Trisodium citrate Trisodium citrate
Structural formula
| Business number | 01F3 |
|---|---|
| Molecular formula | C6H5O7Na3 |
| Molecular weight | 258.07 |
| label |
sodium citrate;sodium citrate, food sour agent, food additives |
Numbering system
CAS number:68-04-2
MDL number:MFCD00012462
EINECS number:200-675-3
RTECS number:GE8300000
BRN number:None
PubChem number:24899674
Physical property data
1. Properties: Colorless crystals or white granular powder, odorless, refreshing and slightly spicy.
2. Density (g/mL, 20/4℃): 1.008
3. Relative vapor density (g/mL, air=1): Uncertain
4. Melting point (ºC): 300
5. Boiling point (ºC, normal pressure): Uncertain
6. Boiling point (ºC, 5.2kPa): Uncertain
7. Refractive index: Uncertain
8. Flash point (ºC): Uncertain
9. Specific rotation (º): Uncertain
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10. Autoignition point or ignition temperature (ºC): Uncertain
11. Vapor pressure (kPa, 25ºC): Uncertain
12. Saturated vapor pressure (kPa, 60ºC): Uncertain
13. Heat of combustion (KJ/mol): Uncertain
14. Critical temperature (ºC): Uncertain
15. Critical pressure (KPa): Uncertain
16. Log value of oil-water (octanol/water) partition coefficient: Uncertain
17. Explosion upper limit (%, V /V): Uncertain
18. Lower explosion limit (%, V/V): Uncertain
19. Solubility: Soluble in water and glycerol, insoluble in ethanol.
Toxicological data
Acute toxicity:
Rat abdominal LD50: 1549 mg/kg; Mouse abdominal LD50: 1364 mg/kg;
Mouse intravenous LD50: 170 mg/kg; Rabbit intravenous LD50: 449 mg/kg;
Ecological data
None yet
Molecular structure data
None yet
Compute chemical data
1. Number of hydrogen bond donors: 1
2. Number of hydrogen bond acceptors: 7
3. Number of rotatable chemical bonds: 2
4. Topological molecular polar surface area (TPSA): 141
5. Number of heavy atoms: 16
6. Surface charge: 0
7. Complexity : 211
8. Number of isotope atoms: 0
9. Number of determined atomic stereocenters: 0
10. Number of uncertain atomic stereocenters: 0
11. Determined number of stereocenters of chemical bonds: 0
12. Uncertain number of stereocenters of chemical bonds: 0
13. Number of covalent bond units ：4
SexQuality and Stability
White crystalline particles or powder. Soluble in water, hardly soluble in alcohol, the pH of the aqueous solution is about 8. Odorless, with a cool and salty taste. Stable in air.
Storage method
This product should be sealed and stored in a cool, dry place away from light.
Synthesis method
It is obtained by neutralizing citric acid with sodium hydroxide or sodium bicarbonate. Dissolve sodium bicarbonate in water under stirring and heating, add citric acid, continue to raise the temperature to 85-90°C, and adjust the pH to 6.8. Add activated carbon to decolorize and filter while hot. The filtrate was concentrated under reduced pressure and crystallized after cooling. Filter, wash and dry to obtain sodium citrate.
Purpose
This product is used as a seasoning and stabilizer in food processing, as a buffer and secondary complexing agent in the non-toxic electroplating industry, as an anticoagulant, expectorant and diuretic in the pharmaceutical industry, and in brewing, injections, and pharmaceuticals. Film drugs, etc.