Diquat dibromide

Flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

flammable solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

26 Jan 2021 to 03 Feb 2021

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

UN Manual of Tests and Criteria: Test N.1 (Test method for readily combustible solids)

GLP compliance:

yes

Key result

Test procedure:

burning rate test: preliminary screening test

Remarks on result:

other: The test substance ignited and charred but extinguished rapidly on removal of the test flame. It did not propagate combustion and the burning time over 200mm could not be determined.

Interpretation of results:

not classified based on GHS criteria

Conclusions:

The test substance did not propagate combustion.
In accordance with the criteria of UN Test N.1, the test substance is not classified as a flammable solid.

Executive summary:

In a GLP study performed according to UN Test Method No.1 the test substance did not propagate combustion.

Reference 2

Endpoint:

self-heating substances / mixtures

Type of information:

experimental study

Adequacy of study:

key study

Study period:

26 Jan 2021 to 03 Feb 2021

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

UN Manual of Tests and Criteria: Test N.4 (Test method for self-heating substances)

GLP compliance:

yes

Key result

Test procedure:

100 mm sample cube at 140°C

Max. temp. reached:

140.3

Induction time (h):

26

Result:

negative outcome (no effect observed)

Remarks on result:

other: The test substance shows no significant signs of exothermic activity, with the temperature of the sample reaching a maximum of only 140.3 °C during the course of the test. As this constitutes a negative result, no further testing was necessary.

Interpretation of results:

not classified based on GHS criteria

Conclusions:

The test substance does not display any significant signs of exothermic activity when tested in the 100mm cubic wire mesh container at 140 °C.
In accordance with the criteria of UN Test N.4, the test substance is not classified as a self-heating substance.

Executive summary:

In a GLP study performed according to UN Test Method N.4 the test substance showed no significant signs of exothermic activity when tested in a 100 mm wire mesh container at 140 °C.

Description of key information

A flammability study performed under GLP according to UN Test Method No.1 the test substance did not propagate combustion.

In a GLP study on the self-heating properties performed according to

UN Test Method N.4 the test substance showed no significant signs of exothermic activity when tested in a 100 mm wire mesh container at 140 °C.

The substance is known to be stable in contact with air at room temperature for prolonged periods of time and is soluble in water to form a stable mixture. Therefore, no studies are required with respect to the 'Pyrophoric solids' and 'Substance/ mixtures which in contact with water emits flammable gases' endpoints, respectively.

Key value for chemical safety assessment

Flammability:

not classified

Justification for classification or non-classification

Based on the available information, the test substance is not classified as flammable solid, self heating substance, pyrophoric solid or substance which in contact with water emits flammable gases in accordance with EU Classification, Labelling and Packaging of Substances and Mixtures (CLP) Regulation No. (EC) 1272/2008.