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Sodium Salt of Polyaspartic Acid

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Sodium Salt of Polyaspartic Acid (PASP) is a water soluble polymer. PASP is a green water treatment agent.
  • Sodium Salt of Polyaspartic Acid 
  • ThFine
  • CAS No. 35608-40-6, 181828-06-8
  • Sodium Salt of Polyaspartic Acid 

Sodium Salt of Polyaspartic Acid 

CAS No.  181828-06-8,35608-40-6                Molecular weight:  1000-5000

Molecular Formula:   C4H5NO3M(C4H4NO3M)m(C4H4NO3M)nC4H4NO3M2         

Structural Formula:




Sodium Salt of Polyaspartic Acid is a kind of biopolymer materials, of which molecules contains abundant amido bond, carboxyl and other active groups. Amido peptide bond has biological activity and high chemical stability, hard to decompose at high temperature; carboxyl group can be complex with many metal ions in water, which make Sodium Salt of Polyaspartic Acid have high chemical activity in aqueous solution; in each structural unit of Sodium Salt of Polyaspartic Acid , the oxygen and nitrogen atoms can easily form hydrogen bonds with water molecules, it has good hydrophilicity and water solubility. The special molecular structure of Sodium Salt of Polyaspartic Acid ensures that it has good dispersing ability, corrosion inhibiting properties, excellent biodegradability and environmental friendly characteristics.






Yellow to umber liquid

Solid content %

40.0 min

Density (20℃)g/cm3

1.20 min

pH(1%  water solution)



According to different molecular weights of Sodium Salt of Polyaspartic Acid , it can be used in water treatment, agriculture and forestry, petroleum exploitation, detergents and other fields.

I. Water treatment

1.    Sodium Salt of Polyaspartic Acid has characteristic of polyanion surfactant, which can be chelated with magnesium, copper, iron, cobalt and other polyvalent metal ions after hydrolysis. It has excellent scale inhibition and dispersion properties. As scale and corrosion inhibitor, Sodium Salt of Polyaspartic Acid is widely used in industrial circulating water, boiler water, reverse osmosis water, oil recycled water, desalination water treatment, especially for water treatment systems of high hardness, high alkalinity, high pH and high concentration.

2.     Sodium Salt of Polyaspartic Acid has good scale inhibition on CaCO3CaSO4BaSO4Ca3(PO4)2 ,etc.. Its scale inhibition rate for CaCO3 is 100%.

3.    Sodium Salt of Polyaspartic Acid is an alternative of phosphor-containing Water Treatment Chemicals and has better scale inhibition effects. Sodium Salt of Polyaspartic Acid can avoid eutrophication and second pollution in water system.

II. Agriculture and Forestry

1.    Sodium Salt of Polyaspartic Acid can be used as fertilizer synergist in agriculture. Adding it into urea can improve fertilizer efficiency by 20-40% and reduce the fertilizer dosage;

2.   Adding Sodium Salt of Polyaspartic Acid in the production process for fertilizer can increase fertilizer granulation level, increase the number of standard particles to 97%, thereby enhancing the rate of finished products and reduce loss;

3.    Sodium Salt of Polyaspartic Acid can improve the nutrient absorption of grain, vegetable, melon and fruit, and flowers, promote root growth, increase crop yields, enhance plants and its stress resistance;

4.    Sodium Salt of Polyaspartic Acid can be used with phosphorodithioate and other pesticides to enhance pesticide effect, crop yields and improve crop quality;

5.    Sodium Salt of Polyaspartic Acid can form complex with heavy metals in the soil, displace heavy metals from the soil, in order to achieve the purpose of restoration of soil pollution.

III. Petroleum exploitation

1.    Sodium Salt of Polyaspartic Acid can form chelation with calcium, magnesium, copper, iron and other metal ions to attach to the metal surface of the container to prevent metal corrosion. It is an excellent corrosion inhibitor, especially for preventing oil pipeline corrosion caused by carbon dioxide;

2.    Sodium Salt of Polyaspartic Acid with molecular weight around 10000 can reduce fluid viscosity. In bentonite mud, when the dosage of Sodium Salt of Polyaspartic Acid  is 0.4%, the viscosity reduction rate can be over 70%;

3.    It has good resistance to salt and calcium;

IV. Detergents

1.  Sodium Salt of Polyaspartic Acid has characteristics of anionic surfactant and good chelation, dispersion properties. It can soften water, dispersing, anti-fouling, and prevent re-contamination of the greasy dirty off the clothes during the washing process.

2.    It can be adsorbed on the surface of dinnerware, prevent mouldy, resulting in better cleaning effect. It is an important component of dishwashing detergent for cleaning of hard surfaces;

V. Other Applications

Because of its good dispersion to inorganic and organic compouds, Sodium Salt of Polyaspartic Acid has been applied with different degree in pharmaceuticals, pigments,paints, leather, inorganic chemicals, oilfield chemicals and other fields. Sodium Salt of Polyaspartic Acid  is called "third-generation polyurea", it can be used to produce protective coatings of high weather resistance, high resistance to chemical corrosion, fast-curing paint, and applied directly to fast curing coatings on the metal substrate and industrial flooring, etc., ; it can be used in the tanning process as tanning agents, produces biodegradable leather; pharmaceutical carrier material made from Sodium Salt of Polyaspartic Acid has been widely used in family planning, anti-tumor drugs making etc.

Package and Storage:

Liquid: Normally in 200L HDPE drum, 1000L IBC, or customers’ requirement.

Storage for ten months in shady room and dry place.


Safety Protection:

Alkaline, Avoid contact with eye and skin, once contacted, flush with water.



Sodium Salt of Polyaspartic Acid;

Sodium Salt of Polyaspartic Acid (PASP)

Sodium PASP;polyaspartate;

Eco-friendly antiscalant and dispersant

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