3-(Hydroxymethyl)-1-pentene

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

31.08.-10.11.2006

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)

Version / remarks:

92/69/EEC

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

flask method

Key result

Water solubility:

23.8 g/L

Conc. based on:

test mat.

Temp.:

25 °C

Remarks on result:

other: pH was not determined.

Preliminary Visual Estimation of the Water Solubility

Amounts of the test item and water were stirred at room temperature until the mixture appeared dissolved or the water solubility could be estimated to be below 10 mg/I.

 

Table 1: Appearance of the test mixtures

Amount of test item in mg	Total volume in ml	Appearance of mixture
97.1	0.1	undissolved
97.1	0.5	Undissolved
97.1	1.0	Undissolved
97.1	2.0	Undissolved
97.1	10.0	dissolved

 

According to the preliminary test the solubility of the test item in water is between 9.71 g/I and 48.5 g/I (without correction of the purity). Therefore the water solubility had to be determined by the "flask method".

 

Flask method

 

Table 2: Water solubility of the test item - experiments A to D

Experiment	A	B	C	D
Amount of test item	12.61	12.58	12.44	--
Stirring time at 30 °C	24	48	72	72
pH at 25°C	4.5	4.4	4.5	6.7
Aliquot of the flasks (ml)	0.1	0.1	0.1	0.1
End volume (ml)	20	10	10	10
Measured concentration (mg/l)	236.1/235.4	238.5/238.4	240.8/241.2	--
Mean concentration (mg/l)	235.8	238.5	241.0	--
Water solubility	23.6	23.9	24.1	--

 

Average experiments A to C {without correction for the purity}: 23.8 g/I

Standard deviation:                                                                         0.3 g/I

Relative standard deviation:                                                           1.1 %

 

The water solubility of the test item increases from flask A to C about 0.5 g/1. Due to the low relative standard deviation, this increase is not related to an increasing tendency of the water solubility according to consolidated version of Guideline 67/548/EEC Annex V (Council Directive 92/69/EEC) method A.6. Therefore the test has not been repeated.

 

Table 3: Concentrations of standards for recheck:

Standard	Measured concentration (mg/l)	% Recovery (mean value)
Standard C (c = 651.3 moll)	650.1 / 665.5	101.0
Standard G (c = 217.1 mq/I)	221.4 / 221.4	102.0

 

Recoveries of the 'Recheck sample' ranged from 101.0 % to 102.0 %, indicating a good accuracy of the analytical method.

Conclusions:

The water solubility cs of the test item at a temperature of 20°C was determined according to the flask method. It was found to be: cs = 23.8 mg/l.

Executive summary:

The water solubility was determined according to OECD 105 using the column elution method. The preliminary test showed that the water solubility of the test item is between 9.71g/l and 48.5 gl/l. Therefore the flask method was used showing a solubility of cs 23.8 g/l.

Description of key information

The water solubility cs of the test item at a temperature of 20°C was determined according to the flask method. It was found to be: cs = 23.8 mg/l

Key value for chemical safety assessment

Water solubility:

23.8 g/L

at the temperature of:

20 °C

Additional information

The water solubility was determined according to OECD 105 using the column elution method. The preliminary test showed that the water solubility of the test item is between 9.71g/l and 48.5 gl/l. Therefore the flask method was used showing a solubility of cs 23.8 g/l