(1-λ1-oxidanyl-2,2,6,6-tetramethylpiperidin-4-yl) benzoate

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2012-08-01 to 2012-08-08

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: The study is regarded as reliable without restrictions because it was conducted in compliance with GLP regulation and guideline.

Qualifier:

according to guideline

Guideline:

other: UN test O.1 (UN "Manual of Tests and Criteria", ST/SG/AC.10/11/Rev.5, 2009, 34.4.1)

Deviations:

no

Principles of method if other than guideline:

The test is designed to measure the potential for a solid substance to increase the burning rate or burning intensity of a combustible substance when the two are thoroughly mixed. In this test certain mixtures of the test substance and of the reference substances with cellulose are formed to a defined conical pile. After electrical ignition on a plate with low thermal conductivity the mean burning time from five trials is determined. If the mean burning time of the substance mixture with cellulose (lowest of the two ratios 4:1 and 1:1) is less than that of a 3:7 mixture of potassium bromate with cellulose the criterion for Div. 5.1 is fulfilled. In this case further reference mixtures (2:3 and 3:2 ratios of potassium bromate and cellulose) have to be tested in order to find the assignment of the substance to the different packing groups (PG I – PG III) in Div. 5.1.
The test criteria for determining oxidizing properties of the substance are:
Packing Group I: any substance which, in the 4 :1 or 1:1 sample to cellulose ratio (by mass) tested, exhibits a mean burning time less than the mean burning time of a 3:2 mixture, by mass, of potassium bromate and cellulose.
Packing Group II: any substance which, in the 4 :1 or 1:1 sample to cellulose ratio (by mass) tested, exhibits a mean burning time equal to or less than the mean burning time of a 2:3 mixture, by mass, of potassium bromate and cellulose; and which does not meet the criteria for packing group I
Packing Group III: any substance which, in the 4 :1 or 1:1 sample to cellulose ratio (by mass) tested, exhibits a mean burning time equal to or less than the mean burning time of a 3:7 mixture, by mass, of potassium bromate and cellulose; and which does not meet the criteria for packing groups I and II.
Not Division 5.1: any substance which, in both the 4 :1 or 1:1 sample to cellulose ratio (by mass) tested, does not ignite and burn, or exhibits mean burning times greater than that of a 3:7 mixture (by mass) of potassium bromate and cellulose.

GLP compliance:

yes

Sample tested:

test mixture (not specified)

Parameter:

maximum burning rate

Result:

> 600 s

Remarks on result:

other: Ratio 4:1 cellulose

Sample tested:

test mixture (not specified)

Parameter:

maximum burning rate

Result:

> 600 s

Remarks on result:

other: Ratio 1:1 with cellulose

Sample tested:

reference mixture (not specified)

Parameter:

maximum burning rate

Result:

123 s

Remarks on result:

other: mixtures of Potassium bromate with Cellulose Ratio 3:7 (PGIII)

Sample tested:

test mixture (not specified)

Parameter:

maximum burning rate

Result:

45 s

Remarks on result:

other: mixtures of Potassium bromate with Cellulose Ratio 2:3 (PGII)

Interpretation of results:

other: no oxidising properties

Conclusions:

The sample did not meet the classification criteria of Division 5.1 according to UN "Manual of Tests and Criteria" test method O.1.

Executive summary:

4-Hydroxy TEMPO is not considered to have oxidising properties.

Key value for chemical safety assessment

Oxidising properties:

non oxidising