Calcium silicate

Crystal structure
	View of the unit cell of calcium silicate along the b-axis
General
Surname	Calcium silicate
other names	Calcium silicate; Calcium silicate; Silica, calcium salt; E 552 ;
Ratio formula	CaSiO 3
Brief description	white odorless solid
External identifiers / databases
EC number	215-710-8
ECHA InfoCard	100.014.282
PubChem	14941
Wikidata	Q416365
properties
Molar mass	116.16 g mol −1
Physical state	firmly
density	approx. 2.0 g cm −3
Melting point	approx. 1700 ° C
solubility	practically insoluble in water
safety instructions
GHS labeling of hazardous substances	no GHS pictograms
	no GHS pictograms
H and P phrases	H: no H-phrases
	P: no P-phrases
MAK	Switzerland: 3 mg m −3 (measured as respirable dust )
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Calcium silicate is a chemical compound from the group of calcium compounds and silicates .

Occurrence

Calcium silicate occurs naturally in the form of the mineral wollastonite .

Extraction and presentation

Calcium silicate can be obtained by reacting calcium oxide (CaO, quicklime) with silicon dioxide (SiO ₂ , quartz or silica gel ):

{\ displaystyle \ mathrm {CaO + SiO_ {2} \ longrightarrow CaSiO_ {3}}}

properties

Calcium silicate is a white, odorless solid that is practically insoluble in water.

use

Calcium silicate board for structural fire protection

Calcium silicate is used in food technology as a release agent or as a carrier substance (for dyes and emulsifiers). It is approved in the EU as a food additive with the number E 552 with maximum quantity restrictions of 10 grams per kilogram for certain foods, for seasonings and food supplements also without maximum quantity restriction ( quantum satis ).

The mineral wollastonite is widely used in the ceramic industry and as a filler for polymers.

Calcium silicate boards are used in the building industry for structural fire protection and as internal insulation for walls and ceilings.

Web links

Commons : Calcium Silicate - Collection of images, videos and audio files

Individual evidence

↑ Entry on E 552: Calcium silicate in the European database for food additives, accessed on June 27, 2020.
↑ ^a ^b ^c ^d ^e ^f ^g Entry for CAS no. 1344-95-2 in the GESTIS substance database of the IFA , accessed on May 23, 2011(JavaScript required) .
↑ Swiss Accident Insurance Fund (Suva): Limit values - current MAK and BAT values (search for 1344-95-2 or calcium silicate ), accessed on November 2, 2015.

[E-Nummer552-1] Entry on E 552: Calcium silicate in the European database for food additives, accessed on June 27, 2020.

[GESTIS-2] ↑ ^a ^b ^c ^d ^e ^f ^g Entry for CAS no. 1344-95-2 in the GESTIS substance database of the IFA , accessed on May 23, 2011(JavaScript required) .

[3] Swiss Accident Insurance Fund (Suva): Limit values - current MAK and BAT values (search for 1344-95-2 or calcium silicate ), accessed on November 2, 2015.