Chalk

Name synonyms: chalk natural technical disperse, calcium carbonate
Product name: сhalk, calcium carbonate
TU5743-008-05120542-96
CAS: 471-34-1
Chemical formula
CaCO3
Specification:
Name of indicators Norma TU
1. Appearance white powder
2. Mass fraction of CaCO3 + MgCO3 in terms of CaCO3, % not less than 96.0
3. Mass fraction of single oxides of iron and aluminum, % not more than 0.7
4. Mass fraction of substances insoluble in hydrochloric acid, %, not more than 3.0
5. Mass fraction of manganese, % not more
6. Mass fraction of copper, %, not more than 0.001
7. Mass fraction of iron oxide, % not more than 0.25
8. Mass fraction of water soluble substances, % not more than 0.25
9. Mass fraction of moisture, % not more than 0.2
10. The coefficient of reflection, % not less than 92
11. White 82
12. Mass fraction of free alkali calculated as calcium oxide, % not more
13. Mass fraction of ions SO4 and Cl in aqueous extract, % not more
14. Mass fraction of sand, % not more
15. Residue on sieve, %, not more:
No. 02 —
No. 009 0,3
No. 0,14 0,8
No. 0045 —
The total effective activity of natural radionuclides, BK/kg, not more than 370
Mass fraction of iron extracted by magnet, %, not more 0.03

Application:
• in the paint industry as a filler in paints and emulsions
• production of construction and finishing materials, dry mixes, fillings
• in the manufacture of ceramics
• manufacture of rubber and plastic products
• in the manufacture of glass
Packing: multilayer paper bags with p/e liner, big bags
Storage: in open areas under cover and in closed areas, avoiding moisture
Hazard class: 4 class.