Food additives

 Calcium carbonates (food additive E170) are well known as ordinary white chalk. The dye E170 is a chemical compound - a salt of carbonic acid, insoluble in addition to ethanol. In nature, calcium carbonates are widespread enough, they occur in the form of minerals calcite, aragonite and waterite. Most invertebrate groups (mollusks, sponges) consist of various forms of calcium carbonate. For the food industry, the E170 additive is produced by processing and cleaning chalk deposits. The food additive E170 is usually supplied to production in the form of a fine white powder. Chemical formula of calcium carbonate (dye E170): CaCO3.

Calcium carbonate is extracted from minerals. In addition, for the food industry, the purest dye E170 can be made from marble.
E170 additive plays an important role in the human body, participating in the processes of blood clotting, ensuring constant osmotic pressure of blood, regulating various intracellular processes. Calcium carbonate is used in medicine as medicines that compensate for the lack of calcium, as well as in the form of biologically active additives (dietary supplements).
At the same time, with excessive intake of calcium carbonate into the body and its overabundance, a person may have a "milk-alkaline syndrome", which has a high toxic effect and in severe cases can lead to death.  With a small overdose of calcium carbonate, a person may experience hypercalcemia - complications that include vomiting, abdominal pain and changes in mental state. The recommended daily prophylactic dose of calcium carbonate intake is from 1.2 to 1.5 g per day. In food, the content of the E170 additive is significantly lower, which indicates that the E170 dye can be attributed to safe food additives.
In the food industry, the additive E170 is used as a dye, an acidity regulator, a baking powder that prevents caking and clumping.
In addition calcium carbonate is widely used in various industries:
-in the production of household chemicals (cleaning products, shoe care, plumbing cleaning, etc.);
-in the production of personal hygiene products (for example, toothpaste);
-in the paper industry, for bleaching paper, cardboard, as a filler and deoxidizer;
-in the glass industry, as one of the main elements necessary for the production of glass (tableware, bottles, fiberglass);
-in the production of plastic products (pipes, plumbing, tiles, linoleum, carpets, etc.);
-in the paint industry, as one of the components of the coloring pigment;
-in construction, for the production of putty, sealant;
-in cleaning systems, as a means of combating environmental pollution;
-in agriculture, to restore the acid-base balance of the soil.
      The food additive E170 is considered harmless and is allowed for use in the food industry in the territory of the Russian Federation, Ukraine and most other countries.