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EC number: 203-326-3 | CAS number: 105-74-8
- 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
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:
- September 2009
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: The well conducted study was performed according to DRAFT EUR 20268 ENGuidance and under the Internal Management system. Certificate of analysis included in the report.
- Qualifier:
- according to guideline
- Guideline:
- other: ISO 2591-1, Test sieving – Part 1Methods using test sieves of woven wire cloth and perforated metal plate, December 1988
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: ISO3310-1, Test sieves – Technical requirements and testing – Part 1: Test sieves of metal wire cloth, July 1990
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: SMA721.02, Determination of the particle size distribution of powders and granular products
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: SMA743.02, Distribution of powders and granulated products in representative portions, August 1993
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: DRAFT EUR 20268 ENGuidance document on the determination of particle size distribution, fiber length and diameter distribution of chemical substances, 2002
- Deviations:
- no
- Principles of method if other than guideline:
- SMA is standard method of analysis, intern AkzoNobel.
- GLP compliance:
- no
- Type of method:
- sieving
- Type of distribution:
- volumetric distribution
- 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:
- 98.6 %
- No.:
- #2
- Size:
- < 100 µm
- Distribution:
- 1.4 %
- No.:
- #3
- Size:
- < 10 µm
- Distribution:
- 0.21 %
- No.:
- #4
- Size:
- < 5 µm
- Distribution:
- 0.09 %
- < 10 µm: 0.21%
- < 5 µm: 0.09%
- Conclusions:
- The particle size distribution (PSD) of dilauroyl peroxide is: < 100 µm 1.4 %, < 10 µm 0.21% and < 5 µm 0.09%. The shape of the fines is non-fibrous.
- Executive summary:
Light microscopic examination revealed that the dilauryol peroxide sample contained a small amount of fines.
The shape of the fines is non-fibrous.
This observation is confirmed by sieving the sample over a 100µm sieve. A small amount of fines were sieved off (1.4 m/m%).
The characteristics of the PSD of the fraction < 100 µm are:
Characteristics of the PSD
d10
[µm]
7.0
d50
[µm]
29
d90
[µm]
88
From the whole product 0.21% is < 10 µm and 0.09% is < 5 µm.
The particle size distribution (PSD) of di-lauroyl peroxide is: < 100 µm 1.4 %, < 10 µm 0.21% and < 5 µm 0.09%.
Reference
Light microscopic examinations
see attachment
This picture shows that in addition to the di-lauroyl peroxide flakes, a small amount of fines are present. The shape of the fines is non-fibrous.
Sieving
Fraction |
Amount |
|
|
[g] |
[%] |
<100 μm |
2.49 |
1.4 |
>100 μm |
181.94 |
98.6 |
Graphs of the PSD
see attachment
PSD by laser diffraction
The PSD of the fraction <100mm is determined by laser light diffraction. Next table presents the results.
PSD analysis results
Sample |
d10 |
d50 |
d90 |
|
[µm] |
[µm] |
[µm] |
1 |
6.94 |
28.74 |
85.62 |
2 |
7.12 |
29.90 |
92.16 |
3 |
6.95 |
29.01 |
85.84 |
Average |
7.0 |
29 |
88 |
St. Dev. |
0.1 |
0.6 |
3.7 |
From these data it is calculated that from the fraction < 100 µm 15.4% is < 10 µm and 6.7% is < 5 µm. For the whole product it means:
Description of key information
The particle size distribution (PSD) of di-lauroyl peroxide is: < 100 µm 1.4 %, < 10 µm 0.21% and < 5 µm 0.09%. The shape of the fines is non-fibrous.
Additional information
Light microscopic examination revealed that the di-lauroyl peroxide sample contained a small amount of fines.
This observation is confirmed by sieving the sample over a 100 μm sieve. A small amount of fines were sieved off (1.4 m/m%).
The PSD of the fraction <100µm is determined by laser light diffraction.
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