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EC number: 701-160-0 | CAS number: -
- 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
![](https://echa.europa.eu./o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_physical-and-chemical-properties.png)
Nanomaterial Zeta potential
Administrative data
- Endpoint:
- nanomaterial Zeta potential
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2010
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Guideline study, no GLP compliance
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 011
- Report date:
- 2011
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: Internal method for zeta potential "ACP 16022011"
- Principles of method if other than guideline:
- Zeta potential is a characteristic of the repulsive forces between particles. It is determined by measuring the speed of motion of a particle subjected to an electric fiels.
- GLP compliance:
- no
- Other quality assurance:
- other: ISO 9001:2008
- Type of method:
- other: zetameter apparatus
- Details on methods and data evaluation:
- In general, a particle is negatively charged. A fixed positive ion layer surrounds it (the particle moves with this layer). Outside the particle, in the diffusion layer, the potential varies to achieve neutrality in the bulk solution. Zeta potential is the potential difference between the borders of the diffuse layer.
Zeta potential is a characteristic of the repulsive forces between particles. It is determined by measuring the speed of motion of a particle subjected to an electric fiels.
Test material
- Reference substance name:
- GRAPHISTRENGTH C100
- IUPAC Name:
- GRAPHISTRENGTH C100
- Reference substance name:
- Tangled Multi-Walled Carbon Nanotubes
- EC Number:
- 701-160-0
- Cas Number:
- 7782-42-5
- Molecular formula:
- Hollow tubular carbon, 1-dimensional nano structures with hexagonal arrangement of carbon atoms
- IUPAC Name:
- Tangled Multi-Walled Carbon Nanotubes
- Test material form:
- solid: nanoform
Constituent 1
Constituent 2
Data gathering
- Instruments:
- The zetameter apparatus, from CAD Instrumentation Company, is equipped with a laser and a video camera. An electric field s applied between two electrodes separated by a distance of 11.5 cm in the horizontal quartz cell. The filling of the cell is done by a 50 ml syringe fitted with a 3 -way valve.
Prior to the introduction on the measurement cell, the CNT's suspension us sieved at 45µm.
Results and discussion
Zeta potentialopen allclose all
- Zeta potential:
- ca. -44.99 mV
- Medium:
- NaCl solution at 1g/L, sieved at 45µm and at 21.3°C
- Remarks on result:
- other: Trial 1
- Zeta potential:
- ca. -42.62 mV
- Medium:
- NaCl solution at 1g/L, sieved at 45µm and at 21.3°C
- Remarks on result:
- other: Trial 2
- Zeta potential:
- ca. -44.59 mV
- Medium:
- NaCl solution at 1g/L, sieved at 45µm and at 21.3°C
- Remarks on result:
- other: Trial 3
- Zeta potential:
- ca. -36.74 mV
- Medium:
- NaCl solution at 1g/L, sieved at 45µm and at 21.3°C
- Remarks on result:
- other: Trial 4
- Zeta potential:
- ca. -41.49 mV
- Medium:
- NaCl solution at 1g/L, sieved at 45µm and at 21.3°C
- Remarks on result:
- other: Trial 5
- Zeta potential:
- ca. -44.78 mV
- Medium:
- NaCl solution at 1g/L, sieved at 45µm and at 21.3°C
- Remarks on result:
- other: Trial 6
- Zeta potential:
- ca. -46.61 mV
- Medium:
- NaCl solution at 1g/L, sieved at 45µm and at 21.3°C
- Remarks on result:
- other: Trial 7
- Zeta potential:
- ca. -49.18 mV
- Medium:
- NaCl solution at 1g/L, sieved at 45µm and at 21.3°C
- Remarks on result:
- other: Trial 8
- Zeta potential:
- ca. -47.07 mV
- Medium:
- NaCl solution at 1g/L, sieved at 45µm and at 21.3°C
- Remarks on result:
- other: Trial 9
- Zeta potential:
- ca. -40.93 mV
- Medium:
- NaCl solution at 1g/L, sieved at 45µm and at 21.3°C
- Remarks on result:
- other: Trial 10
- Zeta potential:
- ca. -41.63 mV
- Medium:
- NaCl solution at 1g/L, sieved at 45µm and at 21.3°C
- Remarks on result:
- other: Trial 11
- Key result
- Zeta potential:
- ca. -43.69 mV
- St. dev.:
- 3.46 mV
- Medium:
- NaCl solution at 1g/L, sieved at 45µm and at 21.3°C
- Remarks on result:
- other: average
Any other information on results incl. tables
Eleven measurements have been performed, resulting in a mean value of -43.69 mV with a standard deviation of 3.46 mV.
pH was 6.5 -7 during the experiement.
Applicant's summary and conclusion
- Conclusions:
- Zeta potential of CNTs particles in suspension in NaCl solution at 1 g/l and sieved at 45µm is -44 mV at 21.3°C
- Executive summary:
The zeta potential of carbon nanotubes powder was determined using internal methodACP 16022011. This test shows that the test item has a zeta potential of -44 mV at 21.3°C.
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