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Preservative Agent Food Additive Sodium Citrate E331
Molecular Formula: Na3C6H5O7•2H2O
Molecular Weight: 249.10
CAS: 68-04-2
Character of sodium citrate :
Colorless or white crystalline granule or crystalline powder, odorless, tasting salty and cool. Soluble in water; difficulty in ethanol and slightly deliquescent in moist air, PH value is 7.6-8.6 in 5% aqueous solution. If heated to 150°c, it may loss crystal water.
Specifications of Sodium citrate
Definition | Complies with the test |
Characters | A white crystalline granular ,or caystal powders |
Identification | Complies with the test |
Assay | 99.5%~100.5% |
Loss on drying | 11.0%~13.0% |
Readily carbonisable substances | Pass the test |
PH(in 5% soulution) | 7.6-9.0 |
Chloride | ≤50ppm |
Oxalate | ≤300ppm |
Sulphate | ≤150ppm |
Heavy metals | ≤10ppm |
Arsenic | ≤4ppm |
Usage of Sodium citrate
In food processing industry,it is used as buffer,chelate agent,nutrient additive,emulslfier,flavor for yoghurt.In pharmaceutical industry,it is used as Anticoagulant and as preservative in syrup manufactured goods,buffer acidity in cold drink,prevent acid in dairy products,used as binder in cheese and minced meat,acid coagulant in jellies and jam,emulsifier and stabilizer,in cheese and ioe cream.
Storage of Sodium citrate:
Kept in a lightproof,well closed,dry and cool place,to avoid mixed storage with toxic,odor,and nonterrous powder.
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