Registration Dossier
Registration Dossier
Diss Factsheets
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EC number: 285-349-9 | CAS number: 85085-18-3
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data

Endpoint summary
Administrative data
Description of key information
Additional information
This substance, Laponite Type 1 (Silicate(2-), hexafluoro-, disodium, reaction products with lithium magnesium sodium silicate), is an inorganic layered silicate structure with a unit cell of the following compositionNa0.7+[(Si8Mg5.5Li0.3) O20(OH)2.5F1.5]0.7-
It is an inorganic synthetic version of hectorite clay, which occurs in nature and is in the smectite group of clays, which includes bentonite.
It is available as a white odourless free flowing powder with a particle size in the 1 - 250 micron range. It has no measurable freezing point, melting point or boiling point. At temperatures above 1000 deg C it does not actually melt but sinters, at which point the layered structure is destroyed and the elements are converted to their oxides.
This substance does not dissolve in water but forms a slightly cloudy colloidal dispersion. The material disperses to form disc-shaped crystals whose primary particle size is very small resulting in translucent and colourless dispersions, invisible to the naked eye. At concentrations above 2% in water a gel is formed
The natural pH of Laponite® type 1 lies in the range 8.1 - 9.5 after dispersion in water at 0.5% w/w concentration. Studies showing the effect of pH on the stability of the dispersion demonstrate that this substance is stable between pH 4 and its natural pH and does not exhibit any dissociation or hydrolysis in this range. At pH 1-4 partial digenstion into the individual cations is observed.
This substance shows no flammable, explosive or oxidising properties.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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