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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Explosiveness

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Administrative data

Link to relevant study record(s)

Description of key information

Waiving

Key value for chemical safety assessment

Explosiveness:
non explosive

Additional information

The test does not neeed to be conducted based on the thermal behaviour.

Justification for classification or non-classification

An explosive substance or mixture is a solid or liquid substance or mixture of substances which is in itself capable by chemical reaction of producing gas at such a temperature and pressure and at such a speed as to cause damage to the surroundings.

For explosives of divisions 1.1 to 1.6, a core set of tests that need to be performed, but they can be waived.

According to the CLP Regulation 1272/2008/EC, 2.1.4.2 section, a screening procedures aimed at identifying the presence of such reactive groups and the potential for rapid energy release.

A substance shall not be classified as explosive if (2.1.4.3.section of CLP):

(a) There are no chemical groups associated with explosive properties present in the molecule, or

(b) The substance contains chemical groups associated with explosive properties which include oxygen and the calculated oxygen balance is less than - 200;

(c) When the organic substance or a homogenous mixture of organic substances contains chemical groups associated with explosive properties but the exothermic decomposition energy is less than 500 J/g and the onset of exothermic decomposition is below 500 °C. The exothermic decomposition energy can be determined using a suitable calorimetric technique; or

(d) For mixtures of inorganic oxidising substances with organic material(s), the concentration of the

inorganic oxidising substance is:

-    less than 15 % by mass, if the oxidising substance is assigned to Categories 1 or 2;

-    less than 30 % by mass, if the oxidising substance is assigned to Category 3.

Azo compounds contains Chemical groups associated with explosive properties indicated in Table R.7.1-28 of ECHA Guidance and the substance does not have the calculated oxygen balance less than – 200, the exothermic decomposition energy is less than 500 J/g and the onset of exothermic decomposition is below 500 °C.

The onset reported on DSC is 205.3 °C, enthalpy 62.6 J/g therfore the substance does not need to be performed.