Dimagnesium phosphate

• Magnesium phos
• Phosphate of magnesia
• E 343

Odorless, white solid

Fixed

2.13 g · cm -3

550 ° C ( decomposition)

Very poor in water ( 0.25 g · l-1 at 20 ° C)

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Magnesium hydrogen phosphate, and phosphate of magnesia, is a chemical compound of magnesium. It has the formula MgHPO4 · 3 H2O and belongs to the group of hydrogen phosphates.

Properties

Magnesium hydrogen phosphate is a colorless, crystalline powder, which does not occur in pure form due to its unedelen character in nature. This also applies to other derivatives of magnesium phosphate.

Description

Magnesium hydrogen phosphate is obtained industrially from sodium phosphate and magnesium sulfate heptahydrate. It dissolves difficult, but well in dilute acids in water. Above a temperature of 205 ° C it decomposes, giving off water and magnesium ( Mg2P2O7 ).

Derivatives

Magnesium phosphates exist in other constellations:

• Trimagnesium Mg3 (PO4) 2

• Magnesium dihydrogen phosphate Mg ( H2PO4 ) 2

• Magnesiumdiphosphat Mg2P2O7

Occurrence

In the human body

Brain, teeth, nerves, spinal cord, blood, muscles, bones

In food

In particular, green vegetables (part of the leaf greens ), fruits (eg bananas ), cereals

Use

Magnesium phosphates are used in the industry as ceramic raw materials and as flame- retardants.

In the food industry, magnesium phosphates are used as a feed additive, food additive and laxatives. Foods they are added as an acidity regulator and / or release agents. You are in the EU as a food additive under the E number 343 depending on the food with maximum quantity restrictions of up to 5 grams (with cream products ), up to 30 grams per kilogram allowed with coffee whitener.

Magnesium dihydrogen phosphate (magnesium phos ) is part of alternative medicine drugs such as the Cell salts.