Registration Dossier
Registration Dossier
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EC number: 222-340-0 | CAS number: 3437-84-1
Density
Administrative data
Link to relevant study record(s)
- Endpoint:
- relative density
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- October 2011 – July 2012
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Well conducted study, under Internal management system, according to OECD and EC guidelines, certificates of analysis included in the report.
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.3 (Relative Density)
- Version / remarks:
- , May 31, 2008
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 109 (Density of Liquids and Solids)
- Version / remarks:
- Adopted July 27, 1995
- Deviations:
- no
- GLP compliance:
- no
- Remarks:
- Internal management system
- Type of method:
- oscillating densitimeter
- Type:
- relative density
- Density:
- 0.975
- Temp.:
- 20 °C
- measurement 1: 0.9981 g/cm3
- measurement 2: 0.9981 g/cm3
- measurement 3: 0.9980 g/cm3
- measurement 1: 0.9981 g/cm3
- measurement 2: 0.9981 g/cm3
- measurement 3: 0.9980 g/cm3
- Conclusions:
- The relative density of Bisisobutyryl peroxide at 20°C is 0.9752.
- Executive summary:
The relative density of Bisisobutyryl peroxide was calculated from density studies of two diluted formulations of this substance and of the solvent used in these formulations. The study had to be carried out in this way, because Bisisobutyryl peroxide cannot be handled safely in its pure form.
The relative density of the three test substances was determined according toEC Regulation No 440/2008, Guideline A.3 and according to OECD Guideline 109 , and in accordance with European Chemicals Agency (ECHA), Guidance on information requirements and chemical safety assessment, Chapter R.7a, Endpoint specific guidance, May 2008.
The relative density of Bisisobutyryl peroxide at 20°C is 0.9752.
Reference
Calibration and validity verification
The calibration was carried out on August 16, 2010.
The measured density of the calibration liquids at 20°C is mentioned in table below. Also the deviation from the literature values is mentioned. The mean value for the calibration liquids agrees within ± 0.002 g/cm3(accuracy range) with the literature values.
Table measured density of calibration liquids at 20°C
Calibration liquid |
Measurement |
Density [g/cm3] |
Mean density value [g/cm3] |
Deviation from literature value [g/cm3] |
Demineralized water |
1 |
0.9982 |
0.9982± 0.0000 |
0.0000 |
2 |
0.9982 |
|||
3 |
0.9982 |
|||
Ethanol |
1 |
0.7897 |
0.7896± 0.0001 |
0.0003 |
2 |
0.7896 |
|||
3 |
0.7896 |
|||
4 |
0.7896 |
|||
Dichloro-methane |
1 |
1.3244 |
1.3248± 0.0004 |
0.0018 |
2 |
1.3251 |
|||
3 |
1.3252 |
|||
4 |
1.3246 |
The validity of the method was verified prior to the measurements with the test substances using demineralized water.
Measured density of water at 20°C (determined just before the measurement with Trigonox 187-C40):
Measured density of water at 20°C (determined just before the measurement with Trigonox 187-C70 and with isododecane):
Test substances
The measured density of the test substances at 20°C
Test substance |
Measurement |
Density [g/cm3] |
Mean density value [g/cm3] |
Date of test |
Trigonox 187-C40 (content: 37.7%) |
1 |
0.8300 |
0.8301 ± 0.0001 |
10/31/2011
|
2 |
0.8302 |
|||
3 |
0.8300 |
|||
Trigonox 187-C70 (content: 71.3%) |
1 |
0.9115 |
0.9111 ± 0.0004 |
07/24/2012 |
2 |
0.9112 |
|||
3 |
0.9107 |
|||
Isododecane |
1 |
0.7478 |
0.7479 ± 0.0002 |
07/24/2012
|
2 |
0.7481 |
|||
3 |
0.7478 |
|||
4 |
0.7478 |
Relative density of Bisisobutyryl peroxide
The density of Bisisobutyryl peroxide is calculated from the measured values of the three test substances. This is done by fitting the measured data of table above and calculate the value for Bisisobutyryl peroxide in its pure form by linear extrapolation.
The linear fit result in the next density equation with a regression coefficient of 0.9992.
D = 0.7466 + 0.002286C
With:
D = density [g/cm3]
C = concentration of Bisisobutyryl peroxide [%]
The density of 100% Bisisobutyryl peroxide calculated from this equation is 0.9752 g/cm3. The linear fit gives a high regression coefficient. So, the calculated density is a reliable value.
The relative density of Bisisobutyryl peroxide at 20°C is 0.9752.
Description of key information
The relative density of pure Bisisobutyryl peroxide at 20°C is 0.9752.
Key value for chemical safety assessment
- Relative density at 20C:
- 0.975
Additional information
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