Sodium chlorate

Explosiveness

Link to relevant study record(s)

Reference

Endpoint:

explosive properties of explosives

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2004

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Justification for type of information:

Study was carried out according to generally valid and internationally accepted testing guidelines and under GLP. Test substance is adequately characterised. Therefore full validation applies.

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

EU Method A.14 (Explosive properties)

Version / remarks:

1992

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

Inspection date : 15-17 Otober 2001 ; Certificate date : 17 December 2001

Key result

Parameter:

sensitiveness to impact: impact energy (J)

Remarks on result:

not sensitive to impact using an impact energy of 40 J

Remarks:

no explosion at 40 J

Key result

Parameter:

sensitiveness to friction: friction load (N)

Remarks on result:

not sensitive to friction using a friction load of 360 N

Remarks:

negative at 360 N

Key result

Parameter:

thermal sensitivity - Koenen test: diameter of the orifice plate

Remarks on result:

not thermal sensitive if heated under defined confinement

Remarks:

no explosion with orifice of 2 and 6 mm

Thermal sensitivity (effect of a flame):

- orifice 6 mm: no fragments, tube unchanged (all three trials)

- orifice 2 mm: no fragments, tube unchanged (1 trial), wall of tube split (1 trial), wall of tube bulged out (1 trial)

In all trials: no explosion

Mechanical sensitivity (shock):

- 40 J: decomposition occurred (smell of fire was observed), but no signs of explosion

- 7.5 J: six times negative, no explosion

Mechanical sensitivity (friction):

- 360 N; six times negative; sensitivity > 360 N

Interpretation of results:

GHS criteria not met

Conclusions:

The test item has no explosive properties according to Directive 67/548/EEC.

Executive summary:

The explosive properties of test item were determined acccording to EU method A.14 and under GLP.

The test item has no explosive properties under these test conditions.

This means that according to Directive 67/548/EEC, this material is NOT considered as explosive.

This data is considered as a key data.

Description of key information

Not explosive according to Regulation (EC) 1272/2008 (CLP regulation) and UN Globally Harmonised System (GHS).

Key value for chemical safety assessment

Explosiveness:

non explosive

Additional information

In accordance with section 1 of REACh Annex XI, study for explosive properties is deemed unnecessary based on the experience in handling, testing and use of the substance.

In addition, a fully reliable experimental study, conducted according to a recognized EC method and under GLP, is available. Sodium chlorate did not show explosive properties in the A.14 tests. This means that according to Directive 67/548/EEC this material is not considered as explosive.

Moreover DSC conducted on the substance showed no exothermic event till 160°C and the EU A.16 test (TNO, 2004) showed no exothermic effects during the experiment till 400°C.

Note also that Sodium chlorate has a harmonised classification (index No. 017-005-00-9, ATP0)  and it is not classified for explosive properties like in ADR 2019 - UN1495.

Therefore, explosive properties are not anticipated for the registered substance and the acceptance procedure for Class 1 explosives shall not apply. No further testing was considered.

It should be mentioned that this material may become explosive when mixed with combustible materials.

Justification for classification or non-classification

Based on the information indicated above, no classification is needed for explosivity according to Regulation (EC) 1272/2008 (CLP regulation) and UN Globally Harmonised System (GHS).