Phosphoric acid, C14-15-branched and linear alkyl esters, potassium salts

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: EN 14370:200 (ISO4311-1979)

Deviations:

no

Principles of method if other than guideline:

characterization of cristical micelle concentration

GLP compliance:

no

Type of method:

other: surface tension measurement to determine cristical micelle concentration

Specific details on test material used for the study:

Name: Phosphoric acid, C14-15 branched and linear alkyl esters, potassium salts
CAS No.: 1893414-79-3
Physical state: white solid at 20 °C
Batch No.: PU61810016
Re-certification date of batch: 09 March 2018
Purity: 100 % (UVCB, lyophilized solid, water content 0.85 % (w/w))
Stability: stable under test conditions
Storage condition of test material: Room temperature, protected from light

Key result

Water solubility:

<= 5 113.7 mg/L

Conc. based on:

test mat. (total fraction)

Temp.:

20 °C

Remarks on result:

other: cristical micelle concentration

Details on results:

Experimental Part

The measurement was carried out with KRÜSS Force Tensiometer K100 (Figure1). The Samples were delivered from customer side. The start solution using surfactants were made with a concentration of
29317.2 mg/l. Each 20ml of the sample solutions was placed in the sample vessel. Constant quantities of pure water (demineralised) have been added stepwise to the sample by means of a double dosing unit. Values of
the surface tension at different concentrations were detected. Based on these values obtained in dependence on concentration regression function, included in the Software was performed for each concentration investigated.

All measurements were performed at temperature T= 20.0° C ± 1.0° C. Following measuring parameters were:

Detection speed: = 10mm/min
Detection sensitivity: = 1 mg
Search Speed: = 2 mm/min
Search sensitivity = 1 mg
Values for mean: = 5
Standard deviation: = 0.1 mN/m
Dosing: = exponentially
Number of dosing steps = 45

Results

Sample	Experiment	CMC [mg/l]
test item	1	5103.280
test item	2	5124.181
test item	mean value	5113.731

Conclusions:

The critical micelle concentration of the test item is measuerd according to EN 14370:200 (ISO4311-1979) at 5113.7 mg/l (20 °C).

Executive summary:

T The critical micelle concentration of the test item is measuerd according to EN 14370:200 (ISO4311-1979) at 5113.7 mg/l (20 °C).

Description of key information

The critical micelle concentration of the test item is measuerd according to EN 14370:200 (ISO4311-1979) at 5113.7 mg/l (20 °C).

Key value for chemical safety assessment

Water solubility:

5 113.7 mg/L

at the temperature of:

20 °C