Magnesium Citrate Anhydrous Nonahydrate Dodecahydrate Specifications of Commercial Pure & BP Ph Eur USP Food Grade Manufacturers & Exporters
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Magnesium Citrate CAS Anhydrous or xH2O Number 3344-18-1
Magnesium Citrate Nonahydrate 153531-96-5
Magnesium Citrate Dodecahydrate
Magnesium Citrate USP Grade Specifications
C12H10Mg3O14 --- 451.11
1,2,3-Propanetricarboxylic acid, hydroxy-, magnesium salt (2:3).
Magnesium citrate (3:2) [CAS 3344-18-1].
Magnesium Citrate contains not less than 14.5 percent and not more than 16.4 percent of magnesium (Mg), calculated on the dried basis.
Labeling: Magnesium Citrate that loses not more than 2.0% of its weight in the test for Loss on drying may be labeled as Anhydrous Magnesium Citrate.
Identification:
A: A solution (10 mg per mL) responds to the tests for Magnesium.
B: A solution (80 mg per mL) responds to the tests for Citrate.
pH: between 5.0 and 9.0, in a suspension (50 mg per mL).
Loss on drying: Dry 1 g in a mechanical convection oven at 135 for 16 hours, then to constant weight: it loses not more than 29% of its weight, except that where it is labeled as anhydrous, it loses not more than 2.0% of its weight.
Chloride: A 300-mg portion shows no more chloride than corresponds to 0.20 mL of 0.020 N hydrochloric acid (0.05%).
Sulfate: A 100-mg portion shows no more sulfate than corresponds to 0.20 mL of 0.020N sulfuric acid (0.2%).
Arsenic: 3 6g per g.
Heavy metals: Dissolve 0.4 g in 25 mL of water, and proceed as directed for Test Preparation, except to use glacial acetic acid to adjust the pH: the limit is 50 6g per g.
Iron: Boil 50 mg with 5 mL of 2 N nitric acid for 1 minute. Cool, dilute with water to 45 mL, add 2 mL of hydrochloric acid, and mix: the limit is 200 6g per g.
Limit of calcium: the limit is 1.0%, calculated on the dried basis.
Anhydrous Magnesium Citrate BP Ph Eur Grade Specifications
Mg3(C6H5O7)2 --- 451.1 --- CAS 3344-18-1
Ph Eur
DEFINITION
Trimagnesium bis(2-hydroxypropane-1,2,3-tricarboxylate).
Content: 15.0 per cent to 16.5 per cent of Mg (dried substance).
CHARACTERS
Appearance: White or almost white, fine, slightly hygroscopic powder.
Solubility: Soluble in water, practically insoluble in ethanol (96 per cent). It dissolves in dilute hydrochloric acid.
IDENTIFICATION
A. It gives the reaction of citrates.
B. It gives the reaction of magnesium.
C. pH (see Tests).
D. Loss on drying (see Tests).
TESTS
Solution S: Dissolve 5.0 g in carbon dioxide-free water R, heating at 60C, cool and dilute to 100 mL with the same solvent.
Appearance of solution: Solution S is not more opalescent than reference suspension and not more intensely coloured than reference solutions.
pH: 6.0 to 8.5 for solution S.
Oxalates: Maximum 280 ppm.
Sulfates: Maximum 0.2 per cent.
Calcium: Maximum 0.2 per cent.
Iron: Maximum 100 ppm.
Heavy metals: Maximum 10 ppm.
Loss on drying: Maximum 3.5 per cent, determined on 1.000 g by drying in an oven at 180±10C for 5 h.
Specifications of Magnesium Citrate Dodecahydrate BP Ph Eur Grade
Mg3(C6H5O7)2-xH2O --- 451.1 (anhydrous substance)
with x ≈ 12
DEFINITION
Trimagnesium bis(2-hydroxypropane-1,2,3-tricarboxylate) dodecahydrate.
Content: 15.0 per cent to 16.5 per cent of Mg (dried substance).
CHARACTERS
Appearance: White or almost white, fine powder.
Solubility: Sparingly soluble in water, practically insoluble in ethanol (96 per cent). It dissolves in dilute hydrochloric acid.
IDENTIFICATION
A. It gives the reaction of citrates.
B. It gives the reaction of magnesium.
C. Loss on drying (see Tests).
TESTS
Solution S: Dissolve 2.5 g in 15 mL of dilute hydrochloric acid with heating. Cool and dilute to 100 mL with distilled water.
Appearance of solution: Solution S is clear and not more intensely coloured than reference solution.
pH: 6.0 to 8.5.
Oxalates: Maximum 280 ppm.
Sulfates: Maximum 0.2 per cent.
Calcium: Maximum 0.2 per cent.
Iron: Maximum 100 ppm.
Heavy metals: Maximum 10 ppm.
Loss on drying: 29.0 per cent to 36.0 per cent, determined on 1.000 g by drying in an oven at 180±10C for 5 h.
Specifications or Magnesium Citrate Nonahydrate BP Grade
Mg3(C6H5O7)2-9H2O --- 613 --- CAS 153531-96-5
DEFINITION
Trimagnesium bis(2-hydroxypropane-1,2,3-tricarboxylate) nonahydrate.
Content: 15.0 per cent to 16.5 per cent of Mg (dried substance).
CHARACTERS
Appearance: White or almost white, fine powder.
Solubility: Sparingly soluble in water, practically insoluble in ethanol (96 per cent). It dissolves in dilute hydrochloric acid.
IDENTIFICATION
A. It gives the reaction of citrates.
B. It gives the reaction of magnesium (2.3.1).
C. Loss on drying (see Tests).
TESTS
Solution S: Dissolve 2.5 g in 15 mL of dilute hydrochloric acid with heating. Cool and dilute to 100 mL with distilled water.
Appearance of solution: Solution S is clear and not more intensely coloured than reference solution.
pH: 6.0 to 8.5.
Oxalates: Maximum 280 ppm.
Sulfates: Maximum 0.2 per cent.
Calcium: Maximum 0.2 per cent.
Iron: Maximum 100 ppm.
Heavy metals: Maximum 10 ppm.
Loss on drying: 24.0 to 28.0 per cent, determined on 1.000 g by drying in an oven at 180±10C for 5 h. SDS MSDS of Magnesium Citrate Anhydrous Nonahydrate Dodecahydrate BP Ph Eur EP JP USP NF IP ACS Analytical Reagent FCC Food grade Manufacturers |
