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E470b MAGNESIUM SALTS OF FATTY ACIDS

E470b Magnesium salts of fatty acids are also used as an anti-caking agent and stabilizer.
E470b Magnesium salts of fatty acids are mainly employed as a thickening agent in the food industry, it has a greasy feel when in contact with the skin and is insoluble in water, ethanol, or ether.
E470b Magnesium salts of fatty acids are used to delay breakdown and absorption of medications, so they’re absorbed in the correct area of the bowel.

CAS Number (most common representative): 557-04-0
EC Number: 209-150-3
Molecular Formula (magnesium stearate): C₃₆H₇₀MgO₄
Molecular Weight: ~591.24 g/mol

SYNONYMS:
Magnesium stearate, magnesium octadecanoate, magnesium soap, fatty acid magnesium salts, E470b, magnesium salts of fatty acids, magnesium distearate (in mixtures), vegetable magnesium stearate, Magnesium octadecanoate, Magnesium salts of fatty acids, Magnesium distearate, Magnesium Stearate, E470b / INS 470(ii), Magnesium salts of fatty acids, Magnesium stearate (TR), magnesium fatty acid soap

The food additive E470b Magnesium salts of fatty acids, known as magnesium salts of fatty acids, is an emulsifier and stabilizer widely used in the food industry.
E470b Magnesium salts of fatty acids consist of magnesium salts derived from fatty acids, mainly stearic, palmitic, oleic, and lauric acids, obtained from vegetable sources (such as palm, coconut, or sunflower oil) or animal sources (beef or pork fats).
Industrially, E470b Magnesium salts of fatty acids are produced by saponification of fats and oils with magnesium hydroxide, followed by purification and drying.

E470b Magnesium salts of fatty acids are a white or slightly yellowish powder, insoluble in water but dispersible in fats, with a melting point between 50-80°C.
E470b Magnesium salts of fatty acids' main function is to act as an emulsifier, allowing the homogeneous mixing of ingredients that normally do not combine, such as water and oil.
The history of its use dates back to the mid-20th century, and E470b Magnesium salts of fatty acids were approved in the European Union after evaluations by EFSA (European Food Safety Authority) and WHO (World Health Organization).

Regarding food safety, E470b Magnesium salts of fatty acids are considered a safe additive, as fatty acids and magnesium are natural components of the diet.
No significant adverse effects in humans have been reported.
In labeling, E470b Magnesium salts of fatty acids must appear as 'magnesium salts of fatty acids' or with their E number.

It’s an additive made from E470b Magnesium salts of fatty acids.
E470b Magnesium salts of fatty acids is a fine white powder that sticks to your skin and is greasy to the touch.
E470b Magnesium salts of fatty acids are a simple salt made up of two substances, a saturated fat called stearic acid and the mineral magnesium.

Stearic acid can also be found in many foods, such as: chicken, eggs, cheese, chocolate, walnuts, salmon, cotton seed oil, palm oil, coconut oil.
E470b Magnesium salts of fatty acids are commonly added to many foods, pharmaceuticals, and cosmetics.
In medications and vitamins, E470b Magnesium salts of fatty acids' primary purpose is to act as a lubricant.

E470b Magnesium salts of fatty acids are an additive that’s primarily used in medication capsules.
E470b Magnesium salts of fatty acids are considered a “flow agent.”
E470b Magnesium salts of fatty acids prevent the individual ingredients in a capsule from sticking to each other and the machine that creates the capsules.

E470b Magnesium salts of fatty acids help improve the consistency and quality control of medication capsules.
It’s possible to create medication capsules without E470b Magnesium salts of fatty acids, but it’s more difficult to guarantee the consistency and quality of those capsules.
E470b Magnesium salts of fatty acids are an organic compound that appears as a white, sand-free fine powder.

E470b Magnesium salts of fatty acids are primarily produced in China by neutralising fatty acids with magnesium salts under appropriate conditions.
The resulting E470b Magnesium salts of fatty acids are then separated and purified, including filtering, washing and drying steps to remove unreacted raw materials and other impurities, before being milled into the final powdered product.

E470b Magnesium salts of fatty acids are a mixture of magnesium salts of fatty acids obtained from fats and oils usable in food (whether of animal or vegetable origin).
The product consists mainly of E470b Magnesium salts of fatty acids and palmitate in varying proportions, which is used as an additive in the food industry.
E470b Magnesium salts of fatty acids have the appearance of a white/off-white powder, very fine, with a greasy texture, practically insoluble in water, but soluble in ethanol and ether.

E470b Magnesium salts of fatty acids are a subtype of additive E470, which encompasses a group of fatty acid salts.
E470b Magnesium salts of fatty acids are used in accordance with the EU Regulation (EC) No 1333/2008.
In the international Codex Alimentarius standard "Class Names and the International Numbering System for Food Additives (CXG 36-1989)" it corresponds to additive INS 470(iii) — magnesium salts of fatty acids.

E470b Magnesium salts of fatty acids are obtained by reacting fatty acids with magnesium salts or hydroxides.
The chemical formula depends on the specific acid: for example, E470b Magnesium salts of fatty acids have the formula (C₁₇H₃₅COO)₂Mg, and magnesium palmitate — (C₁₅H₃₁COO)₂Mg.
In industry, E470b Magnesium salts of fatty acids are produced from natural fats and oils of plant or animal origin, most often from by-products of oil and fat processing.

The process involves saponification of fats, followed by the reaction to obtain magnesium salts and their purification.
E470b Magnesium salts of fatty acids are a fine white or slightly creamy powder, odorless, insoluble in water and most organic solvents.
E470b Magnesium salts of fatty acids have pronounced lubricating, anti-adhesive, and separating properties.

E470b Magnesium salts of fatty acids are a white, fine powder with hydrophobic properties, classified as E470b (magnesium salts of fatty acids) in the EU classification.
E470b Magnesium salts of fatty acids are generally added to the dry phase, either by sifting for homogeneous dispersion or, if possible, as a premix.
Due to E470b Magnesium salts of fatty acids' hydrophobic nature, fine dispersion (deagglomeration) is critical for flow performance.

Synergies may be observed with anti-caking agents such as silica/silicate.
The target level of E470b Magnesium salts of fatty acids should be optimized, as overdosing can leave a dull mouthfeel.
E470b Magnesium salts of fatty acids are a metal-organic compound, a salt of magnesium and stearic acid with the idealized chemical formula (C17H35CO2)2Mg.

E470b Magnesium salts of fatty acids are classified as a metallic soap, i.e. a metal derivative of a fatty acid.
E470b Magnesium salts of fatty acids are a white, water-insoluble powder.
In the EU and EFTA, E470b Magnesium salts of fatty acids are listed as food additive E470b.

E470b Magnesium salts of fatty acids's applications exploit its softness, insolubility in many solvents, and low toxicity.
E470b Magnesium salts of fatty acids are used as a release agent and as a component or lubricant in the production of pharmaceuticals and cosmetics.
E470b Magnesium salts of fatty acids are a food additive belonging to the group of “salts of fatty acids”.

E470b Magnesium salts of fatty acids are primarily composed of magnesium salts formed from long-chain saturated fatty acids such as stearic acid, palmitic acid, and sometimes oleic acid.
In practice, the most common representative compound of this group is magnesium stearate, which E470b Magnesium salts of fatty acids are widely used in food, pharmaceutical, and industrial applications.

Because E470b Magnesium salts of fatty acids are not a single pure chemical but a mixture of salts derived from fatty acids, its exact composition may vary depending on the source and manufacturing process.
E470b Magnesium salts of fatty acids are produced by reacting edible fatty acids (usually from vegetable oils or animal fats) with magnesium compounds such as magnesium oxide or magnesium hydroxide.
The result is a fine, white, hydrophobic powder that is insoluble in water but dispersible in fats and oils.

USES and APPLICATIONS of E470b MAGNESIUM SALTS OF FATTY ACIDS:
Lubricant: E470b Magnesium salts of fatty acids are frequently used in food processing due to their excellent lubricating properties, especially for preventing sticking and enhancing production efficiency.
Anti-sticking agent: In the production of sweets such as confectionery and chocolate, E470b Magnesium salts of fatty acids serve as an anti-sticking agent to effectively prevent adhesion between food and moulds or packaging, maintaining the appearance and integrity of the product.

Stabiliser: E470b Magnesium salts of fatty acids can act as a stabiliser to improve food texture and flavour.
In products like dairy items, bread, and biscuits, E470b Magnesium salts of fatty acids help extend shelf life and retain quality.
Release agent: In baked goods such as cakes and biscuits, E470b Magnesium salts of fatty acids work as a release agent, making it easier to remove products from moulds while preserving their shape and finish.

Anti-caking agent: E470b Magnesium salts of fatty acids may also be used as an anti-caking agent to prevent clumping during processing and storage, ensuring a consistent texture and mouthfeel.
Thickener: In certain foods, especially those with higher fat content such as chocolate, sauces, and concentrated soups, E470b Magnesium salts of fatty acids function as a thickener, enhancing viscosity and improving overall food texture.

E470b Magnesium salts of fatty acids are used to delay breakdown and absorption of medications, so they’re absorbed in the correct area of the bowel.
Plastics: In plastic products, E470b Magnesium salts of fatty acids are a heat stabilizer for polyvinyl chloride, and also a mold release agent and external smoothing agent.
E470b Magnesium salts of fatty acids are mainly used as an anti-caking agent, which is the main function it plays in food supplements; in addition to being an emulsifier, mainly in sweets, gum, herbs and spices and pastry ingredients.

Unlike the subtype E470a (sodium, potassium, and calcium salts of fatty acids), additive E470b Magnesium salts of fatty acids, exhibits a weaker anti-caking effect but has stronger lubricating properties.
Because of this, E470b Magnesium salts of fatty acids are widely used in the manufacture of chewing gums, breath freshening candies, and also in the pharmaceutical industry for producing tablets and capsules.

E470b Magnesium salts of fatty acids are a multifunctional ingredient that has wide uses in food supplements, powdered cosmetics, pharmaceutical tablets & capsules, and plastic products.
Food: E470b Magnesium salts of fatty acids' food grade can be used as a flow agent & anti-caking agent, lubricant, magnesium supplement in dietary food supplements.
E470b Magnesium salts of fatty acids are often used in the production of vitamin or multivitamin tablets or capsules by serving as a flow agent that binds with other ingredients from sticking and clumping to machine surfaces during production.

The following food may contain E470b Magnesium salts of fatty acids: Vitamins, Confectionery, Chewing gum, Candies, Mints, Baby formulas, Herbs and spices, Baking ingredients, Medical tablets and capsules.
The major uses of E470b Magnesium salts of fatty acids are as a lubricant, anti-adhesion agent, and glidant in the manufacturing of pharmaceuticals tablets and capsules.
E470b Magnesium salts of fatty acids are the most widely used lubricants.

E470b Magnesium salts of fatty acids have the advantages of strong lubricity, good anti-sticking, light weight, large specific surface area, uniform distribution after mixing with other ingredients, and good adhesion.
Lubricating principle: E470b Magnesium salts of fatty acids will be attached to the surface of the material to form a lubricating film, which blocks the contact and force between ingredients.
Spice & Powder Blends: E470b Magnesium salts of fatty acids limit clumping caused by moisture, improve flow.

Confectionery, Cocoa & Beverage Powders: Dosage repeatability and free flow.
Baked Goods & Premixes: E470b Magnesium salts of fatty acids is used to improve sprinkling and mixing behavior.
Demolding/Sliding: E470b Magnesium salts of fatty acids reduce surface adhesion when used with oil-based systems.

E470b Magnesium salts of fatty acids are primarily used in food applications as an anti-caking agent, flow regulator, and in some processes as a separator/lubricant.
E470b Magnesium salts of fatty acids increase the free flow of dry mixes, improve dosage repeatability, and reduce adhesion to equipment surfaces.
E470b Magnesium salts of fatty acids are the most widely used additive in pharmaceuticals.

E470b Magnesium salts of fatty acids are also used in food preparations as an anti-adherent and anticaking agent.
in the manufacture of medical tablets, capsules and powders.
In this regard, E470b Magnesium salts of fatty acids are also useful because it has lubricating properties, preventing ingredients from sticking to manufacturing equipment during the compression of chemical powders into solid tablets; E470b Magnesium salts of fatty acids are the most commonly used lubricant for tablets.

However, E470b Magnesium salts of fatty acids might cause lower wettability and slower disintegration of the tablets and slower and even lower dissolution of the drug.
E470b Magnesium salts of fatty acids can also be used efficiently in dry coating processes.
In the production of pressed candies, E470b Magnesium salts of fatty acids serves as a release agent.

E470b Magnesium salts of fatty acids are also used to bind sugar in hard candies such as mints.
E470b Magnesium salts of fatty acids are widely used as a lubricant in the pharmaceutical tablets and capsules due to the properties of strong lubrication, light-weight, and good adhesion.
E470b Magnesium salts of fatty acids can also be used in the production of cosmetics, paints, and plastics.

E470b Magnesium salts of fatty acids are widely used in the food, pharmaceutical, cosmetic, and industrial sectors because of their excellent lubricating and anti-caking properties.
In the food industry, E470b Magnesium salts of fatty acids are primarily used as anti-caking agents to prevent powdered ingredients such as salt, spices, sugar blends, and baking powders from clumping together, thereby improving flowability and maintaining product consistency.

In pharmaceutical manufacturing, E470b Magnesium salts of fatty acids play a critical role as tablet lubricants, where they prevent active ingredients from sticking to machinery during compression and help ensure smooth tablet formation, uniform weight, and efficient capsule filling.
In cosmetics, E470b Magnesium salts of fatty acids are used in powder-based products such as face powders and makeup formulations to improve texture, reduce stickiness, and enhance spreadability on the skin.

In industrial applications, E470b Magnesium salts of fatty acids are used as release agents and lubricants in plastics, rubber processing, and polymer manufacturing, where they reduce friction between surfaces and improve processing efficiency.
Overall, E470b Magnesium salts of fatty acids' function is mainly technological rather than nutritional, focusing on improving handling, stability, and performance of powdered and semi-solid systems.

E470b Magnesium salts of fatty acids are used in the quantities on the recipes in dairy products, desserts based on emulsified fats, milk or fruits, vegetable and fruit products, canned vegetables in vinegar, confectioneries and pastries, ice cream, pasta, rice, desserts based on cereals and/or starch, fish products, meat, eggs, sauces, spices, soups, salads, dietetic products, alcoholic and non-alcoholic beverages etc.
E470b Magnesium salts of fatty acids are widely used as a lubricant, anti-caking agent, and flow agent in both food and pharmaceutical industries.

-In the food industry uses of E470b Magnesium salts of fatty acids:
E470b Magnesium salts of fatty acids are used to prevent clumping of foods in powder or granular form.
In this way, the fluidity of E470b Magnesium salts of fatty acids is increased, and a homogeneous distribution is achieved.
E470b Magnesium salts of fatty acids are used as a coating agent in candies and some chocolates.

E470b Magnesium salts of fatty acids cover the surface of the products, preventing them from sticking together and providing a smooth appearance.
E470b Magnesium salts of fatty acids are used as a lubricant in food supplements.
E470b Magnesium salts of fatty acids are used in the production of tablets and capsules to ensure that they come out of the mold easily.
E470b Magnesium salts of fatty acids also enable machines to operate more efficiently and reduce wear during production.

-Pharmaceutical Industry uses of E470b Magnesium salts of fatty acids:
E470b Magnesium salts of fatty acids are used as a lubricant in pharmaceutical manufacturing processes, especially in the production of tablets and capsules.
This keeps production equipment running efficiently and helps products come out of molds easily.
E470b Magnesium salts of fatty acids are used as a binder in tablet production, thus ensuring that the tablets have a tight and smooth structure and preventing them from disintegrating or disintegrating.

E470b Magnesium salts of fatty acids ensure homogeneous distribution of the active ingredients in the tablet and facilitates the dispersion of the tablets in the mouth.
As a filling agent in capsule production, E470b Magnesium salts of fatty acids ensure homogeneous distribution of active ingredients and proper capsule filling.
E470b Magnesium salts of fatty acids prevent the clumping of drugs in powder and granule form, which increases the fluidity of the products and provides a homogeneous distribution.

-Cosmetics Industry uses of E470b Magnesium salts of fatty acids:
E470b Magnesium salts of fatty acids are used as a lubricant in make-up and skin care products, giving the skin a smooth feeling during application.
E470b Magnesium salts of fatty acids allow the products to spread more easily and evenly on the skin.
E470b Magnesium salts of fatty acids are used as a binder and filler in powders and powder products, ensuring that the particles are held together.

This increases the durability and performance of the products.
E470b Magnesium salts of fatty acids stabilize the mixture of oil and water phases in creams and lotions.
E470b Magnesium salts of fatty acids maintain the consistency of the products and ensure homogeneous distribution of the ingredients.
E470b Magnesium salts of fatty acids prevent clumping in cosmetic products in powder form and increase the fluidity of the products.
In bath salts and bombs, E470b Magnesium salts of fatty acids prevents clumping, allowing the products to be distributed evenly in the water.

-Plastic and Rubber Industry uses of E470b Magnesium salts of fatty acids:
E470b Magnesium salts of fatty acids are used to increase the tensile strength and flexibility of plastics.
This increases the durability and longevity of plastic products.
E470b Magnesium salts of fatty acids make plastics easier to process and reduce machine wear during the production process.

E470b Magnesium salts of fatty acids ensure smooth shaping of rubber mixtures in molds.
This ensures that the products remain in the desired shape and size.
E470b Magnesium salts of fatty acids ensure that the surface of the rubber products is smooth and prevent sticking.

-Paint and Varnish Industry uses of E470b Magnesium salts of fatty acids:
E470b Magnesium salts of fatty acids ensure homogeneous distribution of pigments in paint mixtures.
This ensures consistency of paint color and tone.
E470b Magnesium salts of fatty acids improve the paint drying time and ensure that the painted surfaces are smooth.

E470b Magnesium salts of fatty acids increase the fluidity of the products during application and allow them to spread more easily.
In varnishes, E470b Magnesium salts of fatty acids ensures homogeneity of the surface coating and increase the protective properties of the product.
E470b Magnesium salts of fatty acids ensure that varnished surfaces are smooth and offers an aesthetic appearance.

-Cosmetics
In the production of powdered cosmetics (e.g. talcum powder makeup), E470b Magnesium salts of fatty acids are often added to improve the adhesion of powders, and make them smooth on the skin surface, and easily adhere to the skin.
In addition, E470b Magnesium salts of fatty acids are often used as a thickener and emollient in cosmetics and personal care products.
Commonly used adhesives are zinc stearate, E470b Magnesium salts of fatty acids, and aluminum stearate.
These metal salts of stearic acid are wrapped outside other powder particles after added, making the powdered cosmetics not permeable to water.
Magnesium and zinc stearate are commonly used in this field as aluminum stearate is a little rough, while calcium stearate lacks smoothness.

PURPOSES of E470b MAGNESIUM SALTS OF FATTY ACIDS:
Lubricants play an important role in the production of tablets.
Commonly with the following three functions:

Anti-sticking:
E470b Magnesium salts of fatty acids prevent the adhesion of other ingredients to punches and molds under pressure.
Free-flowing:
E470b Magnesium salts of fatty acids reduce the friction between particles and increase their fluidity.
Lubricity:
E470b Magnesium salts of fatty acids reduce the friction between particles and the hole of the mold.

PROPERTIES of E470b MAGNESIUM SALTS OF FATTY ACIDS:
E470b Magnesium salts of fatty acids have both characteristics of metal salt and stearic acid.
The lubricity and hydrophobicity are derived from stearic acid.
E470b Magnesium salts of fatty acids are stable, but will decompose into stearic acid and magnesium salt in the case of a strong acid.
A large specific surface area, with strong adsorption and hygroscopicity, a slippery feeling in contact with the skin and is easy to stick to the skin.

Appearance
E470b Magnesium salts of fatty acids are an off-white to white powder, greasy to the touch.

Solubility
E470b Magnesium salts of fatty acids are an anionic surfactant, unlike the other two metallic stearates (sodium and potassium stearate) but similar with calcium stearate, it is practically insoluble in water with the solubility 0.004 g/100 mL (25 °C).
Partially soluble in ethanol and ether.

Why is it insoluble in water?
The divalent Mg2+ can bind two nonpolar fatty acid molecules while Na+ and K+ as monovalent ions can only combine with one fatty acid.
Two fatty acid molecules protect Mg2+ from interacting with the water molecules and thus make E470b Magnesium salts of fatty acids insoluble in water.
Group of semisynthetic additives with emulsifying and stabilizing role.
Fatty acids are mixtures of stearic, oleic, palmitic and myristic acids, which form salts with magnesium and can be obtained from animal or plant fats.

WHAT ARE E470B MAGNESIUM SALTS OF FATTY ACIDS MADE OF?
From the USP definition, E470b Magnesium salts of fatty acids are a mixture of Magnesium stearate and magnesium palmitate as the main components.

HOW ARE E470B MAGNESIUM SALTS OF FATTY ACIDS MADE?
Since stearic acid is a weak organic acid, it cannot directly react with magnesium sulfate to produce E470b Magnesium salts of fatty acids.
In the commercial manufacturing process of E470b Magnesium salts of fatty acids, stearic acid should first be saponified with sodium hydroxide solution to obtain sodium stearate, and then react with the solution of magnesium sulfate or magnesium chloride to synthesize E470b Magnesium salts of fatty acids.

The following are the brief three above mentioned processes:
C17H35COOH + NaOH → C17H35COONa + H2O
2C17H35COONa + MgSO4 → (C17H35COO)2 Mg + Na2SO4
2C17H35COONa + MgCl2 → (C17H35COO)2 Mg + 2NaCl

PROCESS COMPATIBILITY & STABILITY of E470b MAGNESIUM SALTS OF FATTY ACIDS:
Heat:
E470b Magnesium salts of fatty acids are stable at typical process temperatures; risk of fatty acid decomposition may be observed at prolonged high temperatures.
pH:
Neutral/inert in alkaline environments; saponification/decomposition may occur in strong acids.
Interaction:
Compatible with emulsifiers and oil phase; homogeneously distributed by mechanical mixing.

SPECIATION of E470b MAGNESIUM SALTS OF FATTY ACIDS:
Anhydrous E470b Magnesium salts of fatty acids are known, with the formula (C17H35CO2)2Mg.
More important are the hydrates, which have the formula (C17H35CO2)2Mg(H2O)n where n = 1, 2, 3.
The latter has been characterized by X-ray crystallography.

MANUFACTURING of E470b MAGNESIUM SALTS OF FATTY ACIDS:
E470b Magnesium salts of fatty acids are produced by the reaction of sodium stearate with magnesium salts or by treating magnesium oxide with stearic acid.

DISADVANTAGE of E470b MAGNESIUM SALTS OF FATTY ACIDS:
E470b Magnesium salts of fatty acids are widely used as a lubricant for tablets and capsules, with a common amount ranging from 0.25 to 0.50%.
Due to its hydrophobic property, E470b Magnesium salts of fatty acids may lower wettability, delay disintegration of the tablets, and slow down the dissolution rate of the drug from the solid dosage.
So it may decrease the absorption rates of tablets and capsules in our body.

For your better understanding, here are two simple dissolution time tests of capsule formulations with or without E470b Magnesium salts of fatty acids.
That’s why E470b Magnesium salts of fatty acids' concentration is generally relatively small in the formulations.
However, the usage of E470b Magnesium salts of fatty acids can be more if formulated in sustained-release dosage forms.

During tablet compression, a large amount of E470b Magnesium salts of fatty acids employed can affect the elastic deformation of the tablet.
Therefore, the amount of lubricant should be appropriate to make the tablet have good fluidity and compressibility.
The general usage of E470b Magnesium salts of fatty acids should not exceed 0.5% in the direct compression, otherwise, the tablet will be softened.

When E470b Magnesium salts of fatty acids are premixed with other ingredients before tableting, the longer the mixing time, the more the reduced dissolution rate and tensile strength of the tablet.
Therefore, the mixing time should be carefully controlled.

OCCURRENCE of E470b MAGNESIUM SALTS OF FATTY ACIDS:
When produced by soap and hard water, E470b Magnesium salts of fatty acids and calcium stearate both form a white solid insoluble in water, and are collectively known as soap scum.
This scum is a major component of the common “ring” of scum around a drained bathtub.

E470b Magnesium salts of fatty acids, the magnesium salt of stearic acid with the chemical formula Mg(C17H34COO)2.
Generally, this salt of fatty acid can be used as an anti-caking agent, lubricant, binder, emulsifier, and mineral (magnesium) supplement in food with the European food additives number E470b Magnesium salts of fatty acids.

PHYSICAL and CHEMICAL PROPERTIES of E470b MAGNESIUM SALTS OF FATTY ACIDS:
CAS Number (most common representative): 557-04-0
EC Number: 209-150-3
Molecular Formula (magnesium stearate): C₃₆H₇₀MgO₄
Molecular Weight: ~591.24 g/mol
Appearance: White to off-white fine powder or flaky solid
Odor: Slight fatty odor or odorless
Taste: Neutral, bland
Physical State: Solid (powder)
Color: White to pale white
Density (bulk): Low bulk density (~0.2–0.4 g/cm³ depending on grade)

Melting Range: 110–160 °C (decomposes depending on fatty acid composition)
Solubility in Water: Insoluble
Solubility in Ethanol: Insoluble
Solubility in Oils/Fats: Dispersible in hot oils and organic lipid phases
Volatility: Non-volatile
Particle Nature: Fine hydrophobic particulate
Flow Properties: Excellent flow enhancer in powders
Hygroscopicity: Non-hygroscopic (does not absorb moisture significantly)

Chemical Nature: Metallic soap (magnesium salt of long-chain fatty acids)
Functional Groups: Carboxylate (–COO⁻) + Mg²⁺ ionic bonding
Reactivity: Chemically stable under normal conditions
pH (suspension): Slightly alkaline (depends on dispersion medium)
Stability: Stable to heat under moderate processing conditions
Incompatibilities: Strong acids (decomposes to free fatty acids), strong oxidizing agents
Hydrophobicity: Strongly hydrophobic
Decomposition Products: Fatty acids, magnesium oxide (at high temperature)
Surface Activity: Acts as lubricant and anti-adherent due to amphiphilic structure

Chemical Behavior: Forms insoluble salts in aqueous systems
Chemical formula: Mg(C18H35O2)2
Molar mass: 591.27 g/mol
Appearance: light white powder
Odor: slight
Density: 1.026 g/cm3
Melting point: 88.5 °C (191.3 °F; 361.6 K)
Solubility in water: 0.003 g/100 mL (15 °C)
Solubility in water: 0.004 g/100 mL (25 °C)

Solubility in water: 0.008 g/100 mL (50 °C)
Solubility: negligible in ether and alcohol
Solubility: slightly soluble in benzene
CAS number: 557-04-0
Chemical formula: Mg(C18H35O2)2
Molecular weight: 591.27
Melting point: 88.5 °C (191.3 °F; 361.6 K)

Product Name: Magnesium Stearate – E470b
Function: Anti-caking, flow regulator, separator/slider, conveyor
Chemical Name: Magnesium stearate (octadecanoate); magnesium salts of fatty acids.
E Code: E470b (magnesium salts of fatty acids)
CAS No: 557-04-0
Appearance: White, very fine, slightly waxy/hydrophobic powder.
Resolution: It is practically insoluble in water; it can disperse in the oil phase/dispersions.
Recommended Initial Dosage: Anti-caking/flow: 0.2–1.0% • Separator/slider: 0.1–0.8% (optimize according to formula and regulations)

FIRST AID MEASURES of E470b MAGNESIUM SALTS OF FATTY ACIDS:
-Description of first-aid measures
*General advice:
Show this material safety data sheet to the doctor in attendance.
*If inhaled:
After inhalation:
Fresh air.
*In case of skin contact:
Take off immediately all contaminated clothing.
Rinse skin with
water/ shower.
*In case of eye contact:
After eye contact:
Rinse out with plenty of water.
Call in ophthalmologist.
Remove contact lenses.
*If swallowed:
After swallowing:
Immediately make victim drink water (two glasses at most).
Consult a physician.
-Indication of any immediate medical attention and special treatment needed.
No data available

ACCIDENTAL RELEASE MEASURES of E470b MAGNESIUM SALTS OF FATTY ACIDS:
-Environmental precautions:
Do not let product enter drains.
-Methods and materials for containment and cleaning up:
Cover drains.
Collect, bind, and pump off spills.
Observe possible material restrictions.
Take up dry.
Dispose of properly.
Clean up affected area.

FIRE FIGHTING MEASURES of E470b MAGNESIUM SALTS OF FATTY ACIDS:
-Extinguishing media:
*Suitable extinguishing media:
Carbon dioxide (CO2)
Foam
Dry powder
*Unsuitable extinguishing media:
For this substance/mixture no limitations of extinguishing agents are given.
-Further information:
Prevent fire extinguishing water from contaminating surface water or the ground water system.

EXPOSURE CONTROLS/PERSONAL PROTECTION of E470b MAGNESIUM SALTS OF FATTY ACIDS:
-Extinguishing media:
*Suitable extinguishing media:
Carbon dioxide (CO2)
Foam
Dry powder
*Unsuitable extinguishing media:
For this substance/mixture no limitations of extinguishing agents are given.
-Further information:
Prevent fire extinguishing water from contaminating surface water or the ground water system.

HANDLING and STORAGE of E470b MAGNESIUM SALTS OF FATTY ACIDS:
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed.
Dry.

STABILITY and REACTIVITY of E470b MAGNESIUM SALTS OF FATTY ACIDS:
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature).
-Possibility of hazardous reactions:
No data available