Registration Dossier
Registration Dossier
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EC number: 202-327-6 | CAS number: 94-36-0
Water solubility
Administrative data
Link to relevant study record(s)
Description of key information
A study was performed to determine the water solubility of Dibenzoyl peroxide. The method followed is amongst those described in Council Regulation (EC) No. 440/2008 (Method A6) and the OECD Guidelines for the Testing of Chemicals (Method 105).
The water solubility of Dibenzoyl peroxide was found to be 0.35 mg/l at 20ºC. The pH values of the samples ranged from 6.7 to 7.2.
Key value for chemical safety assessment
- Water solubility:
- 0.35 mg/L
- at the temperature of:
- 20 °C
Additional information
Several data were available in handbooks concerning the water solubility of Dibenzoyl peroxyde. However, none of this data can be considered as sufficiently detailed and so relevant:
Handbook1: The three documents quoted in this endpoint indicate that the substance is slighltly soluble in water (0.1 - 100 mg/L). Nevertheless, no information concerning material and methods are given in order to challenge the reliability of these data.
Handbook2: The two documents quoted here indicate that the substance is insoluble in water (< 0.1 mg/L). Nevertheless, no information concerning material and methods are given in order to challenge the reliability of these data.
Handbook3: The water solubility of dibenzoyl peroxide was estimated at 9.1 mg/L. Nevertheless, no information are given in order to challenge the reliability of this data. Moreover, based upon scientific knowledge of the substance, this data is considered as invalid because the substance is known to be be very slightly soluble.
As a consequence, a study was performed to determine the water solubility of Dibenzoyl peroxide. The method followed is amongst those described in Council Regulation (EC) No. 440/2008 (Method A6) and the OECD Guidelines for the Testing of Chemicals (Method 105).
The water solubility of Dibenzoyl peroxide was found to be 0.35 mg/l at 20ºC. The pH values of the samples ranged from 6.7 to 7.2. So, Dibenzoyl peroxyde is considered as slightly soluble in water (0.1 - 100 mg/l). However, this data has to be handled with care due to the rapid kinetics of the abiotic degradation of dibenzoyl peroxide. The water solubility of benzoic acid was estimated at 2.9 g/l at 20°C.
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