ALUMINIUM STEARATE

Aluminum Distearate
CAS #: 300-92-5
Linear Formula: [CH3(CH2)16COO]2Al(OH)
MDL Number: N/A EC No.: 206-101-8
PRODUCT    Product Code    ORDER    SAFETY DATA    TECHNICAL DATA
(2N) 99% Aluminium Distearate
AL-STAT2-02
(3N) 99.9% Aluminium Distearate
AL-STAT2-03

(4N) 99.99% Aluminium Distearate
AL-STAT2-04

(5N) 99.999% Aluminium Distearate

The Stearate salts, including Lithium Stearate, Aluminum Distearate, Aluminum Stearate, Aluminum Tristearate, Ammonium Stearate, Calcium Stearate, Magnesium Stearate, Potassium Stearate, Sodium Stearate, and Zinc Stearate are fine, white powders with a slight fatty odor. In cosmetics and personal care products, Stearate salts are used mainly in the formulation of makeup products such as eyeliner, eyeshadow, mascara, lipsticks, blushers, face powders and foundations. They are also used in fragrances, deodorants, and hair and skin care products.

Why is it used in cosmetics and personal care products?
The Stearate salts are generally used for their lubricating properties. They also help to keep emulsions from separating into their oil and liquid components. The Stearate salts increase the thickness of the lipid (oil) portion of cosmetics and personal care products and reduce the clear or transparent appearance of finished products.

SYNONYMS
C36-H71-Al-O5, "aluminium hydroxybis(octadecanato-O)-", "aluminum distearate", "aluminium, hydroxybis(stearato)-", "aluminium hydroxide
stearate", "aluminium hydroxy stearate", hydroxystearate, "aluminium hydroxybis(stearato)", "hydroxybis(octodecanoato-O) aluminium",
"hydroxyaluminium distearate", "Special M"

Aluminium monostearate is an organic compound which is a salt of stearic acid and aluminium. It has the molecular formula Al(OH)2C18H35O2. It is also referred to as
 dihydroxy(octadecanoato-O-)aluminium or dihydroxy(stearato)aluminium.

It is used to form gels in the packaging of pharmaceuticals, and in the preparation of colors for cosmetics. It is usually safe in commercial products, but aluminium may accumulate
in the body

Aluminum stearate is a white, wax-like powder (metallic soap) that dissolves in mineral spirits or hot oil. A small amount (2% or less) added to oil paint imparts a short, buttery consistency. It eliminates the separation of pigment and oil, thickens varnishes considerably. A concentrate of aluminum stearate and linseed oil can be prepared ahead of time and added to the paint whenever needed.

Aluminum stearate is made via the precipitation process using high quality stearic acid and exhibits the following properties: Good gelling and thickening action, excellent water repellency, transparency and a synergistic effect with zinc stearate or calcium stearate.

The effects of metal soaps on pigments have been extensively studied. Aluminum stearate was found to coat the surface of pigment particles and helped prevent settling as well as reducing the amount of oil needed to wet the pigment. The amount of aluminum stearate needed to coat pigments varied on a weight basis, but a solution of 2% by weight (weight of aluminum stearate/weight of oil) of aluminum stearate was more effective than 0.5% or 4% solutions in altering pigment surfaces (Gardner 1930). The soaps coat the surface of the pigments and by steric effects keep the particles from aggregating (Pilpel 1963), which helps to keep the particles in suspension.

With increasing amounts of aluminum stearate the oil pigment mixture becomes viscous, and by using an appropriate amount of aluminum stearate the paint can gel at a lower pigment concentration (Mayer 1965). This can be used to create a "cheaper" paint since a smaller amount of a costly pigment needs to be used. A significant advantage of using stearates is that the oil and pigment do not separate greatly over long periods of time in the paint tube. Manufacturers of artists' paints often use aluminum stearate in their formulations without listing it as a component on the product label.

Solubility
Aluminum stearate exhibits relatively high solubility in hydrocarbon solvents (such as mineral spirits) when compared to other metallic stearates. It is insoluble in water, alcohol and ether; but is readily soluble in benzene, acids and common solvents when hot.

Storage
Aluminum stearate has long storage life if stored in cool and dry location.

How to Use
Aluminum stearate dissolves in vegetable oils on heating and if a high enough concentration of the soap is used, gelling occurs on cooling. In the usual practice of making paints, the aluminum stearate is ground with the pigment before the bulk of the oil is added. To prepare a concentrated solution (10% w/v), add 100 grams of aluminum stearate (nearly fills a half liter measuring cup without compacting) to one liter of linseed oil. Heat the oil to about 150° C. and gradually slowly adding the white powder to the hot oil with stirring. Add one part of this solution to four parts of oil by weight of oil before adding to pigments and grinding.

Aluminium stearate
Aluminum stearate
aluminium tristearate
Aluminum octadecanoate637-12-7
Aluminum(III) stearate
Octadecanoic acid, aluminum salt
Metasap XX
Tribasic aluminum stearate
ALUMINUM TRISTEARATE
Rofob 3
Alugel 34TN
Monoaluminum stearate
Aluminum (III) stearate
UNII-U6XF9NP8HM
Aluminum stearate (1:3)
Aluminum stearate, tribasic
Stearic acid, aluminum salt
EINECS 211-279-5
Aluminium tristearate, pure
Dihydroxy(octanoato-O)aluminum
AI3-01515
Aluminum, dihydroxy(octadecanoato-O)-
Octadecanoic acid, aluminum salt (3:1)
aluminum trioctadecanoate
Tristearic acid aluminum
aluminium trioctadecanoate
Aluminium Stearate

Similar products for application:
aluminum monostearate
aluminum tristearate
ammonium stearate
calcium stearate
magnesium stearate
octadecanoic acid
sodium stearate
stearic acid
zinc stearate

IUPAC name
Dihydroxy(stearoyloxy)aluminium
Other names
Aluminum monostearate; Dibasic aluminum stearate; Dihydroxyaluminum stearate; Dihydroxy(octadecanoato-O-)aluminium; Dihydroxy(stearato)aluminium
Identifiers
CAS Number    
7047-84-9 

Aluminum octadecanoate; Aluminium trioctadecanoate; Octadecanoic acid, aluminum salt; Aluminum(III) stearate; aluminium tristearate; aluminum tristearate; Tribasic aluminum stearate; 
stearic acid, aluminum salt; Monoaluminum stearate

Customers For Aluminum Stearate Have Also Viewed:
Aluminum Monostearate
Aluminum Distearate

There are multiple types of aluminum stearates, generally classified as aluminum mono-, di-, and tri-stearate. They vary in terms of physical properties such as melting point, free 
fatty acids, and particularly the gelling properties.

Oils with a low viscosity are best thickened by aluminum di- and tri-stearate, whilst very viscous oils from stiffer gel when combined with aluminum mono- or di-stearates.

All aluminum stearates are highly hydrophobic, and feature outstanding transparency and excellent adhesion to metal surfaces. Due to their water repellency, aluminum di- and tri-stearate 
are used as hydrophobic agents in the building industry.

Aluminum stearate (aluminum distearate) is a white, wax-like powder (metallic soap) that dissolves in mineral spirits or hot oil. A small amount (2% or less) added to oil paint imparts a short, buttery consistency. It eliminates the separation of pigment and oil, thickens varnishes considerably. A concentrate of aluminum stearate and linseed oil can be prepared ahead of time and added to the paint whenever needed.

Aluminum stearate is made via the precipitation process using high quality stearic acid and exhibits the following properties: Good gelling and thickening action, excellent water repellency, transparency and a synergistic effect with zinc stearate or calcium stearate.

The effects of metal soaps on pigments have been extensively studied. Aluminum stearate was found to coat the surface of pigment particles and helped prevent settling as well as reducing the amount of oil needed to wet the pigment. The amount of aluminum stearate needed to coat pigments varied on a weight basis, but a solution of 2% by weight (weight of aluminum stearate/weight of oil) of aluminum stearate was more effective than 0.5% or 4% solutions in altering pigment surfaces (Gardner 1930). The soaps coat the surface of the pigments and by steric effects keep the particles from aggregating (Pilpel 1963), which helps to keep the particles in suspension.

With increasing amounts of aluminum stearate the oil pigment mixture becomes viscous, and by using an appropriate amount of aluminum stearate the paint can gel at a lower pigment concentration (Mayer 1965). This can be used to create a "cheaper" paint since a smaller amount of a costly pigment needs to be used. A significant advantage of using stearates is that the oil and pigment do not separate greatly over long periods of time in the paint tube. Manufacturers of artists' paints often use aluminum stearate in their formulations without listing it as a component on the product label.

Solubility
Aluminum stearate exhibits relatively high solubility in hydrocarbon solvents (such as mineral spirits) when compared to other metallic stearates. It is insoluble in water, alcohol and ether; but is readily soluble in benzene, acids and common solvents when hot.

Storage
Aluminum stearate has long storage life if stored in cool and dry location.

How to Use
Aluminum stearate dissolves in vegetable oils on heating and if a high enough concentration of the soap is used, gelling occurs on cooling. In the usual practice of making paints, 
the aluminum stearate is ground with the pigment before the bulk of the oil is added. To prepare a concentrated solution (10% w/v), add 100 grams of aluminum stearate (nearly fills
 a half liter measuring cup without compacting) to one liter of linseed oil. Heat the oil to about 150° C. and gradually slowly adding the white powder to the hot oil with stirring. 
Add one part of this solution to four parts of oil by weight of oil before adding to pigments and grinding.

Aluminum Stearate (C54H105AlO6) exists as white powder and is an aluminum salt of stearic acid. In the pharmaceutical industry, it is used as an anticaking agent; colorant; emulsion 
stabilizer; and viscosity increasing agent. According to the FDA, aluminum stearate is considered safe for general or specific, limited use in food. Aluminum stearate is not 
classifiable as a human carcinogen (cancer-causing agent). A hard, thermoplastic white powder prepared from Tallow and Alum. Aluminum stearate forms gels with turpentine, Mineral spirits, and oils. It has been used as a Drier, thickener, Emulsifier, and matting agent in paints and varnishes although excess amounts produce soft, noncohesive films. Aluminum stearate is also used to waterproof fabrics, ropes, Paper, Leather, Concrete, and Stucco. It is used as an ingredient in photographic emulsions.

Synonyms and Related Terms
aluminum tristearate; octadecanoic acid aluminum salt; stearic acid aluminum salt; aluminum stearate white (AAT); stéarate d'aluminium (Fr.); Daiwax WA1; Metaspa XX; Rofob 3

Other Properties
Soluble in ethanol, benzene, turpentine and mineral oils.

Insoluble in water.

1. n. [Drilling Fluids]
The salt of aluminum hydroxide and stearic acid (saturated C-18 fatty acid) with the formula Al(O2C18H35)3. It is a grease-like solid. When mixed with oil (for example, diesel oil) and the mixture sprayed onto the surface of a foamy water mud, it helps the gas bubbles break out of the mud.

1. n. [Drilling Fluids]
The salt of aluminum hydroxide and stearic acid (saturated C-18 fatty acid) with the formula Al(O2C18H35)3. It is a grease-like solid. When mixed with oil (for example, diesel oil) and the mixture sprayed onto the surface of a foamy water mud, it helps the gas bubbles break out of the mud.

Octadecanoic acid, aluminum salt (3:1)
Other
IUPAC names
aluminium(3+) ion tris(octadecanoate)
C&L Inventory
aluminium(3+) trioctadecanoate
Other
aluminum trioctadecanoate
Registration dossier
aluminum;octadecanoate