hot solutions of alkali carborates forming a red soln；Insoluble in benzene and petroleum ether; slightly soluble in carbon disulfide; soluble in ethyl ether, chloroform, and toluene; very soluble in ethanol, acetone, and pyrene.；In water, 400 mg/L @ room temperature
解离常数 pKa :	9.7 (at 25 °C)；pKa = 9.7 at 25 °C
LogP :	log Kow = 2.41
热分解说明 :	When heated to decomposition it emits acrid smoke and irritating fumes.
气味 :	ODORLESS

资料来源：酚酞产品资料页；来源页标注 PubChem CID 4764，资料日期 2026-10-11。