OEDF acid

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OEDF acid

 

Chemical formula: Cco₂H ₈ O ₇ Pco₂

Reg. CAS number: 2809-21-4

Hydroxyethylenediphosphonic acid (HEDP, heteronomy acid, 1-hydroxyethane-1,1-difosfonovoy acid) organic compound with the formula CH3C(OH)(H2PO3)2. Forms complexes with uranium, thorium, iron, and rare earth elements. Used as the complexing agent in chemistry and many branches of industry.

Temperature melting point is 198-200 °C. it is Soluble in water, alcohol, dimethylformamide.

Forms stable complexes with uranium (VI), thorium (IV), iron (III) and rare-earth elements.

Get in the interaction:

• chloride, phosphorus (III) with acetic acid;

• phosphoric acid c acetic anhydride.

With the point of view of biology and agricultural chemistry OEDPK has the most advantages among all available kompleksonatov:

- its structure is most similar to natural complexants on the basis of of the polyphosphates having the primary fragment -R-O-R- , and OEDPK has a fragment -R-S-R-;

- under the action of light decomposes OEDPK on the leaves of plants to the acetates and phosphates. The last are used as food;

- OEDPK is also a growth regulator, has antimicrobial and antiviral properties;

- range kompleksonatov based on OEDPK completely covers the magnitude the pH of all soils and nutrient solutions and corresponds to pH 4-11;

- complexonate based on OEDPK prevent the formation of low-soluble salts (calcium carbonates) in pipelines nutritional systems, greenhouses and contribute to the reduction of salinization of rubble.

HEDP used in:

 production and engineering — as means of preventing salt deposits in the tubes;

 perfume stabilizer;

 of complexometry — titrant;

 analytical chemistry — masking agent;

 colour photography as an inhibitor the salt formation in a developing solution and a preservative for hydroxylamine. Is an effective substitute for Trilon B in the processing of non-ferrous papers (e.g. RA-4), as Trilon B interacts with hydroxylamine, decomposing it with the release of nitrogen and ammonia, resulting in the loss of hydroxylamine-preserving properties and rapid deterioration of the developing solution;

 Agriculture — fertilizer chelated form. Chelated nutrients are well absorbed plants, as in root and leaf feeding.

 in the oil industry in as inhibitor of scaling;

 in the chemical and textile industry as a complexing reagent;

 as complexing reagent, inhibitor of scaling in water circulation cooling systems industrial enterprises and thermal power plants in closed systems heating, hot water systems, and as a reagent for cleaning to prevent scaling in industrial systems.

 in the pulp and paper industry in the process of bleaching pulp at the stage of chelatchie.

Oksietilidendifosfonovaya acid transporterowych in covered transport facilities by rail, road, water transport. Transporting product in covered rail wagons are used carload and small shipments.

When transportation in open trucks Packed products must be covered a waterproof material. For transportation by water transport containers must be placed in universal containers.

Oksietilidendifosfonovaya acid is stored in roofed warehouses.

 

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