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Magnesium stearate CAS 557-04-0

Magnesium stearate, also known as magnesium octadecanoate, is a fatty acid salt-type anionic surfactant, with the appearance of white fine powder, slightly peculiar odor and slippery feeling. It is soluble in hot aliphatic hydrocarbons, hot aromatic hydrocarbons, hot oils and fats, but insoluble in alcohols and water, and decomposes into stearic acid and the corresponding magnesium salt when encountering strong acid. Magnesium stearate has good adhesion performance to skin, good lubrication, used in cosmetics for powder products, can enhance adhesion, lubrication.


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Model:
557-04-0
Brand:
boss chem
Code:
557-04-0

Product Description

Magnesium stearate

CAS No.557-04-0

Alias: stearatedemagnesium;MAGNESIUM STEARATE;MAGNESIUM OCTADECANOATE;MAGENSIUM STEARATE;STEARIC ACID MAGNESIUM SALT;OCTADECONIC ACID MAGNESIUM SALT;OCTADECANOIC ACID MAGNESIUM SALT;Magnesium Stearate Bp

Molecular formula: C36H70MgO4

Relative molecular mass: 591.24

Structural formula:

1. Performance and use:

Magnesium stearate is a kind of fatty acid salt type anionic surfactant with its appearance being white powder with slight special smell and creamy feeling. It can be soluble in hot aliphatic hydrocarbons, hot arene and hot grease but insoluble in alcohol and water with being decomposed into stearic acid and corresponding magnesium salts in case of acid.

Magnesium stearate can be used as PVC heating stabilizers with the stability performance being similar to calcium stearate and can be combined with zinc or calcium soaps for being applied to food packaging material but without very wide application.

Magnesium stearate can be used as a mold releasing agent of plastic products, face powder of cosmetics, the raw material of skin ointment, the powder molding tablet of pharmaceutical tablets and translucent flatting agent of paint.

Magnesium stearate is also commonly used as an inactive ingredient in the production of pharmaceutical tablets, capsules and powders.

2. Technical indicators

Magnesium stearate Basic information
Product Name:	Magnesium stearate
Synonyms:	stearatedemagnesium;MAGNESIUM STEARATE;MAGNESIUM OCTADECANOATE;MAGENSIUM STEARATE;STEARIC ACID MAGNESIUM SALT;OCTADECONIC ACID MAGNESIUM SALT;OCTADECANOIC ACID MAGNESIUM SALT;Magnesium Stearate Bp
CAS:	557-04-0
MF:	C36H70MgO4
MW:	591.24
EINECS:	209-150-3
Mol File:	557-04-0.mol
Magnesium stearate Structure
Melting point	200 °C (lit.)
density	1.028g/cm3
storage temp.	Inert atmosphere,Room Temperature
solubility	alcohol: insoluble
form	Fine Powder
color	White
PH	7 (H2O) (slurry)
Water Solubility	Insoluble
Merck	145,690
BRN	3919702
Exposure limits	ACGIH: TWA 10 mg/m3; TWA 3 mg/m3
Stability:	Stable. Incompatible with strong oxidizing agents.
InChIKey	DRJIJXNWSSRTTE-UHFFFAOYSA-M
CAS DataBase Reference	557-04-0(CAS DataBase Reference)
EPA Substance Registry System	Magnesium stearate (557-04-0)

COA

Item	Specification	Test Result
Appearance	White Fine Powder	Pass
Magnesium Oxide	40-43.5%	42.5%
Calcium	0.30% max.	0.05%
Acid Insoluble Matter	0.05% max.	0.02%
Iron	50 ppm max.	<15 ppm
Soluble Salt	1.0% max.	0.2%
Sulphates	0.3% max.	0.05%
Chlorides	0.035% max.	0.02%
Arsenic	1 ppm max.	< 1 ppm
Lead	1 ppm max.	< 1 ppm
Mercury	0.5 ppm max.	< 0.5 ppm
Bulk Density, g/cm3	0.55 - 0.7	0.65
Residue on 100-mesh sieve	0.3% max.	0.02%

3. Packaging and storage

Magnesium stearate solid is packaged in plastic woven bags lined with polyethylene bags, with a net weight of 25kg per bag, which can also be determined according to user needs.

Store in a cool and ventilated place indoors, avoid moisture and exposure, and the storage period is twelve months.

4. Safety protection

Slightly toxic by ingestion. Spontaneously combustible. When heated to decomposition it emits acrid smoke and toxic fumes.

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