Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 238-735-6 | CAS number: 14691-80-6
Density
Administrative data
Link to relevant study record(s)
- Endpoint:
- relative density
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.3 (Relative Density)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 109 (Density of Liquids and Solids)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Date of Inspection: 19-21/07/2011, Signed 31/08/2011 (MHRA)
- Type of method:
- air comparison pycnometer (for solids)
- Remarks:
- referred to as a 'gas comparison pyconometer' in the study report.
- Type:
- relative density
- Density:
- 2.45
- Temp.:
- 21.5 °C
- Conclusions:
- The relative density of trisodium hydrogen diphosphate was determined to be 2.45 at 21.5 ± 0.5 ºC.
This study is considered to be appropriate and reliable for use as a key study in accordance with Regulation (EC) No. 1907/2006(REACH). No further testing is required.
Reference
RESULTS
Calibration
The pressure readings and the calculated volume for the reference and sample cells are shown in the following table:
Table 2.
Determination |
P1 |
P2 |
P3 |
P4 |
Reference Cell Volume (cm3) |
Sample Cell Volume (cm3) |
1 |
17.168 |
6.496 |
17.786 |
8.807 |
90.737 |
149.068 |
2 |
17.693 |
6.696 |
17.819 |
8.824 |
90.793 |
149.111 |
3 |
17.695 |
6.679 |
17.829 |
8.821 |
90.041 |
148.509 |
Sample
The pressure readings, calculated volumes and density values obtained for the test item are shown in the following table:
Table 3.
Determination |
Test |
P1 |
P2 |
Volume (cm3) |
Density (kg/m3) |
Mean Density (kg/m3) |
1 |
A |
17.741 |
7.318 |
19.964 |
2.45 x 103 |
2.45 x 103 |
B |
17.713 |
7.307 |
19.980 |
2.45 x 103 |
||
C |
17.855 |
7.365 |
19.963 |
2.46 x 103 |
||
2 |
A |
17.870 |
7.422 |
21.465 |
2.43 x 103 |
2.45 x 103 |
B |
17.295 |
7.180 |
21.369 |
2.45 x 103 |
||
C |
17.168 |
7.126 |
21.330 |
2.45 x 103 |
Temperature: 21.5 ± 0.5 ºC
Mean density: 2.45 x 103kg/m3
Relative density: 2.45
Duplicate determinations were performed to ensure a reproducibility of less than ± 0.02 g/cm3 was obtained.
Description of key information
One key study exists. This study (Woolley A, 2012) was conclusive, done to a valid guideline (EU Method A.3) and the study was conducted under GLP conditions. It is therefore scientifically justified for use as a key study under Regulation (EC) No. 1907/2006.
Key value for chemical safety assessment
Additional information
The relative density of the test item has been determined to be 2.45 at 21.5 ± 0.5°C.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
