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Physical & Chemical properties

Water solubility

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Reference
Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
15 June 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: The study was well conducted according to guidelines and critical micelle concentration (CMC) method is used as an alternative to the water solubility.
Qualifier:
according to
Guideline:
other: DIN 53914 determining the surface tension of surfactants
Principles of method if other than guideline:
For surface active substances the critical micelle concentration (CMC) method is used as an alternative to the water solubility. The critical micelle concentration (CMC) is determined by measuring the surface tension of test substance solutions at different test substance concentration. For surface active substances which form micelles in solution, the surface tension decreases with increasing concentration until the CMC is reached. At concentrations above the CMC, the surface tension remains constant. The CMC is determined from a plot of the surface tension versus the logarithm of the test substance concentration.

GLP compliance:
no
Type of method:
other: critical micelle concentration (CMC)
Specific details on test material used for the study:
- Name of test material (as cited in study report): Quaternary ammonium compounds, (C16-18 and C18-unsatd. alkyl) trimethyl, chlorides (Pure)
- Physical state: light amber paste
- Composition of test material, percentage of components: refer attached background material
- Lot/batch No.: 111207JB
- Expiry date: 07-12-2021
- Date of production: 07-12-2011


Key result
Water solubility:
0.14 g/L
Temp.:
25 °C
pH:
7
Remarks on result:
other: critical micelle concentration (CMC)
Conclusions:
Under the conditions of the study, the water solubility (critical micelle concentration) of the test substance was determined to be 0.14 g/L or 140 mg/L at 25°C (moderately soluble).

Executive summary:

The water solubility was determined using a guideline based on critical micelle concentration (CMC). Under the conditions of the study, the water solubility (critical micelle concentration) of the test substance was determined to be 0.14 g/L or 140 mg/L at 25°C.

Description of key information

The water solubility was determined using a guideline based on critical micelle concentration (CMC) (Börjesson, 2012).

Key value for chemical safety assessment

Water solubility:
0.14 g/L
at the temperature of:
25 °C

Additional information