Finoric LLC

Magnesium Citrate

Magnesium Citrate Commercial Pure & USP Grade Supplier Manufacturer's Representative

CAS number : 3344-18-1
EINECS EC code number: 231-923-9
Molecular Weight: 451.11
Chemical Formula: C12H19Mg3-O14

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DESCRIPTION

Magnesium Citrate USP Grade Specifications
Description: A white granular powder
Solubility: Soluble in water, practically insoluble in ethanol (96 %). Dissolves in dilute hydrochloric acid
Identification: As per test A and B of the U.S.P.
pH value of 5 % w/v suspension: Between 5.0 and 9.0
Chloride: Not more than 0.05 %
Sulfate: Not more than 0.2 %
Arsenic: Not more than 3 μg per g
Heavy metals: Not more than 50 μg per g
Iron: Not more than 200 μg per g
Limit of Calcium: Not more than 1.0 %
Loss on drying (at 135 °C for 16 hour): Not more than 2.0 %
Assay (on dry basis): Between 14.5 and 16.4 % of Mg.

Anhydrous Magnesium Citrate BP Grade
Ph Eur
Formula: Mg3(C6H5O7)2
Weight: 451.1
CAS Number: 3344-18-1

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.

ASSAY
Dissolve 0.150 g in 50 mL of water. Carry out the complexometric titration of  magnesium. 1 mL of 0.1 M sodium edetate is equivalent to 2.431 mg of Mg.

STORAGE
In a non-metallic, airtight container.

Magnesium Citrate Dodecahydrate BP Ph Eur Grade
Mg3(C6H5O7)2,xH2O --- 451.1 (anhydrous substance)
with x ≈ 12
Ph Eur

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.

ASSAY
Dissolve 0.200 g in 5 mL of dilute hydrochloric acid with heating. Cool and add 50  mL of water. Adjust to pH 7.0 with ammonia. Carry out the complexometric  titration of magnesium. 1 mL of 0.1 M sodium edetate is equivalent to 2.431 mg of Mg.

Magnesium Citrate Nonahydrate BP Grade
Ph Eur
Formula: Mg3(C6H5O7)2,9H2O
Weight: 613
CAS Number: 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.

ASSAY
Dissolve 0.200 g in 5 mL of dilute hydrochloric acid with heating. Cool and add 50  mL of water. Adjust to pH 7.0 with ammonia. Carry out the complexometric  titration of magnesium). 1 mL of 0.1 M sodium edetate is equivalent to 2.431 mg of Mg.


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