Magnesium hydrogen phosphate
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| General | |||||||||||||||||||
| Surname | Magnesium hydrogen phosphate | ||||||||||||||||||
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| Molecular formula | HMgPO 4 | ||||||||||||||||||
| Brief description |
odorless, white solid |
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| properties | |||||||||||||||||||
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| Physical state |
firmly |
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| density |
2.13 g cm −3 |
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| Melting point |
550 ° C (decomposition) |
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| solubility |
very bad in water (0.25 g l −1 at 20 ° C) |
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| As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . | |||||||||||||||||||
Magnesium hydrogen phosphate , also known as phosphoric acid magnesia, is a chemical compound of magnesium . It has the formula MgHPO 4 · 3 H 2 O and belongs to the hydrogen phosphate group .
properties
Magnesium hydrogen phosphate is a colorless, crystalline powder that does not occur naturally in its pure form. This also applies to other magnesium phosphate derivatives.
description
Magnesium hydrogen phosphate is obtained industrially from sodium phosphate and magnesium sulfate heptahydrate . It is difficult to dissolve in water , but it dissolves well in dilute acids . From a temperature of 205 ° C it decomposes, releasing water and magnesium pyrophosphate (Mg 2 P 2 O 7 ).
Occurrence
In the human body, magnesium hydrogen phosphate is found in the brain , teeth , nerves , spinal cord , blood cells , muscles and bones . In food it is found in all green vegetables (part of the leafy greens ), fruit (for example bananas ) and grains .
use
Magnesium phosphates are used in industry as a ceramic raw material and as a flame retardant .
In the food industry, magnesium phosphates are used as a feed additive , laxative and food additive. They are added to foods as acidity regulators and / or release agents. They are approved in the EU as a food additive with the number E 343, depending on the food, with maximum quantity restrictions of up to 5 grams (for cream products), and up to 30 grams per kilogram for coffee whiteners .
Magnesium monohydrogen phosphate ( Magnesium phosphoricum ) is a component of alternative medicinal products such as the Schuessler salts .
Related links
Magnesium phosphates also exist in other constellations:
- Trimagnesium phosphate Mg 3 (PO 4 ) 2 , molar mass: 262.88 g · mol −1 ; white, water-insoluble powder
- Magnesium dihydrogen phosphate Mg (H 2 PO 4 ) 2 , molar mass: 218.28 g · mol −1 ; hygroscopic , white, water-soluble powder
- Magnesium diphosphate Mg 2 P 2 O 7 , molar mass: 222.57 g · mol −1 ; white, water-insoluble powder, also called magnesium pyrophosphate
Individual evidence
- ↑ Entry on E 343: Magnesium phosphates in the European database for food additives, accessed on June 27, 2020.
- ↑ a b c d e f g Data sheet magnesium hydrogen phosphate (PDF) from Merck , accessed on December 26, 2019.
- ↑ External identifiers or database links for magnesium hydrogen phosphate trihydrate : CAS number: 7782-75-4, EC number: 616-511-2, ECHA InfoCard: 100.112.128 , PubChem : 16204530 , ChemSpider : 15794425 , Wikidata : Q3791964 .
- ↑ External identifiers or database links for magnesium dihydrogen phosphate : CAS number: 13092-66-5, EC number: 236-004-6, ECHA InfoCard: 100.032.716 , GESTIS substance database : 125984 , PubChem : 6096959 , ChemSpider : 451008 , Wikidata : Q4161317 .
- ↑ External identifiers or database links for magnesium diphosphate trihydrate : CAS number: 10102-34-8, PubChem : 71586935 , ChemSpider : 32699453 , Wikidata : Q27276826 .