Methylglycine N,N-diacetic acid, trisodium salt (MGDA)

Category：

Chelating agent(MGDA granule)

AP8401G is a readily biodegradable strong complexing agent. Its performance is higher, and the advantage for customers is that they are more cost-effective. The excellent ecological and toxicological properties of AP8401G have been tested in a wide variety of studies. We therefore recommends AP8401G as replacements for others,less environmentally friendly complexing agents. For example, phosphates contribute to eutrophication in waters. We are always pleased to offer all kinds of technical supports and services.

Category：

MGDA

granule

degradable chelating agent

replace traditional phosphate EDTA

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Methylglycine N,N-diacetic acid, trisodium salt (MGDA)

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Chemical description: Methylglycine N,N-diacetic acid, trisodium salt (MGDA)

Trade Mark: AP8401G

CAS NO.: 164462- 16-2

Description

　　AP8401G is a readily biodegradable strong complexing agent. Its performance is higher, and the advantage for customers is that they are more cost-effective.

　　The excellent ecological and toxicological properties of AP8401G have been tested in a wide variety of studies. We therefore recommends AP8401G as replacements for others,less environmentally friendly complexing agents. For example, phosphates contribute to eutrophication in waters. We are always pleased to offer all kinds of technical supports and services.

Typical Properties

　　These properties are typical but do not constitute specifications.

Items:	Index:
Appearance:	slightly yellow granulate
pH (1% in dist. water, 25 °C)	11.5
Concentration calculated as trisodium salt (MGDANa3 ) %	81
Bulk Density(g/l ) :	775
Water content (%):	13

Characteristics of the Product:

　　Appearance

　　AP8401G is a slightly yellow granulate.

Distribution of particles

　　The following curves show the distribution of particles of AP8401G(all values are approximate):

Complex formation

　　The most important property of AP8401G is its ability to form water soluble complexes with polyvalent ions (e.g. calcium, magnesium, lead, copper, zinc, cadmium, mercury, manganese, iron) over a wide pH range from 2 to 13.5. MGDA usually forms 1:1 complexes, i. e. 1 mol of MGDA chelates binds to 1 mol of metal ions. These complexes remain stable, especially in alkaline media and even at temperatures of up to 100 °C.

　　In aqueous solutions, MGDA competes for metal ions with other anions such as hydroxide, sulphate, sulphide, carbonate and oxalate that form sparingly soluble metal salts. The formation of chelates reduces the concentration of free metal ions to such an extent that the solubility products of many sparingly soluble metal salts are no longer exceeded. The result is that the salts no longer precipitate or may even redissolve.

Application

　　Household cleaning

　　　. AP8401G effectively replaces phosphorous containing builders in dishwashing detergents.

　　　. It enhances the cleaning power of a cleaner /detergent by sequestering hard water ions from water and dirt.

　　　. It prevents the deactivation of surfactants form hard water metal ions

　　　. It also deactivates transition metal ions thus stabilizing detergents that contain peroxides.

　　Industrial &Institutional cleaning

　　　. AP8401G forms stable, water-soluble metal complexes with all potentially harmful metal ions.

　　　. It dissolves existing and prevents new scales from causing problems in water circulation equipment (in e.g. the power, brewing ,and sugar industries).

　　　. Because of its low molecular weight this chelate performs very well in short contact cleaning.

　　Metal treatment

　　　. AP8401G is very suitable as a metal carrier, a stabilizer of process baths and for neutralizing trace impurities.

　　　. It can be used in e.g. alkaline Zinc and electroless Copper plating.

　　Polymer processing

　　　. AP8401G acts as a carrier of heavy metal ions.

　　　. It also conserves natural rubber lattices by deactivating metal ion impurities that can catalyze decomposition.

　　Textile industry

　　　. AP8401G complexes the transition metal ions that would otherwise catalyze the decomposition of the peroxide bleaching agent.

　　　. It also improves the performance of dye baths, where hard water metal ions like Ca and Mg inhibit dye from penetrating into the fiber.

　　Printing inks

　　　. AP8401G can be used to overcome the formation of insoluble resign soaps in water thinned inks (which may cause unwanted discoloration) resulting in clear and color-stalbe inks.

Storage Recommendation

　　Store in original packing or in PVC, PP,PE, stainless steel or bituminized tanks.

　　Avoid contact with aluminum, zinc, nickel, copper and copper alloys.

　　AP8401G should be stored in a dry place at temperatures below approx. 50 °C.

　　AP8401G is hygroscopic and soluble in water, with the result that they absorb moisture very quickly. Opened containers should be resealed tightly after each removal of product to prevent absorption of moisture.

　　It is advised to re-test the material after three years of storage.

Package

　　Packed in 20kgs/paper-plastic bag lined with plastic bag ，150kgs/cardboard drum or 1000kgs/big bag.

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