What is the pH of gallic acid?
between 7-10
Results. We found that gallic acid produces two different radicals as a function of pH. In the pH range between 7-10, the spectrum of the gallate free radical is a doublet of triplets (aH = 1.00 G, aH = 0.23 G, aH = 0.28 G).
What is meant by gallic acid?
Medical Definition of gallic acid : a white crystalline acid C7H6O5 found widely in plants or combined in tannins and used especially in dyes and writing ink and as a photographic developer.
What is the function of gallic acid?
Gallic acid is a well-known natural antioxidant that is basically a secondary polyphenolic metabolite. Gallic acid is a very important common antioxidant tea formulation, known as an Ayurvedic herb. Apart from its phytochemical role, gallic acid is also used in tanning, ink dyes, and the manufacture of paper.
What has gallic acid?
Gallic acid is found in the leaves of bearberry, in pomegranate root bark, gallnuts, witch hazel, sumac, tea leaves, oak bark, and many other plants, both in its free state and as part of the tannin molecule. …
How is gallic acid formed?
Conventionally gallic acid is produced by acid hydrolysis of tannic acid but it has cost, yield and low purity disadvantages. Alternatively, gallic acid can be produced by the microbial hydrolysis of tannic acid by tannase (tannin-acyl-hydrolase EC 3.1. 1.20), an inducible enzyme, secreted by microorganisms (12).
Why is gallic acid used as a standard?
I found the details of Folin-Ciocalteu reaction, and the exact reason of choosing Gallic acid as a standard… the reasons are: Partly for historical reasons, In addition it is inexpensive, soluble in water, recrystallized easily from water, readily dried, and stable in the dry form.
What is the another name of gallic acid?
Gallic acid (also known as 3,4,5-trihydroxybenzoic acid) is a trihydroxybenzoic acid with the formula C6H2(OH)3CO2H. It is classified as a phenolic acid.
Where is gallic acid found?
In nature, gallic acid and its derivatives are present in nearly every part of the plant, such as bark, wood, leaf, fruit, root and seed. They are present in different concentrations in common foodstuffs such as blueberry, blackberry, strawberry, plums, grapes, mango, cashew nut, hazelnut, walnut, tea, wine and so on.
How is gallic acid produced?