GALLIC ACID - (149-91-7)

introduction

prénom: gallic acid; 3,4,5-trihydroxybenzoic acid
* IUPAC
Numero CAS: 149-91-7
Formule chimique: C7H6O5 or C6H2(OH)3COOH
Masse molaire: 170.11954 g
Pourcentage de masse: C 49.421 %; H 3.5549 %; O 47.023 % 

Classification

Usages / Fonction

• "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

Obligations doubles: 4
Obligations Triple: 0
Obligations Sigma: 18
Obligations Pi: 4
Total: 22
carboxyl Groupes: 1
Les groupes hydroxylés: 3

Pour plus d'informations

Sources

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