GALLIC ACID - (149-91-7)

Introduction

Name: gallic acid; 3,4,5-trihydroxybenzoic acid
* IUPAC
CAS Number: 149-91-7
Chemical Formula: C7H6O5 or C6H2(OH)3COOH
Molar Mass: 170.11954 g
Mass Percent: C 49.421 %; H 3.5549 %; O 47.023 % 

Classification

• organic • aromatic • carboxylic acid • phenol

Uses/Function

• "A colorless crystalline acid. It occurs naturally as an excrescence on the twigs of trees, esp. oaks, as a reaction to the deposition of gall wasp eggs. It is used as a skin astringent and in the manufacture of writing inks and dyes." 1

Bonding

Double Bonds: 4
Triple Bonds: 0
Sigma Bonds: 18
Pi Bonds: 4
Total: 22
Carboxyl Groups: 1
Hydroxyl Groups: 3

For More Information

Sources

(1) - Taber's Cyclopedic Medical Dictionary, 18th ed.; F. A. David Company: Philadelphia, PA, 1997; p 21.