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149-91-7 Gallic acid

149-91-7 Gallic acid

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Name:  Gallic acid

Synonyms:  3,4,5-Trihydroxybenzoic acid; Pyrogallol-5-carboxylic acid

Molecular Formula:  C7H6O5

Molecular Weight:  170.12

CAS Number:  149-91-7

EINECS:  205-749-9

 

 Gallic acid is found both free and as part of tannins. Salts and esters of gallic acid are termed gallates. Despite its name, it does not contain gallium.

Gallic acid is commonly used in the pharmaceutical industry. It is used as a standard for determining the phenol content of various analytes by the Folin-Ciocalteau assay; results are reported in gallic acid equivalents. Gallic acid can also be used as a starting material in the synthesis of the hallucinogenic alkaloid mescaline.

Gallic acid is used in determination of bismuth,cerium,copper,nitrite phosphorus,silver thorium and titanium,etc.It is widely used in pharmaceutical, dyestuff, chemical and organic synthetic industries.

 

Specification

Product name

Gallic acid

Gallic acid

Item

Standard (food grade)

Specification (Pharma grade)

Appearance

A white or pale colored crystalline powder

Assay

99.0 %Min

99.5% Min.

Moisture

0.5 % Max.

10% Max.

Water Solution

Soluble in 85 parts of water,6 parts alcohol,2 parts of boiling water, slightly soluble in ether

Insoluble

10 ppm Max.

-

Sulfate               

20 ppm Max.

10 ppm Max.

Tannic Acid

1 ppm Max.

1.0 ppm Max.

Residue on Ignition

0.1 % Max.

0.1% Max.

Heavy metals

10ppm Max.

10ppm Max.

As

3ppm Max

3 ppm Max.

APHA

180Fn Max.

-

 

Storage: Reagent Gallic acid should be kept in a well-closed container.

Packing: Export products in paperboard circular kegs of 25kg net each.