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EC number: 209-957-0 | CAS number: 598-94-7
Water solubility
Administrative data
Link to relevant study record(s)
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 09.09. - 13.09.2013
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- GLP compliance:
- not specified
- Type of method:
- flask method
- Specific details on test material used for the study:
- - Name of test material (as cited in study report): 1,1-dimethylurea
- Physical state: solid
- Expiration date of the lot/batch: 2015-12 - Key result
- Water solubility:
- 143.7 g/L
- Conc. based on:
- test mat.
- Temp.:
- 20 °C
- pH:
- 9.4
- Conclusions:
- In a study according to OECD 105 the water solubility of 1,1-Dimethylurea was determined to be 143.1 g/L (20 °C, pH 9.4).
- Executive summary:
In a study according to OECD 105 the water solubility of 1,1-Dimethylurea was determined to be 143.1 g/L (20 °C, pH 9.4).
Reference
The result of the preliminary test
Sample weight：0.1025 g
The result of the preliminary test is shown in Table 2.
Table 2 Result of pre-testfor water solubility
No. |
Volume of water added/mL |
Results |
1 |
0.1 |
Not dissolved completely |
2 |
0.5 |
Not dissolved completely |
3 |
1 |
Dissolved completely |
The test result
The test result is shown in Table 3. The mass concentrations of the threecentrifuging solutiongroups are separately1.428E-01 g/mL, 1.446E-01 g/mL and 1.438E-01 g/mL.
Table 3 The result of Water Solubility
No. |
Solution |
Mass taken (g) |
pH at 20oC |
Peak area |
Average value of peak areas |
Factor (f) |
Average Value off |
Mass concentration (g/mL, 20oC) |
|||||||||
1 |
STD1 |
0.04825 |
/ |
52.600 |
/ |
1.0912E+05 |
/ |
/ |
|||||||||
2 |
A |
/ |
9.4 |
158.317 |
158.798 |
/ |
1.1124E+05 |
1.428E-01 |
|||||||||
3 |
159.278 |
||||||||||||||||
4 |
STD2 |
0.02354 |
/ |
26.656 |
/ |
1.1335E+05 |
/ |
/ |
|||||||||
5 |
B |
/ |
9.4 |
161.359 |
160.786 |
/ |
1.1123E+05 |
1.446E-01 |
|||||||||
6 |
160.213 |
||||||||||||||||
7 |
STD1 |
0.04825 |
/ |
52.590 |
/ |
1.0910E+05 |
/ |
/ |
|||||||||
8 |
C |
/ |
9.5 |
159.388 |
159.942 |
/ |
1.1119E+05 |
1.438E-01 |
|||||||||
9 |
160.495 |
||||||||||||||||
10 |
STD2 |
0.02354 |
/ |
26.640 |
/ |
1.1328E+05 |
/ |
/ |
The relative difference of the concentrations measured in the three flasks respectively:
A-B，-1.3 %； A-C，-0.8 %； B-C，0.5 % .
Discussion and evaluation of Test results
According to OECD 105:
- The concentrations measured in the three flasksdid not differ by more than 15% each other, the test was satisfactory and the average value of all results could be calculated as the water solubility.
- The last result of water solubility was the mean of the concentrations measured in the three flasks: [(1.428+1.446+1.438)×10-1/3] g/mL =/L, and pH = 9.4。
Description of key information
In a study according to OECD 105 the water solubility of 1,1-Dimethylurea was determined to be 143.1 g/L (20 °C, pH 9.4).
Key value for chemical safety assessment
- Water solubility:
- 143.7 g/L
- at the temperature of:
- 20 °C
Additional information
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