Calcium Carbonate

Synonym(s)

: Aragonite, limestone, calcite

Mol. Formula

: CaCO3

EC / List no.

: 207-439-9

CAS no.

: 471-34-1

Molecular weight

: 100,09

Calcium carbonate is the carbonic salt of calcium (CaCO3). Calcium carbonate is used therapeutically as a phosphate buffer in hemodialysis, as an antacid in gastric hyperacid for the temporary relief of indigestion and heartburn, and as a calcium supplement for the prevention and treatment of osteoporosis.

Application

» Calcium carbonate is a direct food additive. It is used as dough strengthener to replace starch and gluten, to precipitate the remaining pectin as a firming agent, to strengthen the supporting tissue and prevent it from collapsing during processing,
» It is used as a nutritional supplement, as a pH control agent, to modify and maintain active acidity or alkalinity, and as a stabilizer and thickener to produce viscous solutions or dispersions, thicken, improve consistency or stabilize emulsions.

Product Specifications

Physical and Chemical Properties
» Calcium carbonate appears as white powder or colorless crystals.
» It is odorless and has a chalky taste.

Properties

Characteristics	Unit	Value	Condition
Melting point	°C	825- 1339	Decomposes
Boiling point			Decomposes
Density	g/cm3	2.7- 2.95	20 °C
Solubility	mg/ L	14	25 °C, soluble with water
Vapor pressure	mm Hg	0
Corrosivity		Non-corrosive
pH		8-9
Refractive index		1.7219	300 nm