Detergent powder Instant powder sodium silicate cas no.1344-09-8

Uses of sodium silicate fluoride powder is make as insecticide and material of opal glass

 

►Description of sodium silicate

 

Properties
 

Chemical formula

Na2[SiF6]
 

Molar mass

188 g/mol
 

Appearance

white granular powder
 

Odor

odorless
 

Density

2.68 g/cm3
Solubility in water 0.64 g/100 mL (20 °C)
1.27 g/100 mL (50 °C)
2.45 g/100 mL (100 °C)
 

Solubility

insoluble in alcohol
 

Refractive index (nD)

1.312
Structure
 

Crystal structure

hexagonal
Hazards
Lethal dose or concentration (LD, LC):
LDLo (lowest published)

70 mg/kg (mouse, oral)


125 mg/kg (rabbit, oral)

 

Sodium fluorosilicate appears as white crystal, crystalline powder or colorless

 

hexagonal crystals. It is odorless and tasteless. Its relative density is 2.68;

 

it has moisture absorption capability. It can be dissolved in a solvent such as ethyl

 

ether but insoluble in alcohol. The solubility in acid is greater than that in water.

 

It can be decomposed in alkaline solution, generating sodium fluoride and silica.

 

After searing (300 ℃), it is decomposed into sodium fluoride and silicon

 

tetrafluoride. It is poisonous!

In 25 degrees, the sodium fluorosilicate has its water solubility being 0.78%.

 

Upon production, addition of an excess amount of sodium sulfate or sodium

 

chloride can increase the concentration of sodium ions in the system, thereby

 

increasing the solubility product of fluorine silicate and sodium ions, so that sodium

 

fluoride can be subject to more complete precipitation. Sodium fluorosilicate is the

 

byproduct in the production of calcium phosphate or the production of fluoride salt

 

in aluminum factory. It generally appears as a white crystalline powder with low

 

solubility in water (being 1% or less at room temperature), and the water solubility

 

increases slightly with increasing temperature. The aqueous solution of sodium

 

fluorosilicate is acidic (pH3). This is due to that its hydrolysis product contains

 

hydrofluoric acid. Reduction of the acidicity of the solution facilitates the hydrolysis

 

of sodium fluorosilicate. When pH is lower than 3.5-3.55, the hydrolysis reaction is

 

stabilized. When the pH is equal to 4, the hydrolysis reaction rate is significant.

 

When the pH value is equal to 8-8.5, the sodium fluorosilicate can be completely

 

hydrolyzed to exhibit as silica gel and precipitated out. Therefore, when sodium

 

fluorosilicate is added to the water glass, in addition to hardening effect of

 

precipitation of silicon dioxide gel caused by the neutralization of the sodium

 

hydroxide in the solution of water glass, the sodium fluorosilicate itself is also a

 

source of silica gel.

Specification of sodium silicate

Na2Si6 Item Specification
Na2SiF6 ≥99%
Fe ≤0.02%
Loss of Weight on drying at 105°C ≤0.40%
Insoluble in Water ≤0.50%
Free Acid(HCL) ≤0.15%
Heavy Metal(Pb) ≤0.05%

 

►Toxicity

This product is toxic with stimulation effect on the respiratory organ. People of

 

mistakenly oral poisoning will get severe symptoms of damage to the

 

gastrointestinal tract with the lethal dose being 0.4~4g. During the working of the

 

operator, they should wear the necessary protective equipment to prevent

 

poisoning. Production equipment should be sealed and the workshop should be

 

well ventilated.

Packing of sodium silicate:

Detergent powder Instant powder sodium silicate cas no.1344-09-8

 

Application

Detergent powder Instant powder sodium silicate cas no.1344-09-8Sodium fluorosilicate can be used as:

1. The insecticide in agriculture.

2. Opal glass

►Storage characteristics

 

Treasury: ventilation, low-temperature and drying; store it separately from food and

 

acid.

Products

Sodium Silicate

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