Magnesium Citrate

Anhydrous Magnesium Citrate BP Ph Eur Grade

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.

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 Ph Eur Grade

Mg3(C6H5O7)2,9H2O --- 613 --- CAS 153531-96-5
Ph Eur

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.

Magnesium Citrate USP

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. (The method is described in Magnesium Carbonate & Magnesium Citrate Monograph.
Assay— Weigh accurately about 400 mg of the substance, dissolve in 50 mL of water, add 20 mL of ammonia–ammonium chloride buffer TS and 0.1 mL of eriochrome black TS, and titrate with 0.05 M edetate disodium VS to a blue endpoint. Perform a blank determination, and make any necessary correction. From the volume of 0.05 M edetate disodium consumed, deduct the volume of 0.05 M edetate disodium corresponding to the amount of calcium in the portion of Magnesium Citrate taken, based on the amount of calcium found in the test for Limit of calcium. Each mg of calcium (Ca) is equivalent to 0.25 mL of 0.05 M edetate disodium. The difference is the volume of 0.05 M edetate disodium consumed by the magnesium. Each mL of 0.05 M edetate disodium is equivalent to 1.215 mg of magnesium (Mg).

We also manufacture and supply micro-encapsulated Magnesium Citrate.

Certifications :
We manufacture Bulk Drugs / API, Excipients, Pharmaceuticals (IP/BP/USP/NF/Ph. Eur, JP/ CP), Speciality Chemicals(Pure/AR/ACS), Mineral Fortifiers, Food Chemical Codex (FCC) and Flavour chemicals. Our manufacturing facility is cGMP, GLP, ISO 9001, ISO 14001, ISO 22000, ISO/IEC 17025, FSSC 22000, FSSAI, Kosher, HALAL, EXCiPACT, WC, COPP, WHO-GMP and WC certified. We are also REACH registered for export to European countries.