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Physical & Chemical properties

Water solubility

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Reference
Endpoint:
water solubility
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Study period:
2013
Justification for type of information:
Testing for CAS 55184-72-0 is covered by tests with CAS 848588-96-5. Both substances are very similar since they differ mainly in the share of C13 (CAS 848588-96-5 C13> 80%; CAS 55184-72-0 > 95%). Hence, read across from CAS 848588-96-5 (source) to CAS 55184-72-0 (target) is considered as appropriate for both substances.
Reason / purpose:
read-across source
Key result
Water solubility:
> 170 g/L
Temp.:
20 °C
pH:
>= 6.35 - <= 6.57

The concentrations of the different test solutions were calculated automatically using the equation of the calibration curve and considering the dilution factor 500 of the test solutions. The results are listed in the following table:

 

  

Nominal saturation concentration (mg/L)

Water solubility, Results (mg/L)

457.9

347.0

748.8

562.5

1518.5

1449

 

 

  Thus, the water solubility of the test item Sodium bis (C11-14-isoalkyl, C13-rich) sulfosuccinate depends on the nominal saturation concentration.

 

In a second test, the following aliquots of Sodium bis (C11-14-isoalkyl, C13-rich) sulfosuccinate were added to 10 mL of water and stirred slowly for 1 hour:

 

Aliquot

Weighed sample (g)

A

1.02 - cloudy solution, highly viscous

B

1.03 - pasty

2.05 g

 

 

While being added to the water, cloudy solutions with increasing viscosity were being formed, resulting in a pasty gel after the addition of 2.05 g test item to 10 ml water.

With 2.05 g of test item being mixed into 10 mL of water, a pasty gel with a total weight of approximately 12.05 g has been formed. This is equivalent to 17.0 % (w/w) of test item in solution/gel.

 

As the density of the water will significantly increase with addition of the test item, it can be concluded that water solubility is about 170 g/L, resulting in a gel.

 

Due to the fact, that the formation of the gel is a continuous process and no discrete point can be identified at which dissolution in water switches to gelling, the water solubility can be approximated to > 170 g/L.

Testing for CAS 55184-72-0 is covered by tests with CAS 848588-96-5. Both substances are very similar since they differ mainly in the share of C13 (CAS 848588-96-5 C13> 80%; CAS 55184-72-0 > 95%). Hence, read across from CAS 848588-96-5 (source) to CAS 55184-72-0 (target) is considered as appropriate for both substances.

Conclusions:
Interpretation of results (migrated information): very soluble (> 10000 mg/L)
Executive summary:

In the non GLP Klimisch 1 key study from Frischmann (2013), the water solubility of Sodium bis (C11-14-isoalkyl, C13-rich) sulfosuccinate was determined according to OECD 105 and EU method A.6. The water solubility was determined to be >170 g/L at 20°C.

The results of this study are considered relevant and reliable for the risk assessment.

Testing for CAS 55184-72-0 is covered by tests with CAS 848588-96-5. Both substances are very similar since they differ mainly in the share of C13 (CAS 848588-96-5 C13> 80%; CAS 55184-72-0 > 95%). Hence, read across from CAS 848588-96-5 (source) to CAS 55184-72-0 (target) is considered as appropriate for both substances.

Description of key information

water solubility: > 170 g/L

Key value for chemical safety assessment

Water solubility:
170 g/L
at the temperature of:
20 °C

Additional information

In the non GLP Klimisch 1 key study from Frischmann (2013), the water solubility of Sodium bis (C11-14-isoalkyl, C13-rich) sulfosuccinatewas determined according to OECD 105 and EU method A.6. The water solubility was determined to be >170 g/L at 20°C.

The results of this study are considered relevant and reliable for the risk assessment.