| Name | Active Calcium |
| Synonyms | Active Calcium |
| Physical and Chemical Properties | White powder, odorless, salty and astringent. Soluble in acidic solution, insoluble in water. CO2 is absorbed in the air to produce calcium carbonate. It is strongly alkaline and has corrosive effect on skin and fabric. The oral LD50 of mice was 10.25 g/kg. |
| use | as filler, widely used in rubber, plastic, wire and cable, ink, etc. As a calcium nutrition enhancer, it is easy to ionize under the action of gastric juice and has good absorption effect. Our country stipulates that it can be used for salt and meat floss, with a maximum usage of 5~10 g/kg (calculated by calcium, the same below); The usage amount in infant food is 3.0~6.0 g/kg; The usage amount in cereals and their products is 1.6~3.2 g/kg; The usage amount in drinking liquid and milk beverage is 0.6~0.8 g/kg. It can also be used as a neutralizer for fermented dough, instead of sodium carbonate or sodium bicarbonate, to increase calcium and reduce sodium. Calcium fortifier. |
| production method | the oyster shell is cleaned and then calcined and activated at 1250~1500 ℃ for 2 hours to generate the intermediate product CaO, which is naturally cooled and then crushed to a 100 mesh sieve. When heated to 20~30 ℃ in water, impurities are leaked through the gap of the lid, and the obtained white powder is the finished product. oyster shell is used as raw material, washed, calcined at 1250 ℃ for 2 hours, cooled, hydrolyzed and crushed to obtain the product. |