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415057

Sigma-Aldrich

Magnesium stearate

technical grade

Synonym(s):
Stearic acid magnesium salt
Linear Formula:
[CH3(CH2)16CO2]2Mg
CAS Number:
Molecular Weight:
591.24
Beilstein:
3919702
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.22

grade

technical grade

Quality Level

composition

palmitate salt, 25%
stearate salt, 65%

mp

200 °C (lit.)

SMILES string

CCCCCCCCCCCCCCCCCC(=O)O[Mg]OC(=O)CCCCCCCCCCCCCCCCC

InChI

1S/2C18H36O2.Mg/c2*1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20;/h2*2-17H2,1H3,(H,19,20);/q;;+2/p-2

InChI key

HQKMJHAJHXVSDF-UHFFFAOYSA-L

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General description

Magnesium stearate (Mg-St) is the magnesium salt of stearic acid. Its anhydrate, dihydrate and trihydrate forms have been prepared. The tabletting of the blends of magnesium stearate and lactose granules has been described. The influence of mixing time on hardness, disintegration time and ejection force on the compressed tablets was examined. Mg-St is widely used lubricant in pharmaceutical industry. It also plays a role in delaying the process of dissolution. Its detection in tablets by laser-induced breakdown spectroscopy has been proposed.

Application

Magnesium stearate may be used as excipient in the formulations of diclofenac sodium tablets. It may be used for the preparation of tramadol HCl matrix tablets.

Packaging

1 kg in poly drum
25 g in poly bottle

Storage Class Code

13 - Non Combustible Solids

WGK Germany

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

Certificate of Analysis

Certificate of Origin

Louis St-Onge et al.
Journal of pharmacy & pharmaceutical sciences : a publication of the Canadian Society for Pharmaceutical Sciences, Societe canadienne des sciences pharmaceutiques, 8(2), 272-288 (2005-08-30)
Laser-induced breakdown spectroscopy (LIBS) was evaluated for its potential as a process analytical tool for the rapid determination of magnesium stearate (MgSt) distribution within and between tablets as well as between batches in a typical manufacturing run, and for the...
Jaleh Varshosaz et al.
AAPS PharmSciTech, 7(1), E24-E24 (2006-04-06)
The objective of this work was to develop matrix sustained-release tablets of highly water-soluble tramadol HCl using natural gums (xanthan [X gum] and guar [G gum]) as cost-effective, nontoxic, easily available, and suitable hydrophilic matrix systems compared with the extensively...
Effect of mixing time on the lubricating properties of magnesium stearate and the final characteristics of the compressed tablets.
Kikuta J-I and Kitamori N.
Drug Development and Industrial Pharmacy, 20(3), 343-355 (1994)
Paola Bertocchi et al.
Journal of pharmaceutical and biomedical analysis, 37(4), 679-685 (2005-03-31)
The aim of this work was to compare the dissolution behaviour of six diclofenac sodium prolonged release tablets of different brands obtained from the national market. The formulations contain the same amount of drug substance but different types and/or amount...
Physical characterization of the polymorphic variations of magnesium stearate and magnesium palmitate hydrate species.
Sharpe SA, et al.
Structural Chemistry, 8(1), 73-84 (1997)

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