2-Propenoic acid, 2-methyl-, tetracosyl ester, branched

Explosiveness

Link to relevant study record(s)

Reference

Endpoint:

explosive properties of explosives

Type of information:

other: expert assessment

Adequacy of study:

key study

Study period:

2018

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: An assessment was performed based on an examination of the functionality within the substance.

Qualifier:

no guideline required

Principles of method if other than guideline:

An assessment was performed based on an examination of the functionality within the substance.

GLP compliance:

no

Parameter:

other: not applicable

Remarks on result:

other: see 'other information on results'

According to the CLP Regulation (EC) No 1271/2008, Section 2.1.1.2., 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.

A screening procedure has been used to assess the explosive properties of 2-propenoic acid, 2-methyl-, tetracosyl ester (branched). The following has been taken into consideration:

1) Annex VII of the REACH regulation ((EC) No 1907/2006), section 7.11, which states that a study of the explosive properties of a substance need not be conducted if ‘there are no chemical groups associated with explosive properties present within the molecule’.

2) Section 2.1.4.3. of the CLP regulation covering explosive properties states that a substance or mixture shall not be classified as explosive if:

a) There are no chemical groups associated with explosive properties present in the molecule. Example of groups which may indicate explosive properties are given in Table A6.1 in Appendix 6 of the UN Recommendations on the Transport of Dangerous Goods, Manual of Test and Criteria; 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.

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

i) Less than 15% by mass, if the oxidising substance is assigned to Categories 1 or 2;

ii) Less than 30% by mass, if the oxidising substance is assigned to Category 3.

An evaluation of the functionality within the substance has been performed to identify the presence of elements commonly associated with explosive properties as described in Table A6.1 in Appendix 6 of the UN Recommendations on the Transport of Dangerous Goods, Manual of Test and Criteria.

Functional group (examples)	Comments/conclusions
C-C unsaturation (acetylenes, acetylides, 1,2-dienes)	Many of the constituents contain unsaturated carbon bonds – however these are not of the type typically associated with explosive behaviour.
C-Metal and N-Metal (Grignard reagents, organo-lithium compounds)	Not present
Contiguous N atoms (azides, aliphatic azo compounds, diazonium salts, hydrazines)	Not present
Contiguous O atoms (peroxides, ozonides)	Not present
N-O (hydroxylamines, nitrates, nitro compounds, nitroso compounds, N-oxides)	Not present
N-Halogen(chloramines, fluoroamines)	Not present
O-Halogen (chlorates, perchlorates)	Not present

The raw materials used to manufacture the substance do not contain any halogens, nitrogen, or metals, and these elements are not present in the final product. Oxygen is present within 2-propenoic acid, 2-methyl-, tetracosyl ester (branched), however it is not contained within a chemical group considered to be associated with explosive properties, as stated in section 2.1.4.3. of the CLP regulation.

Interpretation of results:

GHS criteria not met

Conclusions:

2-Propenoic acid, 2-methyl-, tetracosyl ester(branched) does not have explosive properties and does not require classification for explosive properties.

Executive summary:

2-Propenoic acid, 2-methyl-, tetracosyl ester(branched) has been assessed for explosive properties. The assessment is based on an examination of the functionality within the substance. It was concluded that 2-Propenoic acid, 2-methyl-, tetracosyl ester(branched) has a calculated oxygen balance of less than – 200, does not have explosive properties and does not require classification for explosive properties.

Description of key information

2-Propenoic acid, 2-methyl-, tetracosyl ester(branched) has been assessed for explosive properties. The assessment is based on an examination of the functionality within the substance. It was concluded that 2-Propenoic acid, 2-methyl-, tetracosyl ester(branched) does not have explosive properties and does not require classification for explosive properties.

Key value for chemical safety assessment

Explosiveness:

non explosive