Registration Dossier
Registration Dossier
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EC number: 269-054-2 | CAS number: 68186-92-5 This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 77896.
Density
Administrative data
Link to relevant study record(s)
- Endpoint:
- density, other
- Remarks:
- density and relative density
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 109 (Density of Liquids and Solids)
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EU Method A.3 (Relative Density)
- Principles of method if other than guideline:
- The true density of the sample was determined using a helium stereopycnometer. The technique is based on the determination of the true volume that the powder occupies by means of the difference between the cell volume and the volume that the helium occupies that is introduced to complete the cell filling. True density is calculated taking into account the mass of the powder used. The cell used for the density determination was the so-called Large cell, with a volume of 135 cm³.
The sample was dried in a laboratory oven at a temperature of 110 °C for at least two hours and then placed in a desiccator, before testing, to reach room temperature.
Before proceeding with the sample density measurement, the proper functioning of the instrument was verified using micronized zirconium oxide as standard, which allows measurement traceability to be assured. - GLP compliance:
- no
- Remarks:
- : lab has ISO 17025 accreditation
- Type of method:
- air comparison pycnometer (for solids)
- Type:
- density
- Density:
- 4.8 g/cm³
- Temp.:
- 20 °C
- Remarks on result:
- other: relative density D20/4 = 4.8
- Conclusions:
- The relative density D20/4 of the sample is 4.8.
Reference
In order to calculate sample relative density D204, the value of the density of water at 4 °C was looked up in the literature, this being 0.999975 g/cm³ according to the handbook of Chemistry and Physics. If it is assumed that sample density at 20 °C does not differ more than the own measurement error, this value is calculated from the quotient between the value of sample density at 20 °C and the value of water density at 4 °C, both expressed in the same units.
Description of key information
The relative density of chrome tungsten titanium buff rutile at 20 °C is 4.8 in comparision to the density of water at 4 °C.
Key value for chemical safety assessment
- Relative density at 20C:
- 4.8
Additional information
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