Magnesium Oxide Specifications of Commercial Pure & BP Ph Eur USP IP Analytical Reagent FCC Food Grade & Micro-Encapsulated Magnesium Oxide Manufacturers & Exporters
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Magnesium Oxide CAS Number 1309-48-4
Micro-Encapsulated Magnesium Oxide
Magnesium Oxide USP Grade Specifications:
MgO 40.30
Magnesium oxide CAS 1309-48-4
DEFINITION
Magnesium Oxide, after ignition, contains NLT 96.0% and NMT 100.5% of magnesium oxide (MgO).
IDENTIFICATION
A. Identification Tests-General, Magnesium: A solution in diluted hydrochloric acid meets the requirements.
ASSAY
To pass the test.
Acceptance criteria: 96.0% to 100.5% after ignition.
Free Alkali and Soluble Salts:
Sample solution: Boil 2.0 g with 100 mL of water for 5 min in a covered beaker, and filter while hot. Allow to cool and dilute with water to 100 mL.
Analysis 1: To 50 mL of the Sample solution add methyl red and titrate with 0.10 N sulfuric acid.
Acceptance criteria 1: NMT 2.0 mL of the acid is consumed.
Analysis 2: Evaporate 25 mL of the remaining Sample solution to dryness, and dry at 105C for 1 h.
Acceptance criteria 2: NMT 10 mg of residue remains (NMT 2.0%).
Acid-Insoluble Substances:
Sample: 2 g
Analysis: Mix the Sample with 75 mL of water, add hydrochloric acid in small portions with agitation until no more dissolves, and boil for 5 min. If an insoluble residue remains, filter, wash well with water until the last washing is free from chloride, and ignite.
Acceptance criteria: The weight of the ignited residue is NMT 2 mg (NMT 0.1%).
Limit of Calcium: to pass the test.
Iron: to pass the test. --- NMT 0.05%
Loss on Ignition:
Sample: 500–1000 mg
Analysis: Transfer the Sample to a tared platinum crucible and ignite in the temperature range of (800C to 900C) ± 25C to constant weight.
Acceptance criteria: NMT 10.0%
Bulk Density and Tapped Density of Powders, Bulk Density: Using the procedure specified in the chapter, determine the bulk density of Magnesium Oxide.
Packaging and Storage: Preserve in tight containers.
Heavy Magnesium Oxide BP Ph Eur Grade Specifications
Ph Eur
MgO --- 40.30 CAS 1309-48-4
Action and use: Antacid; osmotic laxative.
DEFINITION
Content: 98.0 per cent to 100.5 per cent of MgO (ignited substance).
CHARACTERS
Appearance: Fine, white or almost white powder.
Solubility: Practically insoluble in water. It dissolves in dilute acids with at most slight effervescence.
IDENTIFICATION
A. 15 g has an apparent volume (2.9.15) before settling of not more than 60 ml.
B. Dissolve about 15 mg in 2 ml of dilute nitric acid R and neutralise with dilute sodium hydroxide solution R. The solution gives the reaction of magnesium.
C. Loss on ignition (see Tests).
TESTS
Solution S: Dissolve 5.0 g in a mixture of 30 ml of distilled water and 70 ml of acetic acid, boil for 2 min, cool and dilute to 100 ml with dilute acetic acid. Filter, if necessary, through a previously ignited and tared porcelain or silica filter crucible of suitable porosity to give a clear filtrate.
Appearance of solution: Solution S is not more intensely coloured than reference.
Soluble substances: Maximum 2.0 per cent.
To 2.00 g add 100 ml of water and boil for 5 min. Filter whilst hot through a sintered-glass filter (40) (2.1.2), allow to cool and dilute to 100 ml with water. Evaporate 50 ml of the filtrate to dryness and dry at 100-105C. The residue weighs a maximum of 20 mg.
Substances insoluble in acetic acid: Maximum 0.1 per cent.
Any residue obtained during the preparation of solution S, washed, dried, and ignited at 600 ±50C, weighs a maximum of 5 mg.
Chlorides: Maximum 0.1 per cent.
Sulphates: Maximum 1.0 per cent.
Arsenic: Maximum 4 ppm, determined on 5 ml of solution S.
Calcium: Maximum 1.5 per cent.
Iron: Maximum 0.07 per cent.
Heavy metals: Maximum 30 ppm.
Loss on ignition: Maximum 8.0 per cent, determined on 1.00 g at 900 ± 25C.
Specifications of Light Magnesium Oxide BP Ph Eur Grade
Light Magnesia
MgO -- 40.30 -- CAS 1309-48-4
Action and use: Antacid; osmotic laxative.
DEFINITION
Content: 98.0 per cent to 100.5 per cent of MgO (ignited substance).
CHARACTERS
Appearance: Fine, white or almost white, amorphous powder.
Solubility: Practically insoluble in water. It dissolves in dilute acids with at most slight effervescence.
IDENTIFICATION
A. 15 g has an apparent volume (2.9.15) before settling of at least 100 ml.
B. Dissolve about 15 mg in 2 ml of dilute nitric acid and neutralise with dilute sodium hydroxide solution. The solution gives the reaction of magnesium.
C. Loss on ignition (see Tests).
TESTS
Solution S: Dissolve 5.0 g in a mixture of 30 ml of distilled water and 70 ml of acetic acid, boil for 2 min, cool and dilute to 100 ml with dilute acetic acid. Filter, if necessary, through a previously ignited and tared porcelain or silica filter crucible of a suitable porosity to give a clear filtrate.
Appearance of solution: Solution S is not more intensely coloured than reference solution.
Soluble substances: Maximum 2.0 per cent.
Substances insoluble in acetic acid: Maximum 0.1 per cent.
Chlorides: Maximum 0.15 per cent.
Sulphates: Maximum 1.0 per cent.
Arsenic: Maximum 4 ppm, determined on 5 ml of solution S.
Calcium: Maximum 1.5 per cent.
Iron: Maximum 0.1 per cent.
Heavy metals: Maximum 30 ppm.
Loss on ignition: Maximum 8.0 per cent, determined on 1.00 g at 900 ± 25C.
Light Magnesium Oxide IP Grade Specifications
Light Magnesia
MgO ---- Molecular Weight.40.30
Category: Antacid, Osmotic Laxative.
Description: Very fine, light, white powder, odourless. 15g occupies a volume of about 150ml.
Solubility: Practically insoluble in water, insoluble in ethanol(95%).It dissolves in dilute acids with at most slight effervescence.
STANDARDS:
Light Magnesium Oxide contains not less than 98.0 per cent and not more than 100.5per cent of MgO, Calculated with reference to the substance ignited at 900C.
Identification:
Arsenic; Heavy metals; Sulphates; Calcium; Soluble substances; Substances insoluble in acetic acid ; Loss on ignition: Complies with the requirements stated under Heavy Magnesium Oxide using, where appropriate, solution A and residue R prepared as described therein.
Colour of Solution: Prepare Solution A and residue R as described in the test for colour of solution under Heavy Magnesium Carbonate. Solution A is not more than intensely Coloured than reference solution.
Iron: Solution complies with the limit test for iron, Appendix 3.13 (0.1%).
Chloride: 4.0ml of solution A complies with the limit test for chlorides, Appendix 3.10(0.125%)
Magnesium Oxide FCC Food Grade Specifications
MgO Formula weight 40.30
INS: 530 CAS 1309-48-4
DESCRIPTION
Magnesium Oxide occurs as a very bulky, white powder known as Light Magnesium Oxide or as a relatively dense, white powder known as Heavy Magnesium Oxide. Five grams of Light Magnesium Oxide occupies a volume of approximately 40 to 50 mL, while 5 g of Heavy Magnesium Oxide occupies a volume of approximately 10 to 20 mL. It is soluble in dilute acids, practically insoluble in water, and insoluble in alcohol.
Function: pH control; neutralizer; anticaking agent; freeflowing agent; firming agent.
REQUIREMENTS
Labeling: Indicate whether it is Light Magnesium Oxide or Heavy Magnesium Oxide.
Identification: A solution of sample in 2.7 N hydrochloric acid gives positive tests for Magnesium.
Assay: Not less than 96.0% and not more than 100.5% of MgO after ignition.
Acid-Insoluble Substances: Not more than 0.1%.
Alkalies (Free) and Soluble Salts: Passes test.
Arsenic: Not more than 3 mg/kg.
Calcium Oxide: Not more than 1.5%.
Lead: Not more than 4 mg/kg.
Loss on Ignition: Not more than 10.0%.
Specifications of Magnesium Oxide Analytical Reagent Grade
MgO
Formula Weight 40.30
CAS Number 1039-48-4
REQUIREMENTS
Assay: 95.0% MgO
MAXIMUM ALLOWABLE
Insoluble in dilute hydrochloric acid: 0.02%
Water-soluble substances: 0.4%
Loss on ignition: 2.0%
Ammonium hydroxide precipitate: 0.02%
Chloride (Cl): 0.01%
Nitrate (NO3): 0.005%
Sulfate and sulfite (as SO4): 0.02%
Barium (Ba): 0.005%
Calcium (Ca): 0.05%
Manganese (Mn): 5 ppm
Potassium (K): 0.005%
Sodium (Na): 0.5%
Strontium (Sr): 0.005%
Heavy metals (as Pb): 0.003%
Iron (Fe): 0.01%
Specifications of Micro-encapsulated Magnesium Oxide:
Assay of Magnesium Oxide: 80%.
Assay of coating medium: Balance.
SDS MSDS of Magnesium Oxide BP Ph Eur EP JP USP NF IP ACS Analytical Reagent FCC Food grade & Micro-Encapsulated Magnesium Oxide Manufacturers |
