Complaint
Appearance: white crystalline powder
Relationship / difference between sodium citrate Anhydrous and sodium citrate dihydrate:
The only difference is there are 2 crystal water molecule in sodium citrate dihydrate, there is almost no difference in chemical features and applications
| Melting Point | Dehydrate Point | Density |
| 300 ºC | 150 ºC | 1.76 g/m3 |
| EINECS | RTECS | PubChem | MDL |
| 200-675-3 | GE7810000 | 24899497 | MFCD00150031 |
Solubility: soluble in water (720g/L at 25), not soluble in alcohol.
Characteristic:
1. Big solubility in water, alcohol and ether
2. Water softening ability, it can combine the Ca2+ and other metal ions (except for alkali metal), and for the compounds (like Calcium citrate), their solubility in cold water is higher than hot water, which is a big advantage in detergent industry
3. pH buffering ability
4. Low toxic
| Index | Standard |
| Assay by wt % | 99.0~101.0 |
| Identification test | Pass |
| Clarity and color test of solution | Pass |
| Readily carbonized substances test | Pass |
| Acidity or alkalinity test | Pass |
| Arsenic by ppm | 1 max |
| Lead (Pb) by ppm | 1 max |
| Chlorides by ppm | 50 max |
| Sulphates by ppm | 150 max |
| Oxalates by ppm | 100 max |
| Heavy metal by ppm | 5 max |
| Mercury by ppm | 1 max |
| Water content by wt % | 11~13 |
| pH (5% water solu.) | 7.0~9.0 |
1. Food industry as acidity modifier
2. Detergent industry as water softener and auxiliary
3. Cosmetics
4. Chemical industry and etc.
Function and application in food industry:
1. As color fixative for fresh vegetables and fruits ( 1% CAM + 1~2% sodium chloride solution)
2. As pH buffering agent and modifiers in various mass production food
3. As antioxidant in the mass processing of many food
4. As modifier when combined with sodium bicarbonate in wheaten food
5. As flavor and smell-remover in salted food and cans
Function in detergent industry:
Replacing STPP to soften water with the following advantages:
1. Environmental friendly with good bi-degradation
2. Better safety in dish washing and other related detergents which can enter human organs easily
3. Good chelating ability, not only to Ca2+, Mg2+ but also to other non-alkali metal ions, and the solubility of these chelated salts in cold water is bigger than hot water
4. Better solubility than STPP, Zeolite
5. Good pH buffering ability
6. Rust inhibiting ability which is good for the related equipments and pipes
7. Thickening agent in liquid detergent system
We normally list 2 years as the shelf life in our COA, the real shelf life can be slightly longer than 2 years if it's stocked in good condition (bags are sealed enough, away from direct sun-light, moisture and other incompatible chemical materials)
