Phenolphthalein

C₂₀H₁₄O₄

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

CAS: 77-09-8

ภาพรวม

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

องค์ประกอบ

ธาตุ	สัญลักษณ์	อะตอม	มวลอะตอม
Hydrogen	H	14	1.0080
Carbon	C	20	12.0110
Oxygen	O	4	15.9990

องค์ประกอบพื้นฐาน

Hydrogen ×14

4.4%

Carbon ×20

75.5%

Oxygen ×4

20.1%

การใช้งาน

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

ข้อเท็จจริงที่น่าสนใจ

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

ความปลอดภัย

⚠ 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

คุณสมบัติ

ประเภท: organic
สถานะ: solid
มวลโมลาร์: 318.32 g/mol
ความหนาแน่น: 1.2770 g/cm³
จุดหลอมเหลว: 262.5 °C
การละลาย: insoluble

Molecular Descriptors

Exact Mass: 318.0892
XLogP: 3.6
TPSA: 66.8 Å²
H-Bond Donors: 2
H-Bond Acceptors: 4
Rotatable Bonds: 2
Heavy Atoms: 24
Complexity: 438.0

สารประกอบที่เกี่ยวข้อง

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).