Also known as trisodium citrate, it is a sodium salt of an organic acid. The appearance is white to colorless crystals, with a cool salty taste, and stable in the air. The chemical formula is C6H5Na3O7, soluble in water but insoluble in ethanol. The aqueous solution has a slight alkalinity and is commonly used as a buffering agent, chelating agent, bacterial culture medium. It is used in medicine as a diuretic, expectorant, anticoagulant, and in food, beverage, electroplating, photography, and other fields. It is one of the basic drugs used in biological experiments.
It is widely use in many fields like the following:
Sodium citrate is mainly used as a food additive with the highest demand, and can also be used as a seasoning, expansion agent, stabilizer, buffering agent, and emulsifier; In addition, sodium citrate can be used in combination with citric acid as a flavoring agent, gelling agent, and nutritional supplement for various pastries, cold drinks, juices, beverages, cold drinks, dairy products, and jams.
In the pharmaceutical industry, citrate ions in sodium citrate can react with calcium ions to form soluble complexes, making it suitable as a blood transfusion agent and anticoagulant for the processing and storage of blood products.
Sodium citrate has excellent chelating properties and therefore has good applications in the electroplating industry. It is also applied in the manufacturing of nanomaterials and ceramic industry for grinding and whitening technology.
Sodium citrate can not only improve the cleaning effect, but also reduce environmental pollution. Sodium citrate special cleaning agent is non corrosive, so some precision instruments can also be cleaned with this special cleaning agent.
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Feature of Sodium citrate:
1.Due to the fact that the raw materials for preparing sodium citrate mainly come from grains, it is absolutely safe and reliable, and will not pose any harm to human health. The United Nations Food and Agriculture Organization and the World Health Organization do not impose any restrictions on its daily intake, and it can be considered non-toxic.
2.Sodium citrate has good pH regulation and buffering properties. Sodium citrate is a weak acid strong base salt that can form a strong pH buffering agent with citric acid. Therefore, it has important applications in situations where pH changes are not suitable for large ranges. In addition, sodium citrate also has excellent retarding and stabilizing properties.
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Specification of Sodium citrate:
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TEM |
STANDARD |
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APPEARANCE |
White, Colorless crystalline powder |
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ASSAY |
99.0~100.5 % |
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Light transmittance |
≥95.0 % |
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LOSS ON DRYING |
≤13.0 % |
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PH value |
Pass the test |
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Sulfate |
≤0.01 % |
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ferric salt |
≤5.0 mg/kg |
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Oxalate |
≤0.01 % |
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Calcium salt |
≤0.02 % |
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Carbonizable substances |
≤1.0 |
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Chloride |
≤0.005 % |
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Lead |
≤2.0mg/kg |
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Arsenic |
≤1.0mg/kg |
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Water insoluble substances |
Pass the test |
Production of Sodium citrate:
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