Sodium silicate

  • Silicic acid, sodium salt
  • Sodium siliconate
  • Soluble glass
  • Waterglass
Formula
Na2SiO3
Structure
Description
A powdered or flaked solid.
Uses
Lining bessemer converters, acid concentraters, manufacture grindstones, abrasive wheels (as binder only).

Registry Numbers and Inventories.
CAS
1344-09-8
EC (EINECS/ELINCS)
215-687-4
RTECS
VV9365000
RTECS class
Primary Irritant
UN (DOT)
1759
Beilstein/Gmelin
19151 (G)
EPA OPP
72603
Swiss Giftliste 1
G-8095
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
Na2O3Si
Formula mass
122.06
Vapor pressure, mmHg
18
Density
1.37 g/cm3
Solubility in water
Slightly soluble
Viscosity
10 P (1088 C)
Refractive index
1.512 - 1.514
Thermal expansion
0.000022/K

Hazards and Protection.
Storage
Store in a cool, dry location in a sealed container.
Handling
Containers of this material may be hazardous when emptied. Since emptied containers retain product residues (vapor, liquid, and/or solid), all hazard precautions given in the data sheet must be observed.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Build dikes to contain flow as necessary. Neutralize spilled material with crushed limestone, soda ash, or lime.
Stability
Stable.Stable at normal temperatures and pressures.
Incompatibilities
Reacts violently with fluorine. Avoid contact with: acids, reactive metals such as aluminum and magnesium, zinc.
Decomposition
Silicates.

Fire.
Fire fighting
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.
Fire potential
Flammable solid.
Hazards
Oxides from metallic fires are a severe health hazard. Fire may produce irritating, corrosive and/or toxic gases.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Poison_Class
3
Exposure effects
   Ingestion
Burns of the esophagus and less commonly the stomach may occur after caustic ingestion; the absence of oral mucosal injury does not reliably exclude esophageal burns. Patients with stridor, drooling or vomiting are more likely to have esophageal burns.
   Inhalation
Stridor, dyspnea, upper airway injury, and pulmonary edema, especially following inhalation of vaporized caustics, may occur.
   Skin
Severe skin irritation and/or burns may occur.
   Eyes
See Inhalation.

First aid
 
   Ingestion
Mucosal if no respiratory compromise is present, dilute immediately with milk or water; no more than 8 ounces in adults and 4 ounces in children. Gastric ipecac contraindicated. Consider insertion of a small, flexible nasogastric or orogastric tube to suction gastric contents after recent large ingestions; the risk of further mucosal injury must be weighed against potential benefits.
   Inhalation
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Remove contaminated clothes. Irrigate exposed skin with copious amounts of water for at least 15 minutes or longer, depending on concentration, amount and duration of exposure to the chemical. A physician may need to examine the area if irritation or pain persist.
   Eyes
Home irrigation - exposed eyes should be irrigated with copious amounts of water for at least 30 minutes. An examination should always be performed. Ophthalmologic consultation should be obtained. Medical facility: irrigate with sterile 0.9% Saline for at least an hour or until the cul-de-sacs are free of particulate matter and returned to neutrality (confirm with pH paper).

Transport.
UN number
1759
Response guide
Hazard class
8
Packing Group
I; II; III
 
USCG CHRIS Code
SSN - solution, SSC
 
43 Misc. water solutions
Std. Transport #
4932328 4931413
 
IMO Pollution Category
C
IMO Hazard code
P