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EC number: 240-815-0 | CAS number: 16752-77-5
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
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions) - Method B: Fibre Length and Diameter Distributions
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7520 (Particle Size, Fiber Length, and Diameter Distribution)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: CIPAC MT 187
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- ISO 13320 (Particle size analysis - Laser diffraction methods)
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- Laser scattering/diffraction
- Specific details on test material used for the study:
- Purity: 100%
- Mass median aerodynamic diameter:
- 940 µm
- Key result
- Percentile:
- D10
- Mean:
- 470 µm
- St. dev.:
- 17
- Key result
- Percentile:
- D50
- Mean:
- 940 µm
- St. dev.:
- 42.4
- Key result
- Percentile:
- D90
- Mean:
- 1 990 µm
- St. dev.:
- 91.9
- Conclusions:
- Methomyl TGAI was determined to have d(0.1), d(0.5) and d(0.9) values of 470, 940 and 1990 μm, respectively.
- Executive summary:
The study was conducted in accordance with guidelines to meet the requirements of Commission Regulation (EU) No 283/2013 of 01 March 2013 implementing Regulation No 1107/2009; and the US Environmental Protection Agency, Office of Chemical Safety and Pollution Prevention (OCSPP), Series 830: Product Properties Test Guidelines.
The particle size distribution was assessed using a technique based on laser diffraction in accordance with CIPAC MT 187.
Methomyl TGAI was determined to have d(0.1), d(0.5) and d(0.9) values of 470, 940 and 1990 μm, respectively.
d(0.1) is the diameter where 90% of the distribution is above and 10% is below.
d(0.5) is the diameter where 50% of the distribution is above and 50% is below. The is referred to as the Mass Median Diameter (MMD).
d(0.9) is the diameter where 10% of the distribution is above and 90% is below.
Reference
It can be seen from the data that some particles above 3.5 mm were not measured due to the range of the instrument. This was not considered significant due to the fact that the majority of the test item was accounted for.
Description of key information
OECD 110; OPPTS 830.7250; CIPAC MT 187; ISO 13320
Additional information
d(0.1), d(0.5) and d(0.9) values of 470, 940 and 1990 μm, respectively.
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