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Bentonite is comprised primarily of the smectite group (montmorillonite) of clay minerals.
Bentonite is widely used in various industrial applications such as clarification of edible and mineral oils, paints, cosmetics, and pharmaceuticals.
Bentonite is also used as an adsorbent for the elimination of pollutants from wastewater.
CAS Number: 1302-78-9
Molecular Formula: Al2O3.4(SiO2).H2O
Molecular Weight: 360.31
EINECS Number: 215-108-5
Synonyms: Wilkonite, Alum bentonite, Bentonite magma, Colloidal clay, A3N5ZCN45C, aluminum silicate hydrate, aluminium silicate hydrate, INS NO.558, INS-558, CI 77004, E-558, Bentonite, Bentonite (montmorillonite clay), Bentonitum, DTXSID6030782, GZE Indian Healing Clay, RefChem:159664, CHEBI:133354, 215-108-5, Accofloc 352, Accugel F, AEG 325, Akajo, Albagel Premium USP 4444, Altonit SF, Aquagel, Aquagel Gold Seal, Asama, Askangel, Benclay, Bengel, Bengel 11, Bengel 15, Bengel 23, Bengel A, Bengel FW, Bengel HVP, BentoGrout, Bentolite HS, Bentolite L, Bentone 660, Bentonit T, Bentonite 2073, Bentosolon 82, Black Hills BH 200, Bulgarben BA, Clarit BW 100, Clarit BW 125, Cosintam 403, Culvin, CVIS, Detercal G 1FC, Detercal G 2FC, Detercol P 2, EX 0030 (clay), EX 0276, Filgel, Fulbent 570, G 100 (clay), GK 129SA3, GK 129SA5, Imvite I.G.B.A, Magbond, Otaylite, Panther creek bentonite, Soap clay, Southern bentonite, Tixoton, Volcaly bentonite BC, Volclay, Wilkinite, Montmorillonite, 1318-93-0, Gelwhite L, Montmorillonite K 10, Bentolite, Gelwhite H, Gelwhite GP, Montmorillonite KSF, Montmorillonite K-10, Diosmectite, dialuminum;dioxosilane;oxygen(2-);hydrate, Montmorillonite K10, A585MN1H2L, Montmorillonite ((Al1.33-1.67Mg0.33-0.67)(Ca0-1Na0-1)0.33Si4(OH)2O10·xH2O), Envirobent, Neokunibond, Arcillite, Bedelix, Deriton, Metaloid, Brock, Smecta, Montmorillonite clay, Lavioplast C, Kunipia G, Flygtol GA, Imvite E, Imvite K, Kunipia TO, Optigel CL, Dis-Thix Extra, Osmos N, Alabama Blue Clay, Bentolite L 3, AMS (mineral), Galleonite 136, Hydrocol 2D1, Furonaito 101, Furonaito 113, Kunipia G 4, Mineral Colloid BP, Ben-A-Gel, DH 1 (catalyst), Ben-A-Gel EW, KM 1 (mineral), Benclay MK 101, Albagen 4439, K 10 (clay), UNII-A585MN1H2L, Montmorillonite (HAlSi2O6), Smecdral, DH 1, DH 2, Montmorillonite (AlH(SiO3)2), HSDB 8118, French green clay, BPW 009, EINECS 215-288-5, Dioctahedral smectite, BPW 009-3, BPW 009-10, BPW 015-10, BENTONITE [FCC], BENTONITE [JAN], BENTONITE [II], BENTONITE [MI], BENTONITE [HSDB], BENTONITE [VANDF], Sodium montmorillonite clay, Al2H2O12Si4, BENTONITE [MART.], BENTONITE [WHO-DD], BENTONITE [WHO-IP], MONTMORILLONITE [MI], DIOSMECTITE [WHO-DD], ALUM BENTONITE [VANDF], orb1308741, BENTONITE MAGMA [VANDF], BENTONITE [EP MONOGRAPH], MONTMORILLONITE [WHO-DD], Montmorillonite, K 10, powder, BENTONITUM [WHO-IP LATIN], AKOS026750098, DB13654, FD29516, s25268, 110070-78-5, Q26840848, Hydrated sodium calcium aluminium magnesium silicate hydroxide, MONTMORILLONITE;BENTONITE MAGMA;BENTONITE;BENTONITE (SODIUM FORM);FULLERS EARTH;KWK KRYSTAL KLEAR;albagelpremiumusp4444;pengruntu
Bentonite is a crystalline, claylike mineral, and is available as an odorless, pale buff, or cream to grayish-colored fine powder, which is free from grit.
Bentonite consists of particles about 50–150 mm in size along with numerous particles about 1–2μm.
Microscopic examination of samples stained with alcoholic methylene blue solution reveals strongly stained blue particles. Bentonite may have a slight earthy taste.
Bentonite is an absorbent, volcanic ash-derived aluminum silicate clay (primarily montmorillonite) valued for its high swelling and adsorptive properties, known as the "clay of a thousand uses".
Common applications include cat litter, industrial binders, oil refining, and skincare/detox products.
Found worldwide, with major deposits in Wyoming, China, and Greece, it is generally considered safe but may cause gastrointestinal distress if over-consumed.
The swelling property of bentonite is used to produce viscous water suspensions for bonding, plasticizing, and suspending applications.
The presence of a large surface area of bentonite is due to the colloidal dispersion of the particles is the main reason for its application as an insecticide carrier, an emulsifier, and an emulsion stabilizer.
Bentonite is an absorbent swelling clay consisting mostly of montmorillonite (a type of smectite) which can either be Na-montmorillonite or Ca-montmorillonite.
Bentonite has a considerably greater swelling capacity than Ca-montmorillonite.
Bentonite is a natural clay mineral primarily composed of montmorillonite, widely used in industrial, cosmetic, pharmaceutical, and environmental applications for its adsorption and swelling properties.
It is formed from the alteration of volcanic ash.
Bentonites composition may vary depending on the source.
Chemically, bentonite consists mainly of hydrated aluminum silicate minerals, especially montmorillonite.
Its layered structure allows water and ions to enter between layers.
This gives bentonite its characteristic swelling behavior.
Physically, bentonite appears as a fine, soft powder ranging in color from white to gray or beige.
It has high surface area and strong adsorption capacity.
When mixed with water, it forms a gel-like mass.
Bentonite exhibits high swelling capacity in water, especially sodium bentonite.
Bentonite can absorb several times its weight in water.
This leads to the formation of viscous suspensions.
The material has strong adsorptive and ion-exchange properties.
It can bind heavy metals, toxins, and organic compounds.
This makes it useful in purification and environmental applications.
Bentonite acts as a thickening and suspending agent in various formulations.
It helps stabilize dispersions and prevent sedimentation.
This is important in cosmetic and pharmaceutical products.
There are different types of bentonite, including sodium bentonite and calcium bentonite.
Sodium bentonite has higher swelling capacity.
Calcium bentonite is more commonly used for adsorption purposes.
In cosmetic formulations, bentonite functions as an absorbent, viscosity modifier, and skin-conditioning agent.
It is often used in masks, creams, and cleansing products.
Bentonite helps remove impurities and excess oil from the skin.
Bentonite is best described as a natural swelling clay with strong adsorption and thickening properties, widely used in industrial processes, environmental treatment, and personal-care products.
Density: 2~3g/cm3
storage temp.: Store at room temperature, keep dry and cool
solubility: Practically insoluble in water and in aqueous solutions. It swells with a little water forming a malleable mass.
form: powder
color: Light yellow or green, cream,pink, gray to black solid
Odor: odorless, sl. earthy taste
Water Solubility: Insoluble in water and forms a colloidal solution.
Merck: 14,1055
Exposure limits ACGIH: TWA 1 mg/m3
Dielectric constant: 8.1（Ambient）
Stability: Stable.
Cosmetics Ingredients Functions: EMULSION STABILISING
Bentonite is a natural material made of clay minerals formed by the alteration of volcanic ash and tuff.
The clay minerals have different amounts of calcium and sodium.
Bentonite may contain small amounts of other minerals such as quartz, feldspar, pyroxene, biotite, and calcite.
A type of clay that is used as an adsorbent in making paper.
The gelatinous suspension it forms with water is used to bind together the sand for making iron castings.
Chemically bentonite is an aluminosilicate of variable composition.
Bentonite has a layered silicate structure (2:1 type clay) consisting of two silica tetrahedral sheets and one alumina octahedral sheet.
Weak forces between these layers allow water and ions to enter.
This is responsible for its swelling and expansion behavior.
The material exhibits high cation exchange capacity (CEC).
Bentonite can exchange ions such as Na⁺, Ca²⁺, and Mg²⁺ with surrounding solutions.
This property is important in environmental and chemical applications.
Bentonite forms thixotropic gels when dispersed in water.
These gels become fluid under shear and return to a viscous state at rest.
This behavior is useful in drilling fluids and suspensions.
The clay shows strong adsorption of organic molecules and impurities.
It can bind dyes, proteins, and toxins.
This makes it effective in purification and clarification processes.
Bentonite is widely used for its rheological control properties.
It helps adjust viscosity and flow behavior in liquid systems.
This is important in paints, coatings, and cosmetics.
The material is generally chemically stable and inert under normal conditions.
It does not readily react with most substances.
This contributes to its wide industrial use.
Bentonite can form stable colloidal dispersions in water.
These dispersions remain suspended for long periods.
This property is useful in formulations requiring uniform distribution.
Because of its natural origin, bentonite is often used in eco-friendly and natural formulations.
It is biodegradable and widely available.
Bentonite is a highly versatile clay mineral with swelling, adsorption, ion-exchange, and rheological properties, making it valuable across industrial, environmental, and cosmetic applications.
Uses:
Bentonite is used to regulate the viscosity and suspension properties of a cosmetic formulation.
It also acts as an overall formula stabilizer.
Bentonite’s water-absorption capabilities allow it to form a gelatinous mass.
Considered a noncomedogenic raw material, bentonite is a colloidal aluminum silicate clay.
Bentonite is a general purpose additive that is used as a pigment and colorant and to clarify and stabilize wine.
Bentonite is a naturally occurring hydrated aluminum silicate used primarily in the formulation of suspensions, gels, and sols, for topical pharmaceutical applications.
Bentonite is also used to suspend powders in aqueous preparations and to prepare cream bases containing oil-in-water emulsifying agents.
Bentonite may also be used in oral pharmaceutical preparations, cosmetics, and food products.
In oral preparations, bentonite, and other similar silicate clays, can be used to adsorb cationic drugs and so retard their release. Adsorbents are also used to mask the taste of certain drugs.
Bentonite has been investigated as a diagnostic agent for magnetic resonance imaging.
Therapeutically, bentonite has been investigated as an adsorbent for lithium poisoning.
Bentonite is widely used in cosmetic and personal-care products as an absorbent and thickening agent.
It is commonly found in face masks and cleansers.
Bentonite helps remove excess oil, dirt, and impurities from the skin.
In drilling fluids (mud) for oil and gas industry, bentonite is used to control viscosity and stabilize boreholes.
It forms thixotropic gels that suspend cuttings.
This improves drilling efficiency and safety.
Bentonite is used in environmental applications, such as wastewater treatment and soil remediation.
It adsorbs heavy metals and pollutants.
This helps purify water and protect the environment.
In foundry applications, bentonite acts as a binder for molding sand.
It provides strength and cohesion to molds.
This is essential in metal casting processes.
Bentonite is used in pharmaceutical formulations as a suspending and stabilizing agent.
It helps maintain uniform dispersion of active ingredients.
This improves product consistency.
In food industry, bentonite is used as a clarifying agent in beverages such as wine and juice.
It removes proteins and impurities.
This improves clarity and stability.
Bentonite is applied in paint, coatings, and adhesives as a rheology modifier.
It controls viscosity and prevents sedimentation.
This ensures uniform application and stability.
In construction and civil engineering, bentonite is used in sealing and waterproofing applications.
It forms impermeable barriers when hydrated.
This is useful in foundations and landfills.
Bentonite is also used in animal feed and agriculture as a binder and anti-caking agent.
It helps improve pellet quality and stability.
Bentonite is used wherever adsorption, thickening, binding, sealing, and suspension properties are required across industries such as cosmetics, drilling, environmental protection, construction, and manufacturing.
Bentonite is used in cat litter products due to its high swelling and absorption capacity.
It forms clumps when wet, making waste easy to remove.
This improves hygiene and usability.
In pelletizing processes, especially in iron ore processing, bentonite acts as a binder.
It helps form stable pellets from fine particles.
This improves handling and processing efficiency.
Bentonite is used in paper manufacturing as a retention aid and filler.
It improves paper strength and printability.
This enhances product quality.
In detergents and cleaning products, bentonite functions as a softening and anti-redeposition agent.
It helps prevent dirt from reattaching to fabrics.
This improves cleaning performance.
Bentonite is applied in cosmetic powders and foundations as an absorbent and texture modifier.
It helps control oil and improve product feel.
This enhances cosmetic performance.
In sealants and grouts, bentonite is used to fill gaps and create waterproof barriers.
It expands upon hydration to seal cracks.
This is useful in construction and environmental protection.
Bentonite is used in geosynthetic clay liners (GCLs) for landfill and containment systems.
It acts as a barrier to prevent leakage of contaminants.
This supports environmental safety.
In ceramics and clay products, bentonite improves plasticity and workability.
It helps shape and form ceramic bodies.
This enhances manufacturing processes.
Bentonite is also used in oil purification and decolorization processes.
It adsorbs impurities and unwanted pigments.
Bentonite is used wherever high absorption, binding, swelling, sealing, and purification properties are required in industries ranging from consumer products to heavy industry and environmental engineering.
Safety Profile:
Bentonite is generally considered to have low toxicity, but exposure to dust and prolonged contact may present certain hazards.
Proper handling and industrial hygiene practices are recommended.
The main risks are related to particulate exposure.
Skin contact is usually low risk, but prolonged exposure to dry powder may cause dryness or mild irritation.
It can absorb natural skin oils.
Protective gloves are recommended during extended handling.
Eye contact with bentonite dust may cause mechanical irritation.
Symptoms may include redness, discomfort, or tearing.
Eyes should be rinsed thoroughly with water if exposure occurs.
Inhalation of bentonite dust may cause respiratory irritation.
Fine particles can irritate the nose, throat, and lungs.
Prolonged or repeated exposure to high dust levels should be avoided.
Chronic inhalation of high concentrations of mineral dust may pose lung health risks, depending on particle composition.
Adequate ventilation and dust control measures are important.
Respiratory protection may be required in industrial settings.
Ingestion is considered low toxicity, but large amounts may cause gastrointestinal discomfort.
Bentonite is not intended for consumption unless specifically processed for food or pharmaceutical use.
Medical advice should be sought if large quantities are ingested.
Bentonite is non-flammable and does not pose a fire hazard under normal conditions.
However, dust accumulation may contribute to general industrial dust hazards.
Good housekeeping practices should be maintained.
