Introduction
Sodium citrate, also known as trisodium citrate, sodium citrate, and trisodium citrate, is an organic acid sodium salt. It is white to colorless crystals with a cool and salty taste and is stable in the air. Its chemical formula is C6H5Na3O7. It is soluble in water and difficult to dissolve in ethanol. Its aqueous solution is slightly alkaline and is often used as a buffer, chelating agent, and bacterial culture medium. It is used in medicine as a diuretic, expectorant, and anticoagulant, and is also used in food, beverages, electroplating, photography, etc. It is one of the basic reagents for biological experiments.
Specification
Item | Unit | Quality Standards | Analysis Results |
Characters |
--- | White or almost white,crystalline powder or granularcrystals. Slightly deliquescent in moist air. Freely soluble in water,practically insoluble in ethanol |
Pass |
Identification | --- | Pass Test | Pass |
Appearance of solution | --- | Pass Test | Pass |
Assay | % | 99.0~ 100.5 | 99.9 |
Water | % | 11.0~ 13.0 | 12.02 |
Readily Carbonisable Substances | --- | Pass Test | Pass |
Acitidy or Alkalinity | --- | Pass Test | Pass |
PH (5%w/v) | --- | 7.5~9.0 | 8.46 |
Sulfate | mg/kg | ≤150 | <100 |
Oxalate | mg/kg | ≤100 | <50 |
Chloride | mg/kg | ≤50 | <50 |
Lead | mg/kg | ≤1 | <1 |
Arsenic | mg/kg | ≤1 | <1 |
Mercury | mg/kg | ≤1 | <1 |
Heavy Metals(as Pb 计) | mg/kg | ≤10 | <10 |
Tartrate | --- | Pass Test | Pass |
Pyrogen | --- | Pass Test | Pass |
Conclusion：The product is in conformity with BP/USP/FCC/E331 | |||
