Sodium metasilicate

Sodium metasilicate
Structural formula of polymeric sodium silicate
Ball and stick model of polymeric sodium silicate
Sample of sodium silicate in a vial
Names
IUPAC name
Sodium metasilicate
Identifiers
3D model (JSmol)
Abbreviations E550
ChEBI
ChemSpider
ECHA InfoCard 100.027.193 Edit this at Wikidata
EC Number
  • 600-279-4229-912-9
MeSH Sodium+metasilicate
RTECS number
  • VV9275000
UNII
UN number 1759 3253
  • InChI=1S/2Na.O3Si/c;;1-4(2)3/q2*+1;-2 checkY
    Key: NTHWMYGWWRZVTN-UHFFFAOYSA-N checkY
  • InChI=1/2Na.O3Si/c;;1-4(2)3/q2*+1;-2
    Key: NTHWMYGWWRZVTN-UHFFFAOYAB
  • [Na+].[Na+].[O-][Si]([O-])=O
Properties
Na2SiO3
Molar mass 122.062 g·mol−1
Appearance White crystals
Density 2.61 g/cm3
Melting point 1,088 °C (1,990 °F; 1,361 K)
22.2 g/100 ml (25 °C)
160.6 g/100 ml (80 °C)
Solubility insoluble in alcohol
1.52
Thermochemistry
111.8 J/(K·mol)
113.71 J/(K·mol)
−1561.43 kJ/mol
−1427 kJ/mol
Hazards
GHS labelling:
GHS05: CorrosiveGHS07: Exclamation mark
Danger
H302, H314, H315, H319, H335
P260, P261, P264, P270, P271, P280, P301+P312, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P312, P321, P330, P332+P313, P337+P313, P362, P363, P403+P233, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
2
0
0
Lethal dose or concentration (LD, LC):
1153[clarification needed] (rat, oral)
Safety data sheet (SDS) Avantor Performance Materials
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

Sodium metasilicate is the chemical substance with formula Na
2SiO
3, which is the main component of commercial sodium silicate solutions. It is an ionic compound consisting of sodium cations Na+
 and the polymeric metasilicate anions [–SiO2−
3–]n. It is a colorless crystalline hygroscopic and deliquescent solid, soluble in water (giving an alkaline solution) but not in alcohols.[1]

  1. ^ Chemical Book: "Sodium metasilicate". Accessed on 2018-05-13.