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Diss Factsheets
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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
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Nanomaterial agglomeration / aggregation
Administrative data
- Endpoint:
- nanomaterial agglomeration/aggregation
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2010-2011
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 011
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: internal method ASM.MDA.024
- Principles of method if other than guideline:
- Internal standard ASM.MDA.024: "Qualitative characterization of Carbon Nanotube powders by scanning electron microscopy".
- GLP compliance:
- no
- Other quality assurance:
- other: ISO 9001 Standard
- Type of method:
- scanning electron microscopy
- Details on methods and data evaluation:
- Ten balls with irregular "macroscopic" appearence are located on one to three surveys of CNT balls (SEM images at a magnification of 100 times). An image is taken at magnification of 5000 times or 10000 times of specific places to visualize some little aggregates. Then, more accurate obeservations require magnification of 20000 times,30000 times, 40000 times, 50000 times, 60000 times or 100000 times to try to see the borders or the interconnections between little aggregates within a ball.
The secondary electron "SE" detector is used for the views at low magnification of 100 times, the "in lens" detector (at th extremity of the electon) is used for the views at higher magnifications. - Sampling:
- - Preparation of test samples and references: Sample preparation: CNT powder is spread onto a microscopy sample holder covedred with a carbon two-sided adhesive tape. The sample holder is tapped on a moistened paper set down on the table (under the ventilated hood) in order to remove the excess of powder. Three replicates of the same sample can be prepared in the same way.
CNT observation is carried out without metallization.
- Measurement procedure: The sample holder is carried to the microscope in a closed box and observations were performed under high vacuum and under a voltage of 5kV.
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
- Specific details on test material used for the study:
- The CNT can be exmined in the microscope without any other preparation or, when necessary, the sample can be metallized with gold to enhance its electric conductivity, before being examined in the microscope.
The different stages from the starting up of the miscroscope, the complete gun and column alignment, to the particular working modes are described in a detailed manner in the operating manuals provided by instrument manufacturer.
To study "aggregation" or "agglomeration", CNT observation is carried out without metallization, under high vaccum and under a voltage of 5 kV.
Data gathering
- Instruments:
- Scanning Electron Microscope ZEISS Leo type 1530 model VP equipped with and X-rays analyser OXFORD type "Energy 200".
Results and discussion
Any other information on results incl. tables
For the "aggregation" or "agglomeration" characterization, the results are given in the form of numeric images in .jpeg format. Only qualitative results can be given by SEM images.
Applicant's summary and conclusion
- Conclusions:
- In carbon nanotube powder of the test item, carbon nanotubes were entangled, connected to each othe inside the same ball; some entangled nanotubes went from one aggragate to another aggregate inside the same ball.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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