Sodium Salt of Polyaspartic Acid
NANJING FINECHEM HOLDING CO., LTD
Specifications
Item Index
Appearance Yellow to umber liquid
Solid content % 40.0 min
Density (20℃)g/cm3 1.20 min
pH(1% water solution) 9.0-11.0
Packing & Storage
Packing 200L plastic drum, IBC(1000L), customers' requirement
Storage 20℃, 2 years.
Shipping Room temperature in China; may vary elsewhere
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General Information
Chemical & Physical Properties
Safety Information
Synthetic Route
Common Names Sodium Salt of Polyaspartic Acid|Polyaspartic Acid Sodium Salt
Structure
CAS No. 181828-06-8 Boiling Point (℃) N/A
Molecular Weight 1000-5000 Melting Point (℃) N/A
Appearance Yellow to umber liquid Vapor Specific Gravity N/A
HS Code N/A Flash Point (℃) N/A
Solubility N/A Autoignition Temperature (℃) N/A
Safety Phrases N/A
RIDADR N/A
WGK Germany N/A
Packaging Group N/A
Hazard Class N/A
SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Sore throat. Use local exhaust or breathing protection. Fresh air, rest.
Skin Redness. Burning sensation. Itching. Protective gloves. Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes Redness. Pain. Wear safety goggles. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
Ingestion Abdominal pain. Nausea. Vomiting. Do not eat, drink, or smoke during work. Wash hands before eating. Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention.

Preparation of L-aspartic acid: L-aspartic acid can be prepared from maleic anhydride or fumaric acid through a hydrolysis reaction.

Condensation: L-aspartic acid is then heated in the presence of a base catalyst, typically sodium hydroxide (NaOH), to induce the condensation reaction. The reaction proceeds through the formation of an intermediate cyclic imide, which then opens up to form a linear polymer.

Neutralization: After the reaction is complete, the resulting polyaspartic acid is neutralized with sodium hydroxide to form the sodium salt of polyaspartic acid

Frequently Asked Questions
What is Sodium Salt of Polyaspartic Acid?
Sodium Salt of Polyaspartic Acid is a biomimetic synthetic water-soluble polymer substance, which has the characteristics of phosphorus-free, non-toxic, pollution-free and completely biodegradable. It is an internationally recognized "green chemical". Due to the structural characteristics of polyaspartic acid containing active groups such as peptide bonds and carboxyl groups, it has extremely strong chelating, dispersing, and adsorption functions, and has excellent compatibility. This product is widely used as a fertilizer synergist, as a scale and corrosion inhibitor in industrial cooling circulating water, reverse osmosis water, oilfield reinjection water, metal cutting fluid, boiler and steam pipeline and other water treatment fields. And it can be used as a dispersant in papermaking, printing and dyeing, and washing industries, and it is also used in the field of daily chemicals.

What is Sodium Salt of Polyaspartic Acid used for?
As a new type of green water treatment agent, Polyaspartic Acid is applied to the field of industrial circulating cooling water treatment. Polyaspartic Acid can chelate calcium, magnesium, copper, iron and other multivalent metal ions, especially can change the crystal structure of calcium salt to form soft scale, which can be used in water treatment fields such as industrial circulating water, boiler water, reverse osmosis water, oilfield water and seawater desalination. it performs well in systems with high hardness, high alkalinity, high pH value, and high concentration multiples. The scale inhibition effect of PASP is better than that of commonly used phosphine-containing scale inhibitors. PASP and PBTCA have a synergistic effect after compounding.
As metal corrosion inhibitor, Polyaspartic Acid can get better corrosion inhibition effect when the pH is above 10. When the pH is between 8 and 9, the lower concentration of Polyaspartic Acid has better corrosion inhibition effect in seawater. Polyaspartic Acid is compounded with organic phosphorus, sodium tungstate, quaternary ammonium salt, zinc salt, molybdate, oxidized starch, etc. to achieve better corrosion inhibition effect.
Application of Polyaspartic Acid in agricultural field.
Polyaspartic Acid itself is not a fertilizer, but it can be used as a fertilizer synergist. Polyaspartic Acid has a chelating effect on metal ions. Polyaspartic Acid with a certain molecular weight can enrich nitrogen, phosphorus, potassium and trace elements to supply plants, so that plants can use fertilizers more effectively and improve the yield and quality of crops . The addition of Polyaspartic Acid can increase crop yield and improve soil quality.
Application of Polyaspartic Acid in the field of hygiene.
As a new type of high polymer, Polyaspartic Acid can react with cross-linking agent to further synthesize super water-absorbing agent. This water-absorbing agent is easy to degrade and can be used as fertilizer after degradation without any pollution to the environment. The features meet the requirements of sanitary products for super absorbent resin.
Polyaspartic Acid can be used as a cleaning agent, not only can replace phosphorus-containing detergents, but also can be added to dishwashing detergents because it is safe, non-toxic and non-irritating. And its effect is better than water and polycarboxylate cleaning effect. It can also be used as drilling fluid viscosity reducer, coal water slurry dispersant, detergent synergist, etc., and can also be applied to cosmetics and health products.
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