Registration Dossier
Registration Dossier
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EC number: 444-960-2 | CAS number: 39148-16-8
Additional physico-chemical information
Administrative data
- Endpoint:
- other: hygroscopic behaviour
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 21 Nov - 1 Dec 2000
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Test procedure according to scientific standards
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 001
- Report date:
- 2001
Materials and methods
- Principles of method if other than guideline:
- The kinetic absorption of water is determined by weighing the test item from time to time during a period of 6 hours. The weight increase is calculated
as a percentage of the initial test substance weight. The constant humidity atmosphere is controlled in a desiccator by a known mixture of sulfuric acid/water. - GLP compliance:
- no
Test material
- Reference substance name:
- -
- EC Number:
- 444-960-2
- EC Name:
- -
- Cas Number:
- 39148-16-8
- Molecular formula:
- C2H6O3P.Na
- IUPAC Name:
- sodium ethyl phosphonate
Constituent 1
Results and discussion
- Results:
- No significant absorption of water occurs when the test item was subjected to 20 % relative humidity (RH) atmosphere. Under 55 % RH atmosphere, the weight of the substance increased very quickly of 10 % after 1.5 hours. After 6 hours exposure the weight increase reached 35 % showing deliquescence. For usual conditions of storage and handling, it should be considered that the substance cannot be kept in a solid state.
Any other information on results incl. tables
Summary of the results:
Exposure time [h] |
Test at 20% RH |
Test at 55% RH |
||
Weight [g] |
Weight increase [%] |
Weight [g] |
Weight increase [%] |
|
0 |
0.6180 |
- |
0.7443 |
- |
1.5 |
0.6188 |
0 |
0.8200 |
10 |
3.5 |
0.6250 |
1 |
0.9158 |
23 |
4.5 |
0.6206 |
0 |
0.9558 |
29 |
5.3 |
0.6191 |
0 |
0.9832 |
32 |
6.2 |
0.6191 |
0 |
1.0076 |
35 |
These results demonstrate that the substance is especially sensitive to water absorption under normal conditions of humidity exposure (55% RH).
Applicant's summary and conclusion
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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