Disodium ethylenediaminetetraacetate, referred to as EDTA-2Na, is a good compounding agent in chemistry.With a molecular weight of 336.206, its molecular structure contains six coordination atoms (two nitrogen atoms and four oxygen atoms), which can form a stable chelate with metal ions. EDTA-2Na is odorless, odorless or slightly salty white or milky white crystal or granular powder.It is soluble in water (about 10 g/100mL, 20℃) and insoluble in ethanol.EDTA-2Na has important uses in dyes, food, medicines and other industries.As a food additive, it is widely used as a stabilizer, antioxidant, preservative, and chelating agent. It can prevent discoloration, deterioration, and turbidity caused by metal ions. It can also improve the oxidation resistance of grease (trace metals such as iron and copper in grease have the effect of promoting the oxidation of grease).

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Application Description

1. Food field: Disodium ethylenediaminetetraacetate (EDTA-2Na) solution can be used to soak to remove cadmium (RPs) (Cd2+) from rice protein (RPs) (Cd2+).

Disodium ethylenediaminetetraacetate can form stable water-soluble complexes with almost all metal ions. Its complex use can eliminate food turbidity, deterioration, discoloration and vitamin oxidation loss caused by metal ions, thereby protecting the color, stabilizing, antioxidant and fresh-keeping of food. Therefore, as a color protector, quality improver and synergistic antioxidant, it is often widely added to food.en widely added to food. 

According to GB 2760—2014 Regulations: Disodium ethylenediaminetetraacetate can be used in jam, vegetable puree or sauce (except tomato sauce), the maximum dosage 0.07g/kg; used for preserved fruits (only Preserved sweet potatoes), pickled vegetables, canned vegetables, canned nuts and seeds, canned grains, maximum dosage 0.25g/kg ; for compound seasonings, maximum dosage 0.075g/kg; for beverages (except packaged drinking water), maximum dosage 0.03g/kg.t>0.03g/kg.At the same time, GB 2760—2014 stipulates that calcium disodium ethylenediaminetetraacetate can be used as an antioxidant in compound seasonings, with a maximum dosage of 0.075g/kg.

2. Industrial field: n> Industrial field: is used for electroless copper plating, gold plating, lead-tin plating alloys  , electrochemical polishing of steel parts and the solution before silver plating o before silver plating of copper parts. It can also be replaced by EDTA-2Na.It is also used in detergents, liquid soaps, shampoos, agricultural chemical sprays, color photosensitive materials, bleaching fixers, leaching valuable metals from waste batteries  , water purifiers, PH regulators, coagulants, etc.In the reduction initiation system used for the polymerization of Styrene-butadiene rubber, EDTAdisodium, as an integral part of the active agent, is mainly used to complex ferrous ions and control the polymerization reaction speed.

3. Medicine and scientific research: search: Analytical chemistry: Determinacal chemistry: Determination of metal iDetermination of metal ion content n of metal ion content by coordination titration.

4.Food testing: Disodium ethylenediaminetetraacetate has been studied in food testing methods, the most of which is high performance liquid chromatography. In addition to this method, there are: ion chromatography titration method, colorimetric method, thin layer chroma