94525-01-6

Basic information

• Product Name: POLY-(ALPHA,BETA)-DL-ASPARTIC ACID SODIUM SALT
• Synonyms: asparticacid,homopolymer,sodiumsalt;DL-Asparticacid,homopolymer,sodiumsalt;poly-dl-asparticacid,sodiumsalt;SODIUM POLY-D,L-ASPARTATE;POLY-(ALPHA,BETA)-DL-ASPARTIC ACID SODIUM SALT;SODIUM POLYASPARTATE;POLY-(A,B)-DL-ASPARTIC ACID SODIUM;POLY-DL-ASPARTIC ACID, SODIUM SALT, 40 WT. % SOLUTION IN WATER
• CAS NO: 94525-01-6
• Molecular Formula: C₄H₅NO₄*2Na
• Molecular Weight: 177.06634
• Product Categories: Amino Acids;Homopolymers;Polyamino Acids
• Mol File: 94525-01-6.mol
• Article Data: 3

Chemical Properties

• Melting Point: -10 to -20°C
• Boiling Point: 106 °C
• Flash Point: 113 °C
• Appearance: /
• Density: 1,21 g/cm3
• Refractive Index: n20/D 1.4462
• Storage Temp.: −20°C
• CAS DataBase Reference: POLY-(ALPHA,BETA)-DL-ASPARTIC ACID SODIUM SALT(CAS DataBase Reference)
• NIST Chemistry Reference: POLY-(ALPHA,BETA)-DL-ASPARTIC ACID SODIUM SALT(94525-01-6)
• EPA Substance Registry System: POLY-(ALPHA,BETA)-DL-ASPARTIC ACID SODIUM SALT(94525-01-6)

Safety Data

• WGK Germany: 3
• Hazardous Substances Data: 94525-01-6(Hazardous Substances Data)

Usage

General Description

Poly-(alpha,beta)-DL-Aspartic Acid Sodium Salt, also known as polyaspartic acid, is a biodegradable amino acid polymer that is often used as an environmentally friendly alternative to non-degradable options due to its biocompatibility and non-toxic properties. This chemical substance shows promise in diverse applications including water treatment, agriculture as a fertilizer synergy agent, detergents, oilfield, construction, and even pharmaceuticals due to its biodegradable nature. It has excellent chelating properties, can prevent scaling in pipes, and can boost the efficiency of fertilizers. Furthermore, when used as a medical drug carrier, it contributes to modification and controlled release of drugs. Nonetheless, being a sodium salt, it's highly soluble in water and should be handled with care to avoid skin and eye irritations.

Upstream product

• 56-84-8 L-Aspartic acid 
• 1310-73-2 sodium hydroxide 

Downstream Products

• 220201-34-3 mono-L-aspartyl chlorin e6 tetrasodium salt 
• 1428416-71-0 [2-(4-diethylaminobutyl)succinato][cis-(1,2-trans-cyclohexyldiamine)]platinum(II) phosphate 
• 56-41-7 L-alanin 
• 1782-17-8 N-hexadecanoyl-L-aspartic acid 
• 1116-12-7 N^α-decanoyl-L-aspartic acid 
• 1116-13-8 N^α-lauryl-L-aspartic acid 

Relevant articles and documents

Method for preparing L-asparaginic acid disodium

The invention discloses a method for preparing L-asparaginic acid disodium. The method comprises the following steps of performing a reaction at the temperature of 70-80 DEG C by using sodium carbonate or sodium hydroxide, and L-asparaginic acid as raw materials, and by using water as a solvent, after the reaction is finished, adjusting the pH value of reaction liquid to 9.0-12.0, decoloring the reaction liquid, performing filtration, performing concentration until the Baume degree of a solution is 40-45 degree Be, and reducing temperature; transferring the solution after temperature reduction is completed to a vacuum freeze drier, maintaining the pressure of the vacuum freeze drier to be 20-40Pa, performing pre-freezing at the temperature of minus 30 to minus 20 DEG C for 2-4h, and then maintaining the temperature to be at minus 25 to minus 15 DEG C for 3-5h; and drying materials after vacuum freeze-drying at the temperature of 70-80 DEG C for 3-6 hours, so as to obtain L-asparaginic acid disodium products. According to the method disclosed by the invention, an organic solvent is not used, so that the safety coefficient of production environment is increased; and the products are free from solvent residues, so that the quality of the products is improved, and the water content is easy to control.

COMPOSITIONS AND METHODS OF MAKING A PHOTOACTIVE AGENT

An improved two stage reaction process for production of mono-L-aspartyl chlorin e6. In a first stage, the activation reaction between chlorin e6 and a carbodiimide produces a previously unknown anhydride in an activation reaction product. This reaction product is purified to remove a significant proportion of the precursors of di-L-aspartyl chlorin e6. The purified activation reaction product contains a higher concentration of the previously unknown anhydride. This purified reaction product is used in a second stage: a coupling reaction of the purified activation reaction product with aspartate. The coupling reaction produces a coupling reaction product that has significantly reduced di-L-aspartyl chlorin e6 concentration. This reduced di-L-aspartyl chlorin e6 concentration facilitates purification of mono-L-aspartyl chlorin e6 from the coupling reaction mixture.