Registration Dossier
Registration Dossier
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EC number: 205-553-3 | CAS number: 142-71-2
Density
Administrative data
- Endpoint:
- relative density
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Study conducted in compliance with Good laboratory Practice and internationally accepted guidelines.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 012
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.3 (Relative Density)
- GLP compliance:
- yes
- Type of method:
- pycnometer method
- Remarks:
- gas comparison pycnometer
Test material
- Reference substance name:
- Copper di(acetate)
- EC Number:
- 205-553-3
- EC Name:
- Copper di(acetate)
- Cas Number:
- 142-71-2
- Molecular formula:
- Cu(CO2CH3)2
- IUPAC Name:
- copper di(acetate)
- Test material form:
- solid: crystalline
- Details on test material:
- - Name of test material (as cited in study report): Copper acetate monohydrate
- Test material purity: 99.9 %
- Lot/batch No.: 11.6.1SD
- Storage condition of test material: Room temperature in the dark.
Constituent 1
Results and discussion
Density
- Type:
- relative density
- Density:
- 1.92
- Temp.:
- 21.9 °C
Any other information on results incl. tables
Although testing would be preferable at 20 °C, in the absence of methods of temperature control for the relevant apparatus and the negligible influence of temperature on the density of solids, the method guideline (EC A3) requires that the determination of density of solids is to be performed “at room temperature”.
The mass density of a material varies with temperature and pressure and this variance is typically negligible for solids. Increasing the temperature of a substance may decrease its density by increasing the volume of that substance. Typical thermal expansion coefficients of solids are in the order of 10−5°C−1, and the volumetric expansion of stainless steel (used as calibration spheres) at 20°C is approximately 5.2 x 10-5°C−1. Thus, a change in temperature of several degrees will have no significant effect on the volume and hence the density of a solid substance.
Thus, it is considered that the effect of temperature within normal laboratory conditions will not have a significant impact on either the determined density or calculated relative density.
Applicant's summary and conclusion
- Conclusions:
- The density of copper acetate has been determined to be 1.92 at 21.9 ± 0.5 °C.
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