Methyl (R)-2-(4-(3-chloro-5-trifluoromethyl-2-pyridyloxy)phenoxy)propionate

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising liquids

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.21 (Oxidising Properties (Liquids))

Deviations:

no

GLP compliance:

yes

Specific details on test material used for the study:

Haloxyfop (R) methyl ester
Lot #: OC30150101 (TSN102229)
Purity: 96.7%

Contact with:

other: cellulose with a fibre length between 50 and 250 µm and a mean diameter of 25 µm

Duration of test (contact time):

10 min

Key result

Sample tested:

test mixture 1:1

Parameter:

mean pressure rise time

Result:

9.74 s

Remarks on result:

other: Non-oxidising

Sample tested:

reference mixture with 65% nitric acid + cellulose (1:1 ratio)

Parameter:

mean pressure rise time

Result:

3.95 s

Interpretation of results:

GHS criteria not met

Conclusions:

The test substance was considered to be non-oxidising

Executive summary:

The study was conducted according to EEC method A21. The combustible substance used in the test was cellulose with a fibre length between 50 and 250 µm and a mean diameter of 25 µm. The cellulose was dried at approximately 105°C prior to testing to achieve a water content of less than 0.5% w/w.

Cellulose (3 g) and the test substance (3 g) were mixed together and a portion (5 g) of the mixture was transferred to the pressure vessel. The vessel was closed with the bursting disc and a current of 10 amps was applied to the ignition wire. It was ensured that the time between mixing and applying the power was less than 10 minutes.

The time taken for the pressure to rise from 690 kPa to 2070 kPa above atmospheric was recorded. The procedure was conducted a total of five times with the test substance. The test was also conducted five times with the cellulose/reference mixture - the reference substance was 65% w/w aqueous nitric acid.

A liquid test substance is considered to be an oxidiser if: a 1:1 w/w mixture of the test substance and cellulose spontaneously ignites; or, a 1:1 w/w mixture of the test substance and cellulose exhibits a mean pressure rise time less than or equal to the mean pressure rise time of a 1:1 mixture of 65% w/w aqueous nitric acid and cellulose.

The mean pressure rise time for the reference mixture (1:1 w/w mixture of 65% w/w aqueous nitric acid and cellulose) was 4.0 seconds, while the mean pressure rise time for the test substance mixtures (1:1 w/w mixture of the test substance and cellulose) was 9.7 seconds. Since the time for the test substance mixture was greater than that for the reference mixture, the test substance was considered to be a non-oxidiser.

Description of key information

EU Method A.21

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Justification for classification or non-classification

Substance was not oxidizing in a test according to EU Method A.21; therefore, no classification is required according to EU Classification, Labelling and Packaging of Substances and Mixtures (CLP) Regulation (EC) No. 1272/2008.