Calcium citrate is the calcium salt of citric acid. It is commonly used as a food additive, usually as a preservative, but sometimes for flavor. In this sense, it is similar to sodium citrate. Calcium citrate is also used as a water softener because the citrate ions can chelate unwanted metal ions. Calcium citrate is also found in some dietary calcium supplements (e.g. Citracal). Calcium makes up 21% of calcium citrate by weight.
| ITEM | STANDARD |
| Appearance | Colorless or white crystal |
| Content,% | 97.5-100.5 |
| Arsenic =<% | 0.0003 |
| Fluorine =<% | 0.003 |
| Heavy metals(As Pb) =<% | 0.002 |
| Lead =<% | 0.001 |
| Loss on drying,% | 10.0-13.3 |
| Acid-insoluble substance=<% | 0.2 |
| Alkalinity | According with the test |
| Easy carbony substance | According with the test |
| Identification A | Meet the erquirement |
| Identification B | Meet the erquirement |
| Mercury =< PPM | 1 |
| Yeast =< | 10/g |
| Mold =< | 10/g |
| E.Coli | Absendt in 30g |
| Salmonella | Absendt in 25g |