hectorite (clay mineral)
clay constituent of bentonite; approx. formula: na0.67(mg,li)6si8020(oh,f)4.
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CAS Number: 12173-47-6Picture of molecule
ECHA EINECS - REACH Pre-Reg: 235-340-0
Molecular Weight: 360.58330928
Formula: H2 Li Mg Na O12 Si4
Category: buffering agents
US / EU / FDA / JECFA / FEMA / FLAVIS / Scholar / Patent Information:
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Physical Properties:
Assay: 95.00 to 100.00 % 
Food Chemicals Codex Listed: No
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Organoleptic Properties:
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Cosmetic Information:
CosIng: cosmetic data
Cosmetic Uses: absorbents
bulking agents
viscosity controlling agents
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 None found
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Safety Information:
Hazards identification
Classification of the substance or mixture
GHS Classification in accordance with 29 CFR 1910 (OSHA HCS)
None found.
GHS Label elements, including precautionary statements
Hazard statement(s)
None found.
Precautionary statement(s)
None found.
Oral/Parenteral Toxicity:
Not determined
Dermal Toxicity:
Not determined
Inhalation Toxicity:
Not determined
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Safety in Use Information:
Category: buffering agents
Recommendation for hectorite usage levels up to:
 not for fragrance use.
Recommendation for hectorite flavor usage levels up to:
 not for flavor use.
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Safety References:
EPA ACToR: Toxicology Data
EPA Substance Registry Services (SRS): Registry
Laboratory Chemical Safety Summary : 72941499
National Institute of Allergy and Infectious Diseases: Data
Chemidplus: 0012173476
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NIST Chemistry WebBook: Search Inchi
Pubchem (cid): 72941499
Pubchem (sid): 135296272
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Other Information:
(IUPAC): Atomic Weights of the Elements 2009
(IUPAC): Atomic Weights of the Elements 2009 (pdf)
Videos: The Periodic Table of Videos
tgsc: Atomic Weights use for this web site
(IUPAC): Periodic Table of the Elements
HMDB (The Human Metabolome Database): Search
Wikipedia: View
RSC Learn Chemistry: View
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Potential Blenders and core components note
None Found
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Potential Uses:
 viscosity controlling agents 
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Occurrence (nature, food, other): note
 not found in nature
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 hectorite ((Mg2.67Li0.33)Si4Na0.33(F0.5-1(OH)0-0.5)2O10)
 hectorite (clay mineral)
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PubMed: Long-term self-assembly of inorganic layered materials influenced by the local states of the interlayer cations.
PubMed: Notch insensitive and self-healing PNIPAm-PAM-clay nanocomposite hydrogels.
PubMed: Novel bimetallic core-shell nanocrystal-clay composites with superior catalytic activities.
PubMed: Safety assessment of ammonium hectorites as used in cosmetics.
PubMed: Organization of mixed dimethyldioctadecylammonium and choline modifiers on the surface of synthetic hectorite.
PubMed: Temperature-sensitivity and cell biocompatibility of freeze-dried nanocomposite hydrogels incorporated with biodegradable PHBV.
PubMed: Cell proliferation and cell sheet detachment from the positively and negatively charged nanocomposite hydrogels.
PubMed: Template free synthesis of mesoporous hectorites: efficient host for pH responsive drug delivery.
PubMed: Synthesis of highly active and thermally stable nanostructured Pt/clay materials by clay-mediated in situ reduction.
PubMed: Nanoplatelets of sodium hectorite showing aspect ratios of ≈20,000 and superior purity.
PubMed: Tailoring the pore sizes of microporous pillared interlayered clays through layer charge reduction.
PubMed: Accelerated cell sheet detachment by copolymerizing hydrophilic PEG side chains into PNIPAm nanocomposite hydrogels.
PubMed: Proliferation and harvest of human mesenchymal stem cells using new thermoresponsive nanocomposite gels.
PubMed: Effects of added silica nanoparticles on hectorite gels.
PubMed: UV-cured, flexible, and transparent nanocomposite coating with remarkable oxygen barrier.
PubMed: Adsorption and photocatalytic oxidation of formaldehyde on a clay-TiO2 composite.
PubMed: X-ray studies of carbon dioxide intercalation in Na-fluorohectorite clay at near-ambient conditions.
PubMed: Development of soft nanocomposite materials and their applications in cell culture and tissue engineering.
PubMed: Retraction notice to "Application of natural and modified hectorite clays as adsorbents to removal of Cr(VI) from aqueous solution--thermodynamic and equilibrium study" [J. Hazard. Mater. 172 (2009) 507-514].
PubMed: Retraction notice to: Modification of hectorite by organofunctionalization for use in removing U(VI) from aqueous media: thermodynamic approach.
PubMed: Molecular Characteristics of Poly(N-isopropylacrylamide) Separated from Nanocomposite Gels by Removal of Clay from the Polymer/Clay Network.
PubMed: Water dynamics in hectorite clays: influence of temperature studied by coupling neutron spin echo and molecular dynamics.
PubMed: Successful transplantation of in vitro expanded human corneal endothelial precursors to corneal endothelial surface using a nanocomposite sheets.
PubMed: Thermoresponsible Cell Adhesion/Detachment on Transparent Nanocomposite Films Consisting of Poly(2-methoxyethyl acrylate) and Clay.
PubMed: Determination of lipid peroxidation and cytotoxicity in calcium, magnesium, titanium and hectorite (SHCa-1) suspensions.
PubMed: Barrier properties of synthetic clay with a kilo-aspect ratio.
PubMed: Preparation and luminescence properties of lanthanide (Eu3+, Sm3+) complexes and their hectorite-based composites.
PubMed: Uranium uptake by hectorite and montmorillonite: a solution chemistry and polarized EXAFS study.
PubMed: Preferential adsorption of poly(ethylene glycol) on hectorite clay and effects on poly(N-isopropylacrylamide)/hectorite nanocomposite hydrogels.
PubMed: Sites of Lu(III) sorbed to and coprecipitated with hectorite.
PubMed: Equilibrium models and kinetic for the adsorption of methylene blue on Co-hectorites.
PubMed: Lipid peroxidation induced by expandable clay minerals.
PubMed: Modification of hectorite by organofunctionalization for use in removing U(VI) from aqueous media: thermodynamic approach.
PubMed: Reversibility of La and Lu sorption onto smectites: implications for the design of engineered barriers in deep geological repositories.
PubMed: Application of natural and modified hectorite clays as adsorbents to removal of Cr(VI) from aqueous solution--thermodynamic and equilibrium study.
PubMed: Efficiency of clay--TiO2 nanocomposites on the photocatalytic elimination of a model hydrophobic air pollutant.
PubMed: Highly enantioselective asymmetric autocatalysis using chiral ruthenium complex-ion-exchanged synthetic hectorite as a chiral initiator.
PubMed: Photoinduced charge separation in a colloidal system of exfoliated layered semiconductor controlled by coexisting aluminosilicate clay.
PubMed: Signature of low-dimensional diffusion in complex systems.
PubMed: TRLFS characterization of Eu(III)-doped synthetic organo-hectorite.
PubMed: Particle tracking to reveal gelation of hectorite dispersions.
PubMed: Realisation of truly microporous pillared clays.
PubMed: Model for cage formation in colloidal suspension of laponite.
PubMed: Linkage effects of chromium(III) acetylacetonato units on chiral induction of liquid crystal phases.
PubMed: Electron paramagnetic resonance study of partially oriented clay platelets intercalated with copper(II) 1,4,8,11-tetraazacyclotetradecane.
PubMed: Nanoporosity of an organo-clay shown by hyperpolarized xenon and 2D NMR spectroscopy.
PubMed: Comments on "Equilibrium studies for the adsorption of acid dye onto modified hectorite".
PubMed: Photooxidation of dibenzothiophene on TiO(2)/hectorite thin films layered catalyst.
PubMed: Equilibrium studies for the adsorption of acid dye onto modified hectorite.
PubMed: EPR monitoring of the bioavailability of an organic xenobiotic (4-hydroxy-TEMPO) in model clay suspensions and pastes.
PubMed: Spectroscopic study of carbaryl sorption on smectite from aqueous suspension.
PubMed: Adsorption study of cationic dyes having a trimethylammonium anchor group on hectorite using electrooptic and spectroscopic methods.
PubMed: Electron paramagnetic resonance analysis of the distribution of a hydrophobic spin probe in suspensions of humic acids, hectorite, and aluminum hydroxide-humate-hectorite complexes.
PubMed: Multidimensional 2H NMR study of dynamical heterogeneity in polymer nanocomposites.
PubMed: Preparation of a novel PEG-clay hybrid as a DDS material: dispersion stability and sustained release profiles.
PubMed: Prevention of zearalenone-induced hyperestrogenism in prepubertal mice.
PubMed: Magnetic birefringence of minerals.
PubMed: Thermally-treated clay as a stationary phase in liquid chromatography.
PubMed: Sorption and oxic degradation of the explosive CL-20 during transport in subsurface sediments.
PubMed: Effect of coal mine dust and clay extracts on the biological activity of the quartz surface.
PubMed: Final report on the safety assessment of aluminum silicate, calcium silicate, magnesium aluminum silicate, magnesium silicate, magnesium trisilicate, sodium magnesium silicate, zirconium silicate, attapulgite, bentonite, Fuller's earth, hectorite, kaolin, lithium magnesium silicate, lithium magnesium sodium silicate, montmorillonite, pyrophyllite, and zeolite.
PubMed: Reactivity of Fe(II) species associated with clay minerals.
PubMed: High-sensitivity multinuclear NMR spectroscopy of a smectite clay and of clay-intercalated polymer.
PubMed: Heterogeneous decomposition of CHF2OCH2CF3 and CHF2OCH2C2F5 over various standard aluminosilica clay minerals in air at 313 K.
PubMed: Sorption of phenanthrene by reference smectites.
PubMed: Analysis of peptides synthesized in the presence of SAz-1 montmorillonite and Cu(2+) exchanged hectorite.
PubMed: Fenuron sorption on homoionic natural and modified smectites.
PubMed: The interaction of biological molecules with clay minerals: a scanning force microscopy study.
PubMed: Sorption of Metal Ions on Clay Minerals.
PubMed: Silica, alumina and clay catalyzed peptide bond formation: enhanced efficiency of alumina catalyst.
PubMed: Spectroscopy of Methylene Blue-Smectite Suspensions.
PubMed: Sorption of Metal Ions on Clay Minerals.
PubMed: Site-specific prebiotic oligomerization reactions of glycine on the surface of hectorite.
PubMed: NOTE
PubMed: The effect of smectite composition on the catalysis of peptide bond formation.
PubMed: 1H NMR study of the structure and dynamics of water confined between wetting solids.
PubMed: Registered state and a two-dimensional Bose liquid of 4He in mesopores of hectorite.
PubMed: Stepwise formation of multilayered nanostructural films from macromolecular precursors.
PubMed: Deuterium and oxygen-17 nuclear magnetic resonance of aqueous clay suspensions.
PubMed: Characterization and adsorptive properties of pharmaceutical grade clays.
PubMed: Synthetic hectorite - a new toothpaste binder.
PubMed: The influence of various cations on the catalytic properties of clays.
PubMed: Use of phospholipid-clay complexes for determining vibrational spectra of membrane related systems.
PubMed: Determination of yield value of hectorite gels by the falling sphere method.
PubMed: Relations between particle shape, particle interaction and some rheological properties of hectorite dispersions.
PubMed: Electrooptic birefringence and scattering of hectorite suspensions.
PubMed: Investigations on hectorite.
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