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EC number: 214-874-8 | CAS number: 1204-28-0
Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
- Endpoint:
- particle size distribution (granulometry)
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- the study does not need to be conducted because the substance is marketed or used in a non solid or granular form
- Justification for type of information:
- JUSTIFICATION FOR DATA WAIVING
The substance is described as a hygroscopic solid, where the crystals are sticked together due to moisture. So, study with laser diffraction or sieving methods is technically not feasible.
Moreover, the substance will not be marketed as such. Therefore, no further information is considered necessary. - Reason / purpose for cross-reference:
- data waiving: supporting information
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- other: Statement
- Remarks:
- based on the appearance of the test item according to international guidelines criteria
- Adequacy of study:
- supporting study
- Study period:
- 25 June 2015
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
- Version / remarks:
- May 12, 1981
- Qualifier:
- according to guideline
- Guideline:
- ISO 13320 (Particle size analysis - Laser diffraction methods)
- Version / remarks:
- 2009
- Qualifier:
- according to guideline
- Guideline:
- other: CIPAC MT 59
- Version / remarks:
- CIPAC, Physico-chemical Methods for Technical and Formulated Pesticides, MT 59: "Sieve Analysis";
CIPAC Handbook Volume F, 1995. - Qualifier:
- according to guideline
- Guideline:
- other: CIPAC MT 187
- Version / remarks:
- CIPAC, Physico-chemical Methods for Technical and Formulated Pesticides, MT 187: “Particle Size
Analysis by Laser Diffraction”; CIPAC Handbook Volume K, 2003. - GLP compliance:
- yes
- Remarks:
- (no certificate in report)
- Remarks on result:
- not determinable
- Conclusions:
- Granulometry cannot be determined due to the hygroscopic nature of the substance.
- Executive summary:
A statement was performed to conclude on the granulometry of the test item.
The substance was assessed according to recognized guidelines (OECD 110, ISO 13320, CIPAC MT59 and MT180) and under GLP.
The test item is hygroscopic; therefore, because of moisture, the particles are sticked together. Thus, laser diffraction or sieving methods are not applicable.
Referenceopen allclose all
The test item is a hygroscopic powder which forms one large lump and cannot be analysed by laser diffraction due to the moisture in the test item. In the laser diffraction analysis, a dispersing solvent (e.g. acetone or sunflower oil) is used and the moisture droplets formed in this solvent, interfere the measurement of particle size of the crystals. Sieving is not an alternative since the test item sticks to the sieves.
Based on this, it is concluded that it is technically not possible to determine the particle size distribution of this substance in the form in which it was supplied.
Description of key information
Granulometry cannot be determined due to the hygroscopic nature of the substance.
Moreover, the substance will not be marketed as such. Therefore, no further information is considered necessary.
Additional information
A statement was performed to conclude on the granulometry of the test item.
The substance was assessed according to recognized guidelines (OECD 110, ISO 13320, CIPAC MT59 and MT180) and under GLP.
The test item is described as a hygroscopic solid; therefore, because of moisture, the particles are sticked together. Thus, study with laser diffraction or sieving methods is technically not feasible.
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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