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Water solubility

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Reference
Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 105 (Water Solubility)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
flask method
Specific details on test material used for the study:
EC name: Tert-pentyl peroxypivalate
Trade name: Trigonox 125-C75
CAS: 29240-17-3
Batch/Lot no.: 1205442102
Purity: 71.4 %
Appearance: Clear colorless liquid
Expiry date: January 1, 2017
Storage: Approx. -25 °C
Key result
Water solubility:
504 mg/L
Conc. based on:
test mat.
Loading of aqueous phase:
2 g/L
Incubation duration:
72 h
Temp.:
20 °C
pH:
7

Results definitive test Concentration
















































Time



I



II



Average



Difference



h



mg/L



mg/L



mg/L



%



24



518



525



521



 



48



514



489



501



-3.8*



72



475



502



488



-2.6*



Average



 



 



504



 



* Difference in average concentration between two consecutive time points

Conclusions:
The water solubility of the test item was determined to be 504 mg/L at pH 7 at 20 °C.
Executive summary:

The water solubility of tert-pentyl peroxypivalate was determined according to OECD guideline 105 at a temperature of 20 °C. The data on water solubility represent the saturation mass concentration of the test substance in water. In the definitive test the determined result for water solubility of the test substance was an average value for the three time points 24, 48 and 72 hours. The average result was calculated to be 504 mg/L. The pH value of the test solution at the different time points was measured to be 7. The temperature during the test varied between 19.6 and 20.2 °C.

Description of key information

The water solubility of the test item was determined to be 504 mg/L at pH 7 at 20 °C.

Key value for chemical safety assessment

Water solubility:
504 mg/L
at the temperature of:
20 °C

Additional information

The water solubility of tert-pentyl peroxypivalate was determined according to OECD guideline 105 at a temperature of 20 °C. The data on water solubility represent the saturation mass concentration of the test substance in water. In the definitive test the determined result for water solubility of the test substance was an average value for the three time points 24, 48 and 72 hours. The average result was calculated to be 504 mg/L. The pH value of the test solution at the different time points was measured to be 7. The temperature during the test varied between 19.6 and 20.2 °C.