Sodium metasilicate

Synonym(s):Disodium metasilicate;Disodium silicate;Sodium silicate;Sodium silicon oxide

CAS NO.：6834-92-0
Empirical Formula: Na2O3Si
Molecular Weight: 122.06
MDL number: MFCD00003492
EINECS: 229-912-9
SAFETY DATA SHEET (SDS)
Update Date: 2024-11-13 11:39:26

What is Sodium metasilicate?

Chemical properties

White, granular powder. Soluble in water; p H of 1% solution 12.7. Noncombustible.

Chemical properties

The metasilicates are highly water soluble, but insoluble in alcohol, acid, and salt solutions. Solutions of sodium metasilicate, when heated or acidified, are hydrolyzed to free sodium ions and silicic acid. In moist air, they are corrosive to metals, including zinc, aluminum, tin, and lead, forming hydrogen gas. They are all strong bases reacting violently with acid.

The Uses of Sodium metasilicate

The various hydrates of sodium metasilicate are used in soap, detergent, and bath/washing products. They also have a major use as a builder (a material that enhances or maintains the cleaning efficiency of the surfactant, principally by inactivating water hardness) in soaps and detergents. They are also used as an anticorrosion agent in boiler-water feeds.

The Uses of Sodium metasilicate

Laundry, dairy, and metal cleaning; floor clean- ing; base for detergent formulations; bleaching aid; deinking paper. Also available as the pentahydrate whose properties are mp 72.2C, total Na 2 O content 29.3%, total Na 2 O in active form 27.8%, d 1.75 or 55 lb/cu ft.

The Uses of Sodium metasilicate

Sodium Metasilicate is an antibacterial pharmaceutical compound containing Sodium Hydrogen Carbonate.

What are the applications of Application

Sodium metasilicate is used in preparation of NaZnSiO3OH

Definition

A crystalline silicate.

Hazard

Toxic by ingestion, protective clothing required.

Flammability and Explosibility

Not classified

Safety Profile

Poison by ingestion and intraperitoneal routes. A caustic material whch is a severe eye, sktn, and mucous membrane irritant. Experimental reproductive effects. Ingestion causes gastrointestinal tract upset. Violent reaction with F2. When heated to decomposition it emits toxic fumes of Na2O. Used in cosmetics. See also SILICATES.

Purification Methods

Crystallise it from aqueous 5% NaOH solution. [Schwartz Z Anorg Allgem Chem 126 62 1923.]

Properties of Sodium metasilicate

Melting point:	1089°C
Density	2.4
refractive index	nD25 (glass) 1.520
solubility	soluble in cold H2O; reachot H2O; insoluble in ethanol
form	powder
color	White
Specific Gravity	2.61
PH	11(1 mM solution);11.91(10 mM solution);12.62(100 mM solution)
Water Solubility	Soluble in cold water. Hydrolyzes in hot water. Insoluble in acids, alcohol and salt solutions.
Hydrolytic Sensitivity	0: forms stable aqueous solutions
Merck	14,8642
Stability:	hygroscopic
CAS DataBase Reference	6834-92-0(CAS DataBase Reference)
NIST Chemistry Reference	Sodium silicate(6834-92-0)
EPA Substance Registry System	Sodium metasilicate (6834-92-0)

Safety information for Sodium metasilicate

Signal word	Danger
Pictogram(s)	Corrosion Corrosives GHS05 Exclamation Mark Irritant GHS07
GHS Hazard Statements	H290:Corrosive to Metals H314:Skin corrosion/irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P234:Keep only in original container. P260:Do not breathe dust/fume/gas/mist/vapours/spray. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.