Bentonite CAS 1302-78-9
Introduction：Basic information about Bentonite CAS 1302-78-9, including its chemical name, molecular formula, synonyms, physicochemical properties, and safety information, etc.
Bentonite Basic information
| Product Name: | Bentonite |
| Synonyms: | MONTMORILLONITE;BENTONITE MAGMA;BENTONITE;BENTONITE (SODIUM FORM);FULLERS EARTH;KWK KRYSTAL KLEAR;albagelpremiumusp4444;pengruntu |
| CAS: | 1302-78-9 |
| MF: | Al2O3.4(SiO2).H2O |
| MW: | 360.31 |
| EINECS: | 215-108-5 |
| Product Categories: | UVCBs-inorganic;1302-78-9 |
| Mol File: | Mol File |
Bentonite Chemical Properties
| 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 BULKING ABSORBENT COLORANT VISCOSITY CONTROLLING |
| Cosmetic Ingredient Review (CIR) | Bentonite (1302-78-9) |
| InChIKey | KARVSHNNUWMXFO-UHFFFAOYSA-N |
| SMILES | [Si](=O)=O.[Si](=O)=O.[Si](=O)=O.[Si](=O)=O.[Al]21O[Al](O2)O1.O |
| CAS DataBase Reference | 1302-78-9 |
| EPA Substance Registry System | Bentonite (1302-78-9) |
Safety Information
| Risk Statements | 20/22-8 |
| Safety Statements | 22-24/25 |
| WGK Germany | 3 |
| RTECS | CT9450000 |
| TSCA | TSCA listed |
| Storage Class | 11 - Combustible Solids |
| Hazardous Substances Data | 1302-78-9(Hazardous Substances Data) |
| Toxicity | LD50 intravenous in rat: 35mg/kg |
| Description | Bentonite is a light yellow, creamy, palebrown or gray to black powder or granules. These chemicals contain 1- 24% crystalline silica (O2Si). Specificgravity (H2O:1)=2.5. Hazard Identification (based onNFPA-704 M Rating System): Health 2, Flammability 1,Reactivity 0. Insoluble in water |
| Chemical Properties | Bentonite is a light yellow, creamy, palebrown or gray to black powder or granules. |
| Chemical Properties | Bentonite is a crystalline, claylike mineral, and is available as anodorless, pale buff, or cream to grayish-colored fine powder, whichis free from grit. It consists of particles about 50–150 mm in sizealong with numerous particles about 1–2μm. Microscopic examinationof samples stained with alcoholic methylene blue solutionreveals strongly stained blue particles. Bentonite may have a slightearthy taste. |
| Uses | Bentonite is a general purpose additive that is used as a pigment and colorant and to clarify and stabilize wine. |
| Uses | filler in cosmetics and other products, gel, or solid if dry |
| Uses | As of Fuller's earth; as emulsifier for oils; as a base for plasters. Pharmaceutic aid (suspending agent). |
| Uses | bentonite (bentonite clay) 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. |
| Production Methods | Bentonite is a native, colloidal, hydrated aluminum silicate, found inregions of Canada and the USA. The mined ore is processed toremove grit and nonswelling materials so that it is suitable forpharmaceutical applications. |
| Definition | A type of claythat is used as an adsorbent in makingpaper. The gelatinous suspension it formswith water is used to bind together thesand for making iron castings. Chemicallybentonite is an aluminosilicate of variablecomposition. |
| General Description | Bentonite is comprised primarily of the smectite group (montmorillonite) of clay minerals. It is widely used in various industrial applications such as clarification of edible and mineral oils, paints, cosmetics, and pharmaceuticals. It is also used as an adsorbent for the elimination of pollutants from wastewater. 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. |
| Pharmaceutical Applications | Bentonite is a naturally occurring hydrated aluminum silicate usedprimarily in the formulation of suspensions, gels, and sols, fortopical pharmaceutical applications. It is also used to suspendpowders in aqueous preparations and to prepare cream basescontaining 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 adsorbcationic drugs and so retard their release. Adsorbents are alsoused to mask the taste of certain drugs. Bentonite has been investigated as a diagnostic agent formagnetic resonance imaging. Therapeutically, bentonite has been investigated as an adsorbentfor lithium poisoning. |
| Agricultural Uses | Bentonite, also known as montmorillonite, volcanicclay, soap clay and amargosite, is a soft, plastic, lightcolored,porous rock consisting largely of colloidalsilica. Composed essentially of clay minerals, it swellsextensively when wet. Bentonite belongs chiefly to themontmorillonite group and has two varieties: (a) sodiumbentonite, with a high swelling capacity in water, and(b) calcium bentonite, with negligible swelling capacity. Bentonite is used variously as a suspending aid, agelatinous slurry to extinguish fire, a paint thickener, andas a sealant for earthen pots. Bentonite is also widely usedin metallurgy, soap manufacture, and in petroleumrefining because of its high decolorizing power andstrong adsorbing capacity. |
| Agricultural Uses | Clays exist in many forms, of which montmorillonite isone form. Kaolinite and montmorillonite, which are clayminerals, have different layer structures with differingabilities to absorb and retain water, and to adsorb andexchange cations. Montmorillonites have an expanding structure (2: 1)and have high cation exchange capacity (80 to 120 mg per100 g). They have abundant black clay soils. Otherminerals in this group are biedellite and nontronite. |
| Safety Profile | Poison by intravenousroute causing blood clotting. Questionablecarcinogen with experimental tumorigenicdata. |
| Safety | Bentonite is mainly used in topical pharmaceutical formulations buthas also been used in oral pharmaceutical preparations, foodproducts, and cosmetics. Following oral administration, bentonite is not absorbed fromthe gastrointestinal tract. Bentonite is generally regarded as anontoxic and nonirritant material. LD50 (rat, IV): 0.035 g/kg |
| Potential Exposure | This material is used as Fuller’s earth;as a mineral, natural, or synthetic fiber; as an emulsifier foroils; as a base for plasters; in cosmetics, in polishes andabrasives; as a food additive and others. Bentonites are aluminatesilicate and can contain crystalline silica. The contentvaries widely from less than 1% to about 24% . |
| First aid | Inhalatio Move person to fresh air. Seek medical attention if necessary. Skin: Wash with water. Eyes:Wash with water as needed. Seek medical attention if necesvsary. |
| storage | Bentonite is hygroscopic, and sorption of atmospheric water shouldbe avoided. Aqueous bentonite suspensions may be sterilized by autoclaving.The solid material may be sterilized by maintaining it at 1708℃ for 1hour after drying at 1008℃. Bentonite should be stored in an airtight container in a cool, dryplace. |
| Shipping | Bentonite is not cited in the DOT Performance-Oriented Packaging Standards. |
| Incompatibilities | Substance is a weak acid in water; avoidcontact with strong alkaline material. Incompatible withoxidizers (chlorates, nitrates, peroxides, permanganates,perchlorates, chlorine, bromine, fluorine, etc.); contact maycause fires or explosions. Keep away from alkaline materials,strong bases, strong acids, oxoacids, epoxides. |
| Incompatibilities | Aqueous bentonite suspensions retain their viscosity above pH 6,but are precipitated by acids. Acid-washed bentonite does not havesuspending properties. The addition of alkaline materials, such asmagnesium oxide, increases gel formation. Addition of significant amounts of alcohol to aqueous preparationswill precipitate bentonite, primarily by dehydration of thelattice structure. Bentonite particles are negatively charged and flocculationoccurs when electrolytes or positively charged suspensions areadded. Bentonite is thus said to be incompatible with strongelectrolytes, although this effect is sometimes used beneficially toclarify turbid liquids. The antimicrobial efficacy of cationic preservatives may bereduced in aqueous bentonite suspensions, but nonionic and anionicpreservatives are unaffected. Bentonite is incompatible with acriflavine hydrochloride. |
| Waste Disposal | Land fill disposal. |
| Regulatory Status | Accepted in Europe as a food additive in certain applications.Included in the FDA Inactive Ingredients Database (oral capsules,tablets and suspensions, topical suspensions, controlled releasetransdermal films and vaginal suppositories). Included in nonparenteralmedicines licensed in the UK. Included in the Canadian Listof Acceptable Non-medicinal Ingredients. |
Bentonite Preparation Products And Raw materials
| Raw materials | Sodium carbonate-->Mineral oil |
| Preparation Products | Montmorillonite K10-->anti water resistance to alkali,anti low temperature coating-->SODIUM ALUMINUM OXIDE-->medium temperature Shift catalysts-->medium(high)temperature Shift catalysts-->Oxytocin-->K-CATALYST-->Bentonite,calcium base-->ALUMINUM SILICATE-->clay activated for developer |
