1. Chemical Name: Sodium Citrate Dihydrate
2. Molecular Formula: C6H5Na3O7·2H2O
3. Molecular Weight: 294.10
4. CAS: 6132-04-3
5. EINECS: 201-069-1
6. Character: White granular crystals or white crystalline powder. Stable in air at room temperature, loses crystalline water when heated to 150℃, and decomposes upon further heating. It is insoluble in ethanol but readily soluble in water. The pH value of a 5% aqueous solution is 7.6 to 8.6. It is readily soluble in water and glycerol, slightly soluble in ethanol and ether. Two molecules of water of crystallization are lost at 150℃.
7. Usage: Used as food additives, chromatographic analysis reagents, pH regulators, emulsifying enhancers, etc.
8. Packing: It is packed with polythene bag as the inner layer, and plastic woven bag as the outer layer. 500KG net each jumbo bag; 25KG net each small bag.
9. Storage and Transport: It should be stored in a dry, clean, and ventilated warehouse, kept away from water and moisture during transport, unload with care so as to avoid damaging the bags. Be cautious to keep away from moisture and hot.
10. Specification
| ITEMS | STANDARD |
| Characters | White or almost white, crystalline powder or granular crystals. Slightly deliquescent in moist air. Freely soluble in water, practically insoluble in ethanol |
| Identification | Passes test |
| Appearance of solution | Passes test |
| Assay, w/% | 99.0 – 100.5 |
| Moisture, w/% | 11.0 – 13.0 |
| Readily carbonisable substances | Passes test |
| Acidity or alkalinity | Passes test |
| pH (5% aqueous solution) | 7.5 – 9.0 |
| Sulfate, mg/kg | ≤ 50 |
| Oxalate, mg/kg | ≤ 50 |