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MAGNESIUM STEARATE
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JMB produces both commercial and high-purity grades of magnesium stearate.
The specification for the commercial grade is as follows :-
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Parameter
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Limit(s)
|
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Ash
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7.5 - 8.5 %
|
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Free fatty acid
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2 % maximum
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Moisture
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4.0 % maximum
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Bulk density
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0.25 g cm-3 max
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JMB can supply high-purity magnesium stearate conforming to the BP 1999 specification
:-
|
Parameter
|
Limits
|
|
Assay (on dried material)
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3.8 - 5.0 % Mg
|
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Acid value of organic acid
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195 - 210
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Melting point of organic acid
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> 53 ºC
|
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Chlorides
|
passes BP 1999 test
|
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Sulphates
|
passes BP 1999 test
|
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Moisture
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< 6.0 %
|
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Heavy metal content
|
< 20 ppm Pb
|
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Acidity / alkalinity
|
passes BP test
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Lastly, we can now supply material conforming to the current EP 6.0§ specification :-
|
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Parameter
|
Limits
|
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Acidity / alkalinity
|
passes test
|
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Chloride
|
0.1 % max
|
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Sulphate
|
0.5 % max
|
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Cadmium
|
3 ppm max
|
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Lead
|
10 ppm max
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Nickel
|
5 ppm max
|
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Loss on drying
|
6 % max
|
|
Total viable aerobic count
|
1000 micro-organisms / g max
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E. coli
|
passes test
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Magnesium
|
4.0 - 5.0 %
|
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Fatty acid composition
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>= 40 % stearic acid
>= 90 % stearic + palmitic acid
|
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Fatty acid melting point
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>= 53 °C
|
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Acid value of fatty acid
|
195 - 210
|
|
§ the EP 6.0 specification is only a minor amendment to EP 5.0, not affecting specification limits
These materials have been approved as Kosher by the Manchester Beth-Din.
Normal packaging is in 20 kg nett multi-wall paper sacks,
though material can be supplied in fibre drums if required.
This page was last updated on 22nd May 2009
© James M. Brown Limited 2009
