Registration Dossier

Diss Factsheets

Classification & Labelling & PBT assessment

PBT assessment

Currently viewing:

Administrative data

PBT assessment: overall result

Referenceopen allclose all

Name:
bis(4-methylbenzoyl) peroxide
Type of composition:
boundary composition of the substance
State / form:
solid: particulate/powder
Reference substance:
bis(4-methylbenzoyl) peroxide
Name:
bis(4-methylbenzoyl) peroxide
Type of composition:
legal entity composition of the substance
State / form:
solid: particulate/powder
Reference substance:
bis(4-methylbenzoyl) peroxide
PBT status:
the substance is not PBT / vPvB
Justification:

In a ready biodegradability test is shown that the substance is readily biodegradable and therefore not P or vP.

The substance itself has a log Kow of 4.7, but due to fast hydrolysis p-toluic acid the main degradation product should be evaluated which has a log Kow of 2.44. The substance should therefore not be classified as B or vB.

The lowest EC50 for p-toluic acid is 42 mg/L for invertebrates. The long-term study for invertebrates gave a NOEC of 3.2 mg/L. Both values are above the limits set and p-toluic acid as well as bis(4-methylbenzoyl) peroxide should not be classified T.

The substance does not fulfil any of the screening criteria for either PBT or vPvB and is therefore not classified as such.