SODIUM SILICATES

PRODUCT IDENTIFICATION

CAS NO. 1344-09-8

SODIUM SILICATE

EINECS NO. 215-687-4
FORMULA 2Na2O.SiO2
MOL WT. 184.04

H.S.CODE

2839.19

TOXICITY  
SYNONYMS Water glass; Soluble glass; Silicate of soda;
Silicic Acid Sodium Salt; Sodium silicate glass; Sodium Silicate Solution; Kieselsäure, Natriumsalz (German); ácido silícico, sal de sodio (Spanish); Acide silicique, sel de sodium (French);
SMILES

fusing sand and sodium carbonate

CLASSIFICATION

 

GENERAL DESCRIPTION

Sodium silicate, also called water glass or Soluble Glass, is any one of several compounds containing sodium oxide, Na2O, and silica, Si2O, or a mixture of sodium silicates varying ratios of SiO2 to Na2O, solids contents, and viscosity. Traditionally, sodium silicates are classified according to the acid from which they are derived as Orthosilicate Na4SiO4; Metasilicate Na2SiO3; Disilicate Na2Si2O5; Tetrasilicate Na2Si4O9. They are also classified by an X-ray diffraction method according to their crystalline structure. All these compounds are colorless, transparent, glasslike substance available commercially as a powder or as a transparent, viscous solution in water. They can be dissolved in water to form a syrupy liquid. Some forms are slightly soluble, and some are almost insoluble; they are best dissolved by heating with water under pressure. The solutions are strongly alkaline. They are produced chiefly by fusing sand and sodium carbonate in various proportions. The use of sodium silicates is as a raw material for making silica gel. Also used in detergent; as a cement for glass, pottery, and stoneware; for fireproofing paper, wood, cement, and other substances; for fixing pigments in paintings and cloth printing; and for preserving eggs.

APPLICATIONS

  • Silica gel production
  • Builder or anti-soil-redeposition agent for detergent
  • Peroxide stabilizer in bleaching for textile and pulp
  • Solubilizer in ink, flux binder for welding rods
  • Deflocculant for ceramic
  • Buffer
  • Fireproofing paper catalysts
  • Water treatment
  • Concrete hardner and acid-proof
  • Petroleum processing by emulsion breaking and corrosion prevention
  • Timber treatment
SALES SPECIFICATION

CULLED

LOW RATIO (2.3 - 2.5)

HIGH RATIO (3.3 - 3.5)

WATER GLASS

PROPERTY

GRADE 169

GRADE159

GRADE138

GRADE126

SPECIFIC GRAVITY (at 20 C)

1.690 max

1.590 min

1.380 min

1.260 min

INSOLUBILITY

0.2% max

0.2% max

0.2% max

0.2% max

Na2O

17 ~ 18%

14 ~ 15%

9 ~ 20%

6 ~ 7%

SiO2

36 ~ 38 %

34 ~ 36%

28 ~ 30%

23 ~ 25%

IRON DIOXIDE

0.05 % max

0.05 % max

0.03% max

0.03% max

TRANSPORTATION
PACKING In bag, In Drum, in Bulk
HAZARD CLASS 8
UN NO.

1719

OTHER INFORMATION
Hazard Symbols: C, Risk Phrases: 34/37, Safety Phrases: 13/24/25/36/45

 

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