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Sodium citrate
Trisodium citrate dihydrate
Basic nature
An organic compound that is colorless rhombic columnar crystals, stable in the air, soluble in water and glycerin, and slightly soluble in ethanol. The aqueous solution is slightly alkaline and has a refreshing sensation when tasted. It becomes a dihydrate salt when heated to 100°C.
Chemical formula: C6H5Na3O7
Molecular weight: 258.07
CAS: 68-04-2
EINECS: 200-675-3
Melting point: 300 C
Water solubility: easily soluble in water
Density: 1.008 g/cm3
Appearance: white or colorless powder
Index range
|
Test Items |
Unit |
E331 |
FCC |
|
Properties |
|
Colorless or white crystals |
Colorless or white crystals |
|
Identification test |
|
Compliance |
Compliance |
|
Clarity and color |
|
20% aqueous solution clarification |
20% aqueous solution clarification |
|
Contents |
% |
99.5-101.0 |
99.5-100.5 |
|
Water |
% |
8.8 max |
|
|
Sulfuric acid ash |
ppm |
0.05 max |
0.05 max |
|
Sulfate |
ppm |
|
Compliance |
|
Oxalate |
ppm |
100 max |
Compliance |
|
Ca |
ppm |
|
Compliance |
|
Heavy metal |
ppm |
5max |
5max |
|
Carbon compounds |
|
Standard color |
Standard color |
|
As |
ppm |
1 max |
3max |
|
Hg |
ppm |
1 max |
|
|
Pb |
ppm |
1 max |
0.5max |
|
Organic volatile impurities |
|
|
Compliance |
|
Trilauramine |
ppm |
|
0.1 max |
|
UV atomic absorption value |
|
|
Compliance |
Application
Construction industry
In the construction industry, sodium citrate can be added as a retarder when making concrete, which can improve the frost resistance, compression resistance and tensile properties of cement products.
Electroplating and manufacturing
Because sodium citrate has good complexing properties, it is also very useful in the electroplating industry. The electroplating process is developing rapidly, and the neutral citrate nickel plating has the advantages of environmental protection, pollution-free, easy maintenance, low corrosion, and excellent coating performance.
It is often used as a buffer, complexing agent, and bacterial culture medium. It is used in medicine for diuresis, expectoration, sweating, preventing blood coagulation, and used in food, beverage, electroplating, photography, etc.
Package
25KG/bag
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