N,N'-(ethoxymethylsilylene)bis[N-methylbenzamide]

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

March 27, 2017 - March 31, 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

flask method

Specific details on test material used for the study:

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: room temperature.

Key result

Water solubility:

ca. 35.864 g/L

Conc. based on:

test mat.

Incubation duration:

>= 1 - <= 3 d

Temp.:

20 °C

pH:

>= 2.23 - <= 2.24

In the test, the following flasks were used:

Flasks 1 (samples 1 & 2) – for one day at 30ºC;

Flasks 2 (samples 3 & 4) – for two days at 30ºC;

Flask 3 (samples 5 & 6) – for three days at 30ºC.

The individual results from each of three flasks, which should not differ by more than 15%, are averaged. If the concentrations measured in at least the two last samples do not differ by more than 15% the test is satisfactory.

Water solubility is expressed in mass of solute per volume of solution.

Table 1. Results of the preliminary test

0.1g in x mL of solution	0.1	0.5	1	2	10
Soluble (+/-)	-	-	-	-	+
Approximate solubility, g/L	> 1000	1000 to 200	200 to 100	100 to 50	50 to 10

                                 x – water of pH 5.6 

 

Table 2: Calibration solution

Day	Weight [mg]	Dilution [mL]	Cw [mg/mL]	Peak area		Average peak area Aw	f	Average f
1	29.35	25-0.9-25-3-10	0,01078	631743	631206	631474,5	0.0000171	0.00001731
		25-0.9-25-5-10	0,01796	1031604	1013930	1022767	0.0000176
2		25-0.9-25-2-10	0,00718	416655	420655	418655	0.0000172	0.00001717
		25-0.9-25-4-10	0,01437	836136	837064	836600	0.0000172
3		25-0.9-25-3-10	0,01078	631293	631206	418655	0.0000171	0.00001709
		25-0.9-25-4-10	0,01437	842141	837181	836600	0.0000171

 

 

 

Table 3: Study solution in water

Sample day/ flask		Weight of the sample [mg]	Dilution [mL]	Cp [mg/mL]	Peak area		Average peak area Ap	X [g/kg]
1	1	198.95	25-1-25	0.31832	638184	632191	635187.5	34.5503
	2	197.80		0.31648	692855	696782	694818.5	38.0136
2	3	198.95	25-1-25	0.31832	673767	679972	676869.5	36.5080
	4	198.55		0.31768	645816	647886	646851	34.9592
3	5	199.90	25-1-25	0.31984	676891	675701	676296	36.1370
	6	198.65		0.31784	641299	661180	651239.5	35.0171

 

 

Table 4. Results ofN,N'-(ethoxymethylsilylene)bis[N-methylbenzamide]solubility

in water

Mixing timeat 30 ºC [days, flasks]	1		2		3
Samples	1	2	3	4	5	6
Temperature, ºC	20.0		20.1		20.1
pH	2.24		2.23		2.23
Concentration ofN,N'-(ethoxymethylsilylene)bis[N-methylbenzamide], g/kg	34.5503	38.0136	36.5080	34.9592	36.1370	35.0171
Averageconcentration ofN,N'-(ethoxymethylsilylene)bis[N-methylbenzamide],g/kg	36.2820 ± 2.449		35.7336 ± 1.095		35.5771 ± 0.792
Averageconcentrationof N,N'-(ethoxymethylsilylene)bis[N-methylbenzamide], g/kg	35.8642 ± 0.370

The solubility of N,N'-(ethoxymethylsilylene)bis[N-methylbenzamide] in water is 36.1209 g/kg. The density of this solution is about 1kg/L (about water density). After recalculation:

 

The solubility of N,N'-(ethoxymethylsilylene)bis[N-methylbenzamide] in water

at 20 ± 0.5^oC is 35.8642 g/L

Conclusions:

The solubility of the test item at 20 ± 0.5 ºC and at pH ranging from 2.23 to 2.24 is 35.8642 g/L.

Executive summary:

The study of the determination of test item solubility in water at one pH value using shake flask method was performed according to OECD 106 and EU method A.6, following GLP. The test item content in obtained samples for study of the solubility in the water values was determined by HPLC method, using a liquid chromatograph Shimadzu. The solubility of the test item at 20 ± 0.5 ºC and at pH ranging from 2.23 to 2.24 is 35.8642 g/L.

Description of key information

Key study: OECD 105 and EU method A.6. GLP study. The solubility of the test item at 20± 0.5 ºC and at pH ranging from 2.23 to 2.24 is 35.8642 g/L.

Key value for chemical safety assessment

Water solubility:

35.864 g/L

at the temperature of:

20 °C

Additional information

Key study: The study of the determination of test item solubility in water at one pH value using shake flask method was performed according to OECD 106 and EU method A.6, following GLP. The test item content in obtained samples for study of the solubility in the water values was determined by HPLC method, using a liquid chromatograph Shimadzu. The solubility of the test item at 20± 0.5 ºC and at pH ranging from 2.23 to 2.24 is 35.8642 g/L.