See remarks 1) and 3) in sub-section 2.2.52.4:

1) Diluent type B may always be replaced by diluent type A. The boiling point of diluent type B shall be at least 60 °C higher than the SADT of the organic peroxide.

Note: This remark applies only to the carriage of organic peroxides in packagings.

3) "EXPLOSIVE" subsidiary hazard label required (Model No.1, see 5.2.2.2.2).