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            Bentonit

            Bentonite Struktur
            1302-78-9
            CAS-Nr.
            1302-78-9
            Bezeichnung:
            Bentonit
            Englisch Name:
            Bentonite
            Synonyma:
            MONTMORILLONITE;CI 77004;volclay;FULLERS EARTH;BENTONITE MAGMA;MONTMORILLONITECLAY;hi-jel;magbond;tixoton;otaylite
            CBNumber:
            CB3307188
            Summenformel:
            Al2O3.4(SiO2).H2O
            Molgewicht:
            360.31
            MOL-Datei:
            Mol file

            Bentonit Eigenschaften

            Dichte
            2~3g/cm3
            L?slichkeit
            Practically insoluble in water and in aqueous solutions. It swells with a little water forming a malleable mass.
            Aggregatzustand
            powder
            Farbe
            Light yellow or green, cream,pink, gray to black solid
            Wasserl?slichkeit
            Insoluble in water and forms a colloidal solution.
            Merck 
            14,1055
            Stabilit?t:
            Stable.
            CAS Datenbank
            1302-78-9
            EPA chemische Informationen
            Bentonite (1302-78-9)

            Sicherheit

            R-S?tze: 20/22-8
            S-S?tze: 22-24/25
            WGK Germany  3
            RTECS-Nr. CT9450000
            TSCA  Yes
            Giftige Stoffe Daten 1302-78-9(Hazardous Substances Data)
            Toxizit?t LD50 intravenous in rat: 35mg/kg

            Bentonit Chemische Eigenschaften,Einsatz,Produktion Methoden

            ERSCHEINUNGSBILD

            GERUCHLOSE K?RNCHEN ODER PULVER IN UNTERSCHIEDLICHEN FARBEN.

            CHEMISCHE GEFAHREN

            Schwache Base als Suspension in Wasser.

            ARBEITSPLATZGRENZWERTE

            TLV nicht festgelegt (ACGIH 2005).

            AUFNAHMEWEGE

            Aufnahme in den K?rper durch Inhalation des Staubes.

            INHALATIONSGEFAHREN

            Verdampfung bei 20°C vernachl?ssigbar; eine gesundheitssch?dliche Partikelkonzentration in der Luft kann jedoch schnell erreicht werden.

            WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION

            M?glich sind Auswirkungen auf die Lunge mit nachfolgender Silikose auf Grund der Anwesenheit von kristallinem Siliciumdioxid (s. ICSC 0808).

            LECKAGE

            Verschüttetes Material in Beh?ltern sammeln; falls erforderlich durch Anfeuchten Staubentwicklung verhindern. Pers?nliche Schutzausrüstung: Atemschutzger?t, P1-Filter für inerte Partikel.

            R-S?tze Betriebsanweisung:

            R20/22:Gesundheitssch?dlich beim Einatmen und Verschlucken.
            R8:Feuergefahr bei Berührung mit brennbaren Stoffen.

            S-S?tze Betriebsanweisung:

            S22:Staub nicht einatmen.
            S24/25:Berührung mit den Augen und der Haut vermeiden.

            Chemische Eigenschaften

            Bentonite is a light yellow, creamy, pale brown or gray to black powder or granules.

            Verwenden

            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.

            Definition

            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.

            Vorbereitung Methode

            Bentonite is a native, colloidal, hydrated aluminum silicate, found in regions of Canada and the USA. The mined ore is processed to remove grit and nonswelling materials so that it is suitable for pharmaceutical applications.

            Allgemeine Beschreibung

            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.

            Pharmazeutische Anwendungen

            Bentonite is a naturally occurring hydrated aluminum silicate used primarily in the formulation of suspensions, gels, and sols, for topical pharmaceutical applications. It 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.

            Landwirtschaftliche Anwendung

            Bentonite, also known as montmorillonite, volcanic clay, soap clay and amargosite, is a soft, plastic, lightcolored, porous rock consisting largely of colloidal silica. Composed essentially of clay minerals, it swells extensively when wet. Bentonite belongs chiefly to the montmorillonite group and has two varieties: (a) sodium bentonite, with a high swelling capacity in water, and (b) calcium bentonite, with negligible swelling capacity.
            Bentonite is used variously as a suspending aid, a gelatinous slurry to extinguish fire, a paint thickener, and as a sealant for earthen pots. Bentonite is also widely used in metallurgy, soap manufacture, and in petroleum refining because of its high decolorizing power and strong adsorbing capacity.

            Sicherheitsprofil

            Poison by intravenous route causing blood clotting. Questionable carcinogen with experimental tumorigenic data.

            Sicherheit(Safety)

            Bentonite is mainly used in topical pharmaceutical formulations but has also been used in oral pharmaceutical preparations, food products, and cosmetics.
            Following oral administration, bentonite is not absorbed from the gastrointestinal tract. Bentonite is generally regarded as a nontoxic and nonirritant material.
            LD50 (rat, IV): 0.035 g/kg

            m?gliche Exposition

            This material is used as Fuller’s earth; as a mineral, natural, or synthetic fiber; as an emulsifier for oils; as a base for plasters; in cosmetics, in polishes and abrasives; as a food additive and others. Bentonites are aluminate silicate and can contain crystalline silica. The content varies widely from less than 1% to about 24% .

            Lager

            Bentonite is hygroscopic, and sorption of atmospheric water should be avoided.
            Aqueous bentonite suspensions may be sterilized by autoclaving. The solid material may be sterilized by maintaining it at 1708℃ for 1 hour after drying at 1008℃.
            Bentonite should be stored in an airtight container in a cool, dry place.

            Versand/Shipping

            Bentonite is not cited in the DOT Performance- Oriented Packaging Standards.

            Inkompatibilit?ten

            Aqueous bentonite suspensions retain their viscosity above pH 6, but are precipitated by acids. Acid-washed bentonite does not have suspending properties. The addition of alkaline materials, such as magnesium oxide, increases gel formation.
            Addition of significant amounts of alcohol to aqueous preparations will precipitate bentonite, primarily by dehydration of the lattice structure.
            Bentonite particles are negatively charged and flocculation occurs when electrolytes or positively charged suspensions are added. Bentonite is thus said to be incompatible with strong electrolytes, although this effect is sometimes used beneficially to clarify turbid liquids.
            The antimicrobial efficacy of cationic preservatives may be reduced in aqueous bentonite suspensions, but nonionic and anionic preservatives 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 release transdermal films and vaginal suppositories). Included in nonparenteral medicines licensed in the UK. Included in the Canadian List of Acceptable Non-medicinal Ingredients.

            Bentonit Upstream-Materialien And Downstream Produkte

            Upstream-Materialien

            Downstream Produkte


            Bentonit Anbieter Lieferant Produzent Hersteller Vertrieb H?ndler.

            Global( 242)Lieferanten
            Firmenname Telefon E-Mail Land Produktkatalog Edge Rate
            Henan Tianfu Chemical Co.,Ltd.
            0371-55170693
            info@tianfuchem.com China 22021 55
            Hebei Guanlang Biotechnology Co., Ltd.
            +86-19930503282 +86-19930503282
            alice@crovellbio.com China 5953 58
            Hubei xin bonus chemical co. LTD
            86-13657291602
            linda@hubeijusheng.com CHINA 23035 58
            Shandong chuangyingchemical Co., Ltd.
            18853181302
            sale@chuangyingchem.com CHINA 5917 58
            Shanghai Longyu Biotechnology Co., Ltd.
            +8615821988213
            info@longyupharma.com China 2522 58
            CONIER CHEM AND PHARMA LIMITED
            +8618523575427
            sales@conier.com China 47501 58
            career henan chemical co
            +86-0371-86658258
            factory@coreychem.com China 29862 58
            Hefei TNJ Chemical Industry Co.,Ltd.
            0551-65418671
            sales@tnjchem.com CHINA 34618 58
            Hebei Zhanyao Biotechnology Co. Ltd
            +8615369953316
            admin@zhanyaobio.com China 2152 58
            Shaanxi Dideu Medichem Co. Ltd
            29-89586680 +8618192503167
            1005@dideu.com China 9938 58

            1302-78-9(Bentonit)Verwandte Suche:


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