mecoprop-P (ISO); (R)-2-(4-chloro-2-methylphenoxy)propionic acid

Oxidising properties

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

oxidising solids

Remarks:

Solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

11 February 1999 to 16 April 1999

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.17 (Oxidising Properties (Solids))

Deviations:

no

GLP compliance:

yes

Contact with:

powdered cellulose

Key result

Sample tested:

test mixture as specified

Parameter:

burning rate

Remarks on result:

mixture does not ignite and burn

As neither mixture of 2:1, 1:1 or 1:2 test material/cellulose burned to completion, the test material is considered to be non-oxidising.

By comparison, the reference mixture burned vigorously to completion in 64 seconds. No further testing was therefore necessary.

Interpretation of results:

other: Not classified according to EU criteria.

Conclusions:

Under the conditions of the study the test material is not oxidising.

Executive summary:

The oxidising properties of the test material were assessed according to EU Method A.17 and in compliance with GLP.

The test material, cellulose and barium nitrate used as a reference were dried and sieved (125 μm) prior to use. The dried test material (2 parts) was thoroughly mixed with dried cellulose (1 part) and formed into a cone shaped pile of dimensions 3.5 cm (diameter of base) x 2.5 cm (height). The cone, on a non-combustible, non-porous surface was ignited with a gas burner. The vigour and duration of the combustion were observed, recorded and compared with that of a similarly prepared cone consisting of 3 parts of barium nitrate to 2 parts of cellulose.

As the sample cone failed to burn to completion, cones consisting of the test material (technical grade) (1 part) and cellulose (1 and 2 parts) were prepared and tested.

As neither mixture of 2:1, 1:1 or 1:2 test substance/cellulose burned to completion, the test material (technical grade) is considered to be non-oxidising. By comparison, the reference mixture burned vigorously to completion in 64 seconds.

Under the conditions of the study the test material is not oxidising.

Reference 2

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

11 April 1990 to 20 August 1990

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.17 (Oxidising Properties (Solids))

Deviations:

no

GLP compliance:

yes

Contact with:

other: Dried cellulose

Duration of test (contact time):

>= 5 min

Key result

Sample tested:

test mixture as specified

Parameter:

burning rate

Result:

ca. 5 min

Remarks on result:

other: The outside of the pile burned but extinguished itself in approximately 5 minutes.

Sample	Observation
Cellulose	The outside of the pile burned slowly (approx 2 minutes), with some unburned cellulose remaining within the charred outer shell.
Barium nitrate/cellulose (2:1 w/w)	A rapid reaction occurred with the whole pile burning in less than 1 minute.
Test material/cellulose (2:1 w/w)	Burning rate was considerably slower than for barium nitrate/cellulose (2:1 w/w) or cellulose alone. The outside of the pile burned but extinguished itself in approximately 5 minutes. The test material melted forming a brown, viscous liquid and a large amount of unburned sample remained within this charred outer shell.

 The test material is non-oxidising.

Interpretation of results:

other: Not classified according to EU criteria.

Conclusions:

Under the conditions of the study the test material is non-oxidising.

Executive summary:

Oxidising properties was assessed according to EEC Method A17 and in compliance with GLP.

The test mixture was prepared by mixing the test material thoroughly with dried cellulose (2:1 w/w). Also subjected to the test was dried cellulose alone and, as a reference, a mixture of barium nitrate and dried cellulose (2:1 w/w). The test samples were formed into conical piles by filling a plugged 35 nm glass funnel and inverting onto an asbestos board. The top of each pile was subsequently ignited with a gas burner flame, and burning times observed.

The burning rate for the test material/cellulose (2:1 w/w) mix was considerably slower than for barium nitrate/cellulose (2:1 w/w) or cellulose alone. The outside of the pile burned but extinguished itself in approximately 5 minutes. The test material melted forming a brown, viscous liquid and a large amount of unburned sample remained within this charred outer shell. 

Under the conditions of the study the test material is non-oxidising.

Description of key information

Comb (2000)

Under the conditions of the study the test material is not oxidising.

O'Connor (1990)

Under the conditions of the study the test material is non-oxidising.

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Additional information

O'Connor (1990)

Oxidising properties was assessed according to EEC Method A17 and in compliance with GLP. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

The test mixture was prepared by mixing the test material thoroughly with dried cellulose (2:1 w/w). Also subjected to the test was dried cellulose alone and, as a reference, a mixture of barium nitrate and dried cellulose (2:1 w/w). The test samples were formed into conical piles by filling a plugged 35 nm glass funnel and inverting onto an asbestos board. The top of each pile was subsequently ignited with a gas burner flame, and burning times observed.

The burning rate for the test material/cellulose (2:1 w/w) mix was considerably slower than for barium nitrate/cellulose (2:1 w/w) or cellulose alone. The outside of the pile burned but extinguished itself in approximately 5 minutes. The test material melted forming a brown, viscous liquid and a large amount of unburned sample remained within this charred outer shell. 

Under the conditions of the study the test material is non-oxidising.

Comb (2000)

The oxidising properties of the test material were assessed according to EU Method A.17 and in compliance with GLP. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

The test material, cellulose and barium nitrate used as a reference were dried and sieved (125 μm) prior to use.The dried test material (2 parts) was thoroughly mixed with dried cellulose (1 part) and formed into a cone shaped pile of dimensions 3.5 cm (diameter of base) x 2.5 cm (height). The cone, on a non-combustible, non-porous surface was ignited with a gas burner. The vigour and duration of the combustion were observed, recorded and compared with that of a similarly prepared cone consisting of 3 parts of barium nitrate to 2 parts of cellulose.

As the sample cone failed to burn to completion, cones consisting of the test material (technical grade) (1 part) and cellulose (1 and 2 parts) were prepared and tested.

As neither mixture of 2:1, 1:1 or 1:2 test substance/cellulose burned to completion, the test material (technical grade) is considered to be non-oxidising.By comparison, the reference mixture burned vigorously to completion in 64 seconds.

Under the conditions of the study the test material is not oxidising.

Justification for classification or non-classification

In accordance with the criteria for classification as defined in Annex I, Regulation (EC) No 1272/2008, the material does not require classification with respect to oxidising properties.