Metamizole magnesium

CAS NO: 63372-86-1

Specification: Enter. Standard

Product Name Metamizole magnesium
Quality Standard Enter. Standard


Testing Items Critrion
Appearance White or almost white crystalline powder
Odor Almost odorless
Solubility Free dissolve in water and methanol, dissolve in ethanol
Identification IR  meets
UV meets
Reaction with H2O2 Blue color turns to red
Magnesium id. White prcipitate
Appearance of solution Clarity of solution  NMT Suspension I
Color of solution   NMT Grade 5
Color stability test NMT grade 7
Acidity or alkalinity NMT 0.1ml NaOH 0.02mol/0.25g
Loss on drying 13.5%-15.5%
Sulphates ≤0.1%
Heavy metals ≤20ppm
Related substances Impurity A ≤0.2%
Impurity B ≤0.2%
Impurity C ≤0.5%
Impurity D ≤0.2%
Any other impurity ≤0.2%
Total Impurities   ≤0.5%
Residue Solvents Methanol ≤0.3%
Ethanol  ≤0.5%
Assay Metamizole 98.0-102.0% on dry basis
Magnesium 3.16%-3.29% refered to hexahydrate


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