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Physical & Chemical properties

Flammability

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Endpoint:
substances / mixtures which in contact with water emit flammable gases
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because the experience in production or handling shows that the substance does not react with water, e.g. the substance is manufactured with water or washed with water
Interpretation of results:
GHS criteria not met
Endpoint:
flammable solids
Data waiving:
study technically not feasible
Justification for data waiving:
the study does not need to be conducted for organic peroxides
Interpretation of results:
GHS criteria not met
Endpoint:
pyrophoric solids
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because the substance is known to be stable in contact with air at room temperature for prolonged periods of time (days) and hence, the classification procedure does not need to be applied
Interpretation of results:
GHS criteria not met
Endpoint:
self-heating substances / mixtures
Data waiving:
study technically not feasible
Justification for data waiving:
the study does not need to be conducted for organic peroxides
Interpretation of results:
not classified based on GHS criteria

Description of key information

[1,3-phenylenebis(1-methylethylidene)]bis[tert-butyl] peroxide is a peroxide type D and has a SADT of  80 ºC. Flammability is an intrinsic hazard of organic peroxides.

Key value for chemical safety assessment

Flammability:
flammable

Additional information

The flammability determination of [1,3-Phenylenebis(1-methylethylidene)]bis[tert-butyl]peroxide has been waived according to the ECHA Guidance on the application of CLP criteria.

Test A12: water reactivity:        

Based on the molecular structure as well as experience in handling and use shows that the substance has no water reactive properties.      

Test A13: pyrophoric properties:          

Based on the molecular structure as well as experience in handling and use shows that the substance has no pyrophoric properties.

According to Guidance on information requirements and chemical safety assessment, R7a, Endpoint specific guidance, R.7.1.10.4, the UN test series A - H for self-reactive substances and mixtures, do not need to be conducted as the substance is classified as organic peroxide.

According to Guidance on information requirements and chemical safety assessment, R7a, Endpoint specific guidance, R.7.1.10.7, the UN Test method N.4, for self-heating substances and mixtures does not need to be conducted as the substance is classified as organic peroxide.

According to chapter 2.15 of the CLP regulation, organic peroxides are thermally unstable substances or mixtures, which can undergo exothermic self-accelerating decomposition. In addition, they can have one or more of the following properties:

(i) be liable to explosive decomposition;

(ii) burn rapidly;

(iii) be sensitive to impact or friction;

(iv) react dangerously with other substances.

An organic peroxide is regarded as possessing explosive properties when in laboratory testing the mixture (formulation) is liable to detonate, to deflagrate rapidly or to show a violent effect when heated under confinement.

The classification of an organic peroxide in one of the seven categories “Types A to G” is dependent on its detonation, thermal explosion and deflagrating properties, its response to heating and the concentration

 

Justification for classification or non-classification

Based on the results of the UN-MTC tests (below) and the decision logic, [1,3(or 1,4)-phenylenebis(1-methylethylidene)]bis[tert-butyl] peroxide

is classified as a peroxide type D.

[1,3(or 1,4)-Phenylenebis(1-methylethylidene)]bis[tert-butyl] peroxide is tested below. Since the data below are not influenced by the difference in isomeric structure this outcome is the same as for the substance submitted in this dossier,Cas number: 2212-81-9 [1,3-phenylenebis(1-methylethylidene)]bis[tert-butyl] peroxide.

So: [1,3-phenylenebis(1-methylethylidene)]bis[tert-butyl] peroxide is a peroxide type D and has a SADT of  80 ºC.

Substance name

CAS

Trade name

Leads max. concentration

Leader

 

[1,3(or1,4)-phenylenebis(1-methylethylidene)]bis[tert-butyl] peroxide

25155-25-3

Perkadox 14

100%

AkzoNobel

Phys-chem UN testing

UN test method

Concentration

Evaluation and Results

Reference*

 

 

Propagation of detonation test series A

A.2,TNO 50/70 steel tube test

100%

16-17 cm, No

 

 

 

Propagation of deflagration test series C

C.1, Time/Pressure test

100%

1548 ms, Yes slowly

 

 

C.2, Deflagration test

100%

0.0 mm/s, No

 

Effect of heating under defined confinement test series E

E.1, Koenen test

100%

<1.0 mm (A), Low

 

 

E.2, Dutch pressure vessel test

100%

7.0 mm (10 g), Medium

 

 

 

Explosive power test series F

F.3, Trauzl Test

100%

Not needed for Type D

 

 

 

Self Accelerating Decompostion Temperature (SADT) test series H

H.4, Heat accumulation storage test (400 ml Dewar vessel)

100%

80 ºC

 

*All Data are Company Data/ DATATOP/ UN Test Manual

Organic Peroxide, Type D, Solid, 3106