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Water solubility

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water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
OECD Guideline 105 (Water Solubility)
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%
Composition: see CoA
Appearance: Clear colorless liquid
Expiry date: January 1, 2017
Storage: Approx. -25°C
Water solubility:
504 mg/L
Conc. based on:
test mat.
Loading of aqueous phase:
2 g/L
Incubation duration:
72 h
20 °C
Details on results:
Results definitive test
Time I II Average Difference
hr 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
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.
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.

The determined final result for water solubility of the test substance was calculated to be 504 mg/L.

Description of key information

The measured water solubility is 504 mg/L @ 20 oC

Key value for chemical safety assessment

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

Additional information