Citric acid (CA for short, also known as citric acid) is an important organic acid [1], the appearance is colorless crystal, odorless, has a strong sour taste, easily soluble in water. According to its different water content, it is divided into monohydrate citric acid and anhydrous citric acid.
The calcium salt of citric acid is easily dissolved in cold water than in hot water, this property is commonly used to identify and separate citric acid, and anhydrous citric acid can be obtained by controlling the appropriate temperature when crystallizing, which has many uses in industry, food industry, cosmetic industry, etc.
| Appearance |
Colorless crystals or white crystalline powder |
| Clarity and color of solution |
Conforming with the test |
| Water % |
0.5max |
0.10 |
| Purity,% |
99.5-100.5 |
99.9 |
| Sulfate,% |
≤0.015 |
<0.002 |
| Oxalates,% |
≤0.036 |
<0.002 |
| Heavy metal,ppm |
≤10 |
<1 |
| Aluminum,ppm |
≤0.2 |
<0.2 |
| Lead,mg/kg |
≤0.5 |
<0.5 |
| Sulfated ash,% |
≤0.5 |
<0.03 |
| Bacterial endotoxins,Iu/mg |
≤0.5 |
<0.5 |
| Tridodecy lamine |
≤0.1 |
<0.1 |
| Mesh |
|
30-100mesh |
Citric acid is a relatively strong acidic organic acid. It is the largest organic acid produced by biochemical methods in the world. Citric acid and salts are one of the pillar products of the fermentation industry. They are mainly used in the food industry, such as sour agents and solubilizers. , Buffers, antioxidants, deodorants, flavor enhancers, gelling agents, toners, etc. are used as experimental reagents, chromatographic analysis reagents and biochemical reagents, and also used in the preparation of buffers. In the detergent industry, it It is an ideal substitute for phosphate. Boiler chemical cleaning pickling agent, boiler chemical cleaning rinsing agent, also used to prepare medicine cooling agent, detergent, etc.
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