Phenolphthalein

C₂₀H₁₄O₄

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

CAS: 77-09-8

Tổng quan

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

Thành phần

Nguyên tố Ký hiệu Nguyên tử Khối lượng nguyên tử
Hydrogen H 14 1,0080
Carbon C 20 12,0110
Oxygen O 4 15,9990

Thành phần nguyên tố

H
Hydrogen ×14
4,4%
C
Carbon ×20
75,5%
O
Oxygen ×4
20,1%

Công dụng

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

Sự thật thú vị

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

An toàn

  • ⚠ 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

Tính chất

Loại
organic
Trạng thái
solid
Khối lượng mol
318,32 g/mol
Mật độ
1,2770 g/cm³
Điểm nóng chảy
262,5 °C
Độ hòa tan
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

Hợp chất liên quan

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).