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Magnesium Stearate

Product Name Magnesium Stearate Powder
Other Names Magnesium octadecanoate, Magnesium distearate, E470b (European food additive number), Octadecanoic acid, magnesium salt, Stearic acid, magnesium salt, MAG (abbreviation)
CAS Number 557-04-0
Molecular Formula C36H70MgO4
Molecular Weight 591.27 g/mol
Applications Personal Care, Dietary Supplements, Functional Foods, Animal Nutrition, etc.
Package 1kg, 5kg/bag, 25kg/drum


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Magnesium Stearate

What Is Magnesium Stearate?

Magnesium stearate is a compound that consists of magnesium and stearic acid. It is commonly used as an additive in various industries, including pharmaceuticals, food, and cosmetics.

This ingredient is a white, powdery substance with a waxy texture. It is primarily used as a lubricant and flow agent in manufacturing tablets, capsules, and powdered products.

And Magnesium stearate is generally considered safe for consumption and has a long history of use in various products.

Common Pure Bulk Magnesium Stearate Specifications

≥ 98% pure Magnesium Stearate Powder is the most common and widely used specification.

AppearanceWhite, waxy
Content≥ 99.5
Purity≥ 98
Particle Size< 100 mesh
CertificationsISO 9001
Other IngredientNone
Water Content≤ 1.0
Test MethodUSP, EP
MOQ (minimum order quantity)1kg
SampleAvailable (10-20g/bag)
OEM ServiceAvailable, such as capsules, tablets, pills, etc.
ODM ServiceAvailable
Private LabelAvailable
Contract ManufacturingAvailable

What Is The Best Source Of Magnesium Stearate Powder?

The most common source of this ingredient is industrial production. Magnesium stearate powder is typically synthesized by reacting between magnesium salts, such as magnesium hydroxide or magnesium oxide, and stearic acid derived from plant or animal fats.

What Is Magnesium Stearate Powder Manufacturing Process?

Step 1: Saponification

The procedure commences with the saponification of stearic acid, obtained from either plant or animal fats, utilizing an alkaline solution with components that includes sodium hydroxide or potassium hydroxide. This reaction forms a magnesium salt known as magnesium stearate.

Step 2: Precipitation

Magnesium stearate is then precipitated from the solution by adding a soluble magnesium salt, such as magnesium chloride or sulfate. Adding the magnesium salt causes the magnesium stearate to separate as a solid.

Step 3: Filtration

The precipitated magnesium stearate is filtered to remove any remaining liquid or impurities. This step helps to obtain a purer form of magnesium stearate.

Step 4: Drying

The filtered magnesium stearate is dried to remove any residual moisture. Drying can be achieved through various methods, such as air drying or drying ovens, to ensure the powder is free-flowing and has a low moisture content.

Step 5: Milling

The dried magnesium stearate may be milled to reduce the particle size and ensure a uniform and delicate powder. This step helps improve the dispersibility and flow characteristics of the magnesium stearate powder.

Step 6: Packaging

The final step involves packaging the magnesium stearate powder into suitable containers, such as bags or drums, to maintain its quality and facilitate storage and transportation.

Magnesium Stearate Powder Manufacturing Process

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What is Magnesium Stearate used for?

Magnesium stearate has a wide range of applications across various industries. For example,

  • Pharmaceutical Industry

Magnesium stearate is extensively used in the pharmaceutical industry as an excipient, an inactive ingredient added to medications. It is a lubricant and flow agent in manufacturing tablets, capsules, and powders. It helps prevent ingredients from sticking to the manufacturing equipment and aids in the proper flow and compression of the medication.

  • Food Industry

In the food industry, magnesium stearate is a food additive. It is used as an anticaking agent, preventing ingredients from clumping together, and as a lubricant in producing various food products, including powders, snacks, and baking mixes.

  • Cosmetics and Personal Care Products

Magnesium stearate is utilized to formulate cosmetics and personal care products, such as makeup, creams, lotions, and powders. It helps improve the texture, stability, and spreadability of these products.

  • Industrial Applications

Magnesium stearate finds applications in various industrial processes. It is a release agent to produce rubber and plastic products to prevent sticking. It is also used as a lubricant and mold release agent to manufacture candles, ceramics, and other materials.

  • Magnesium Supplements

Magnesium stearate may be used as an ingredient in dietary supplements. It can help improve the flow and uniformity of powdered supplements and aid in encapsulation.

Who is the top Magnesium Stearate Supplier?

Nutri Avenue is a good choice for magnesium stearate supply. As an experienced raw ingredients supplier, we have a set of professional and regular production processes that match the FDA standards to manufacture Magnesium Stearate powder. Welcome to get a free quote.


No, magnesium stearate is not naturally occurring. It is synthesized through a chemical process.

No, magnesium stearate is not water-soluble. It is a hydrophobic substance that does not readily dissolve in water.

Yes, magnesium stearate is generally considered safe for use in supplements. It has a long history of service in the pharmaceutical and supplement industry, and regulatory authorities have deemed it safe for consumption in appropriate quantities.

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