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Diss Factsheets
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EC number: 202-653-9 | CAS number: 98-29-3
- 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
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Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- report date: 2010-06-30
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Standardised method performed on all internal powders and flakes
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Sieving analysis was performed on flakes. Fine fractions (particles < 100 µm) coming from sieving analysis were characterized by laser diffraction particle size analysis
- GLP compliance:
- no
- Type of method:
- sieving
- Type of distribution:
- volumetric distribution
- Key result
- Percentile:
- D50
- Remarks on result:
- other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
- No.:
- #1
- Size:
- < 100 µm
- Distribution:
- 0.04 %
- No.:
- #1
- Size:
- > 100 - < 200 µm
- Distribution:
- 0.4 %
- No.:
- #1
- Size:
- > 200 - < 500 µm
- Distribution:
- 1.25 %
- No.:
- #1
- Size:
- > 500 - < 1 000 µm
- Distribution:
- 2.46 %
- No.:
- #1
- Size:
- > 1 000 - < 5 000 µm
- Distribution:
- 61.52 %
- No.:
- #1
- Size:
- > 5 000 µm
- Distribution:
- 36.02 %
- Conclusions:
- Particle size distribution of 4-tert-butylpyrocatechol was characterized through sieving. The majority of flakes were in the range of 1000 to 5000 µm (and higher).
Very little quantity of flakes below 100 µm was present (0.04%). - Executive summary:
In a study (Laboratory LDIPH, 2010), the particle size of 4 -tert-butylpyrocatechol was characterized through sieving.
The majority of flakes were in the range of 1000 to 5000 µm (and higher). Very little quantity of flakes below 100 µm was present (0.04%).
Reference
Sieving analysis:
As it was not possible to divide the representative sample by processing it on the Retsch Sample Rotating Divider PT100, the size analysis was done on five manual sampling from the representative sample obtained on the Restch Rotating Tube Divider PK1000.
Average results for these five samples were presented here after (weight % for a particle size class):
- 4 -TBC flakes are in major part with sizes in the range 1000 to 5000 µm (61.5% weight)
- 36.0% weight > 5000 µm
- Very little fraction of fines < 100 µm is collected: 0.04% weight (see laser diffusion analysis)
Granulometric analysis Laser Diffraction Sympatec of fines < 100 µm obtained by sieving analysis:
Detector R4 was used for the fine particles < 100 µm separated during sieving tests (operating range from 1.8 µm to 350 µm).
X10 = 35.9 µm
X50 = 96.3 µm
X90 = 184.8 µm
Fines < 100 µm = 54.0 % w/w
Fragility of particles:
Fragility tests were realized on flakes products with internal sieving method.
Results on fragility were the particle size distribution compared with standard sieving analysis described above. Average results were presented for 2 measurements.
Flakes of 4 -TBC were not fragile, 95.2% weight were kept in their original size.
No more generation of fines < 100 µm by attrition.
Description of key information
Range of the particle size distribution: 1000 to 5000 µm
Additional information
One experimental study (Laboratory LDIPH, 2010) with reliability 1 according to Klimisch was available and was selected as key study. Particle size distribution was characterized through sieving.
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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