Phenolphthalein

C₂₀H₁₄O₄

IUPAC: 3,3-Bis(4-hydroxyphenyl)-2-benzofuran-1(3H)-one

CAS: 77-09-8

概述

Phenolphthalein is the most famous acid-base indicator, turning pink in basic solutions. It was also used as a laxative until concerns about carcinogenicity.

组成

元素 符号 原子 原子质量
Hydrogen H 14 1.0080
Carbon C 20 12.0110
Oxygen O 4 15.9990

元素组成

H
Hydrogen ×14
4.4%
C
Carbon ×20
75.5%
O
Oxygen ×4
20.1%

用途

  • • Acid-base indicator
  • • Universal indicator component
  • • Historical laxative

趣味知识

  • ✦ The most commonly used acid-base indicator in chemistry education worldwide

安全性

  • ⚠ Possible carcinogen
  • ⚠ No longer used as laxative

Structure

SMILES

C1=CC=C2C(=C1)C(=O)OC2(C3=CC=C(C=C3)O)C4=CC=C(C=C4)O

属性

类型
organic
状态
solid
摩尔质量
318.32 g/mol
密度
1.2770 g/cm³
熔点
262.5 °C
溶解度
insoluble

Molecular Descriptors

Exact Mass
318.0892
XLogP
3.6
TPSA
66.8 Ų
H-Bond Donors
2
H-Bond Acceptors
4
Rotatable Bonds
2
Heavy Atoms
24
Complexity
438.0

相关化合物

Caffeine

C₈H₁₀N₄O₂

Coumarin

C₉H₆O₂

Acetone

(CH₃)₂CO

Acrylic Acid

C₃H₄O₂

Cysteine

C₃H₇NO₂S

DDT

C₁₄H₉Cl₅

Alanine

C₃H₇NO₂

Diazepam

C₁₆H₁₃ClN₂O

Dichloromethane

CH₂Cl₂

Butane

C₄H₁₀

Frequently Asked Questions

What is Phenolphthalein?
Phenolphthalein (C₂₀H₁₄O₄) is a organic compound with the IUPAC name 3,3-Bis(4-hydroxyphenyl)-2-benzofuran-1(3H)-one.
What is the molecular weight of Phenolphthalein?
Phenolphthalein has a molar mass of 318.32 g/mol.
What state is Phenolphthalein at room temperature?
Phenolphthalein is a solid at room temperature.
Is Phenolphthalein organic or inorganic?
Phenolphthalein is classified as an organic compound.
What elements make up Phenolphthalein?
Phenolphthalein (C₂₀H₁₄O₄) is composed of Hydrogen (H), Carbon (C), Oxygen (O).