Recommended CAS 6131-90-4 Sodium Acetate Special for Water Treatment

Sodium acetate properties

1. Chemical properties
Chemical formula: CH₃COONa

Molecular weight: 82.03 g/mol (anhydrous matter); 136.08 g/mol (trihydrate)

Structure: Composed of the radical acetate ion (CH₃COO⁻) and sodium ion (Na +).

pH value: The aqueous solution is weakly alkaline, pH is about 8-9.

2. Physical properties
Appearance:

Anhydrous sodium acetate: white crystalline powder.

Sodium acetate trihydrate (CH₃COONa·3H₂O) : colorless transparent crystal.

Solubility:

Soluble in water, solubility increases significantly with temperature (at 20°C, about 46.5 g per 100 mL of water).

Slightly soluble in ethanol, insoluble.

Melting point:

Anhydrous sodium acetate: 324°C.

Sodium acetate trihydrate: 58°C (dehydration decomposition).

Density:

Anhydrous sodium acetate: 1.528 g/cm³.

Sodium acetate trihydrate: 1.45g /cm³.

Hygroscopic: Sodium acetate trihydrate is easy to hygroscopic, and anhydrous sodium acetate hygroscopic is low.

3. Thermal stability
Heated decomposition. When heated to high temperatures, sodium acetate decomposes to

form sodium carbonate (Na₂CO₃) and methane (CH₄)

Sodium acetate water treatment purposes

1. pH regulator
Principle of action:

Sodium acetate solution is weakly alkaline and can be used to adjust the pH value of water.

As a buffer, sodium acetate can stabilize the pH value of the water and prevent acid-base fluctuations.

Application scenario:

Industrial wastewater treatment: Adjust the pH value of wastewater to meet discharge standards.

Drinking water treatment: Improve water quality and ensure the safety of drinking water.

2. Carbon source supplement
Principle of action:

Sodium acetate can be used as a carbon source to promote the growth and metabolism of microorganisms.

In the biological treatment process, sodium acetate provides organic carbon and enhances the activity of microorganisms.

Application scenario:

Sewage treatment: Used in activated sludge method and biofilm method to improve the efficiency of sewage treatment.

Denitrification process: as a carbon source, promoting denitrifying bacteria to convert nitrates into nitrogen.

3. Scale inhibitor
Principle of action:

Sodium acetate can form soluble complexes with calcium and magnesium ions in water to prevent the formation of scale.

Application scenario:

Boiler water treatment: prevent boiler and pipe scaling, extend the service life of equipment.

Cooling water system: Prevent scaling of cooling towers and heat exchangers to improve system efficiency.

4. Heavy metal removal
Principle of action:

Sodium acetate can react with some heavy metal ions (such as lead, chromium) to precipitate,

which is used to remove heavy metals from wastewater.

Application scenario:

Industrial wastewater treatment: Remove heavy metal ions from wastewater of electroplating, metallurgy and other industries.

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