General description

Ethylenediaminetetraacetic acid disodium salt (EDTA)  is a good compounding agent. It has six coordination atoms, and the complex formed is called a chelate. EDTA is often used in coordination titration, generally to determine the content of metal ions. EDTA has important uses in industries such as dyes, foods, and pharmaceuticals.

Figure 1 of chemistry structure

Application

Ethylenediaminetetraacetic acid (EDTA) is a widely used amine carboxyl chelating agent, which can be used in water treatment, household chemistry, photographic chemistry, papermaking chemistry, agricultural chemistry, oil field chemistry and analytical chemistry. As a integrator, it can form a chelate with a variety of metal ions to remove impurities in the water, which is the most important role in its application field; due to its good water solubility, its iron, copper, manganese, and zinc Chelate is a trace element fertilizer with good performance; in the polymer industry, it can be used as an activator for styrene-butadiene latex polymerization, a shape regulator for PVC suspension polymerization particles, and a polymerization terminator for acrylic fiber production; it has been used in paper fiber cooking. Oxide decomposition inhibitor, improve the whiteness of paper and reduce the scale of steamer; adding chelating agent in the dyeing process can increase the coloring rate of dyes and the hue and whiteness of printed and dyed textiles; used as a color film developer in photographic chemistry And the auxiliary agent of the paper fixing liquid.

1.It is an important chelating agent, which can chelate metal ions in solution. Prevent discoloration, deterioration and turbidity caused by metals and oxidation loss of vitamin C, and improve the oxidation resistance of oil (trace metals in oil such as iron and copper can promote oil oxidation).

2.Sodium iron EDTA has the effect of improving nutritional anemia, but if there is anemia, it is necessary to clarify the specific reasons, and do not use a large amount of drugs for a long time, otherwise it will not be good for your own health. You should choose according to the doctor's advice. If you have anemia, in addition to rational medication, you should pay more attention to your daily diet and life details, strengthen nursing and avoid some adverse stimuli.

3.Used as bleach and complexing agent, suitable for milk drinks and powdered mixed foods.

4.EDTA is widely used in various fields of biology, such as electrophoretic buffer, metal dependent proteolytic enzyme or nuclease reaction, cell digestion or sample depolymerization, etc. EDTA is a reversible inhibitor of metalloproteinase, and the effective concentration is generally 1-10 mm.

Synthesis

In a strong alkaline medium, ethylenediamine, sodium cyanide and formaldehyde undergo condensation reaction to obtain the corresponding sodium salt, which is acidified to obtain the product. The reaction equation is as follows.

Figure 2 of the synthesis chemistry equation of EDTA

Storage

Closed operation and enhanced ventilation. Operators must receive special training and strictly abide by the operating procedures. It is recommended that operators wear self-priming filter dust masks, chemical safety glasses, anti poison penetration work clothes and rubber gloves. Keep away from kindling and heat sources. Smoking is strictly prohibited in the workplace. Use explosion-proof ventilation system and equipment. Avoid dust generation. Avoid contact with oxidants. Handle with care to prevent damage to packaging and containers. Provide corresponding varieties and quantities of fire-fighting equipment and leakage emergency treatment equipment. Emptied containers may leave harmful substances.

The package shall be complete and the loading shall be stable. During transportation, ensure that the container does not leak, collapse, fall or damage. Mixed loading and transportation with oxidants and edible chemicals are strictly prohibited. During transportation, it shall be protected from sun exposure, rain and high temperature. The vehicle shall be thoroughly cleaned after transportation.