2-Butanone, peroxide

Flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

flammable gases

Data waiving:

study technically not feasible

Justification for data waiving:

the study does not need to be conducted because the substance is a liquid

Reference 2

Endpoint:

flammable solids

Data waiving:

study technically not feasible

Justification for data waiving:

the study does not need to be conducted because the substance is a liquid

Reference 3

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

Reference 4

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

Description of key information

The classification of organic peroxides into one of the seven categories of “Types A to G” is given in decision logic Figure 2.15.1 of CLP, based on the test series A to H, as described in the Part II of the UN-MTC. The substance is classified as Organic Peroxide Type D, H242.

Key value for chemical safety assessment

Flammability:

not classified

Additional information

Flammability:

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.

 

Flammability in contact with water:

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

 

Pyrophoric properties:

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

 

Self-heating substance

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.

 

Self-reactive substance

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.

Justification for classification or non-classification

Based on the results of the UN-MTC tests (below) and the decision logic, Methylethylketoneperoxide is classified as Organic Peroxide Type D.

 

Phys-chem UN testing	UN test method	Concentration	Evaluation andResults	Reference
Propagation of detonation test series A	A.1,BAM 50/60 steel tube test	<=40%/ <=10%	24 cm, cavitated version, Partial	Company Data/ DATATOP/ UN Test Manual
Propagation of deflagration test series C	C.1, Time/Pressure test	<=40%/ <=10%	5340 ms Yes,slowly	Company Data/ DATATOP/ UN Test Manual
	C.2, Deflagration test	<=40%/ <=10%	<0,35 mm/s No	Company Data/ DATATOP/ UN Test Manual
Effect of heating under defined confinement test series E	E.1, Koenen test	<=40%/ <=10%	< 1,0 mm (A), Low	Company Data/ DATATOP/ UN Test Manual
	E.2, Dutch pressure vessel test	<=40%/ <=10%	1,5 mm, Low	Company Data/ DATATOP/ UN Test Manual
Explosive power test series F	F.3, Trauzl Test	<=40%/ <=10%	not applicable	Company Data/ DATATOP/ UN Test Manual
Self Accelerating Decomposition Temperature (SADT) test series H	H.4, Heat accumulation storage test (400 ml Dewar vessel)	<=40%/ <=10%	>=60°C	Company Data/ DATATOP/ UN Test Manual

 

Based on the study results, the molecular structure and experience in handling and use, the substance is not classified and labelled asflammable in contact with water, pyrophoric, self-reactive substance and self-heating substance according to Directive 67/548/EEC (DSD) and Regulation (EC) No 1272/2008 (CLP).Based on the results of the UN-MTC tests and the decision logic methyl-ethylketone peroxide is classified as Organic Peroxide Type D with H242 (heating may cause a fire) according to Regulation (EC) No 1272/2008 (CLP).