34345-47-6

Basic information

• Product Name: POLY-L-ASPARTIC ACID SODIUM SALT
• Synonyms: POLY-L-ASPARTIC ACID SODIUM SALT;POLY-D-ASPARTIC ACID, SODIUM SALT;L-Aspartic acid homopolymer sodium salt;Sodium poly-L-aspartate
• CAS NO: 34345-47-6
• Molecular Formula: C₄H₅NO₄*2Na
• Molecular Weight: 155.08451
• Mol File: 34345-47-6.mol
• Article Data: 3

Chemical Properties

• Appearance: /
• Storage Temp.: −20°C
• CAS DataBase Reference: POLY-L-ASPARTIC ACID SODIUM SALT(CAS DataBase Reference)
• NIST Chemistry Reference: POLY-L-ASPARTIC ACID SODIUM SALT(34345-47-6)
• EPA Substance Registry System: POLY-L-ASPARTIC ACID SODIUM SALT(34345-47-6)

Safety Data

• WGK Germany: 3
• Hazardous Substances Data: 34345-47-6(Hazardous Substances Data)

Usage

General Description

POLY-L-ASPARTIC ACID SODIUM SALT is a biodegradable and non-toxic water-soluble polymer that is commonly used in various industrial and commercial applications. As a powerful chelating agent, it has the ability to bind to metal ions, making it effective in water treatment processes for removing heavy metals and scaling. It is also used in personal care products, such as shampoos and detergents, as a dispersing agent and thickening agent. In addition, it is utilized in agriculture as a soil conditioner and in the construction industry as a concrete admixture. Overall, POLY-L-ASPARTIC ACID SODIUM SALT offers a wide range of uses due to its environmentally friendly properties and versatile applications.

Upstream product

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

Downstream Products

• 1116-13-8 N^α-lauryl-L-aspartic acid 
• 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 

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.