Gallic acid
- Product description
Chemical name: 3,4,5- trihydroxybenzoic acid Molecular formula and weight( based on 1983 international atomic weight )
Molecular formula: C6H2(HO)3 .COOH.H2O
Molecular weight: 188.4
Properties:White or grey white crystalline powder,losing crystal water at 100°C . Soluble in acetone,ethyl acetate, 85-share water, 6-share ethanol, 2-share boiling water, slightly soluble in cold water, insoluble in benzene or trichloromethane.
Use:Industrial gallic acid used in analyzing and testing bismuth, cerium, copper, nitryl,phosphorus, silver, thorium and titanium etc.. It is also widely used in the fields including organic synthesis, pharmaceutical, ink, dyes, national defence and food etc..
Specification: in accordance with JIS K8898-61 and GB5309-85
Main technical index:
|
|
Top quality of Japanese standard |
Top quality of national standard |
Factory standard |
|
Content¡¡ % ≥ |
98.5 |
98.5 |
99.50 |
|
Water solubility test |
Yellowish, clear |
Yellowish, clear |
Yellowish, clear |
|
Loss on drying % ≤ |
10.0 |
10.0 |
10.0 |
|
Residue on ignition % ≤ |
0.05 |
0.10 |
0.05 |
|
Sulphate % ≤ |
10.0 PPM |
0.02 |
10.0 PPM |
|
Tannin test≤ |
1.0 PPM |
1.0 PPM |
1.0 PPM |
|
Turbidity ≤ |
10.0 PPM |
10.0 PPM |
10.0 PPM |
|
Chromatic number APHA ≤ |
150 |
180 |
150 |
Changum Chemicals Co., Ltd
Changum specializes in international trade, focusing on exports of forestry chemicals such as gum rosin, gum turpentine and rosin derivatives. Today, in order to better integrate and expand domestic and foreign customer resources, Changum has expanded business into the global cross-border e-commerce field since the year 2020.