2-chloro-2-methylpropane

Oxidising properties

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

oxidising liquids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

from 2016-09-20 to 2016-09-21

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

comparable to guideline study

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

GLP compliance:

no

Contact with:

powdered cellulose

Duration of test (contact time):

>= 70 min

Sample tested:

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

Parameter:

mean pressure rise time

Result:

5.06 s

Key result

Sample tested:

test mixture as specified

Parameter:

mean pressure rise time

Result:

34.01 s

Individual results

Test series of at least 5 tests each were performed with the test itemand with 65 % nitric acid in 1:1 mixture, by mass, with cellulose. The cellulose was dried at 105 ± 5 °C until the weight was constant. Due to the partiele size of the cellulose grinding and sieving was not necessary.

Reference substance

In Table 1 the pressure rise times from 690 kPa_g to 2070 kPa_g for the 1:1 mixtures, by mass, of 65 % (w/w) nitric acid and cellulose are presented. The given values were rounded.

Table 1: Pressure rise time for the 1:1 mixtures, by mass, of 65% nitric acid and cellulose

	Test 1	Test 2	Test 3	Test 4	Test 5
Time at 690 kPag in s	21.38	18.44	17.99	17.15	17.60
Time at 2070 kPag in s	26.26	22.54	23.60	22.35	23.07
Pressure rise time in s	4.88	4.11	5.62	5.21	5.47

The values of the pressure rise times in table 1 are obtained from the unrounded values. The mean pressure rise time was 5.06 s. All measured values are within the tolerable range of +30 % (3.54 - 6.57 s) of the mean pressure rise time.

Test item

As the test item has a high vapour pressure the mixing time was reduced. In Table 2 the pressure rise times from 690 kPa_g to 2070 kPa_g for the 1:1 mixtures, by mass, of the test item and cellulose are shown. The given values were rounded. In four tests the pressure did not reach 2070 kPa_g.

Table 2: Pressure rise time for the 1:1 mixtures, by mass, of test item and cellulose

	Test 1	Test 2	Test 3	Test 4	Test 5
Time at 690 kPag in s	24.09	31.31	26.71	26.10	27.41
Time at 2070 kPag in s	58.10	Not reached	Not reached	Not reached	Not reached
Pressure rise time in s	34.01	Not evaluable	Not evaluable	Not evaluable	Not evaluable

The mean pressure rise time was 34.01 s.

Due to the fact that the 1:1 mixture, by mass, of test item and cellulose had a mean pressure rise time higher than that of a 1:1 mixture, by mass, of 65 % (w/w) nitricacid and cellulose the test item had no oxidising properties and no further reference mixtures had to be measured.

Interpretation of results:

GHS criteria not met

Conclusions:

The test item was determined to be not oxidising under the test conditions of method A.21 of Commission Regulation (EC) No. 440/2008.

Executive summary:

A study was performed in accordance with Commission Regulation (EC) No. 440/2008, method A.21 in order to determine whether the test item has oxidising properties. The test item was mixed 1:1 with fibrous cellulose and introduced into a pressure vessel. The mixture was heated in the pressure vessel and the rate of pressure rise was determined. The time taken for the pressure rise from 690 kPa to 2070 kPa above atmosphere was noted. In parallel the pressure rise time of a reference mixture was determined (1:1 mixture, by mass, of 65 % nitric acid and cellulose). The pressure rise times of both mixtures were tested five times each. Due to the fact that the 1:1 mixture of test item and cellulose had a mean pressure rise time of 34.01 s, which was higher than that of the reference mixture (5.06 s) the test item was considered to have no oxidising properties and no further reference mixtures had to be measured.

Reference 2

Endpoint:

oxidising gases

Data waiving:

study technically not feasible

Justification for data waiving:

the study does not need to be conducted because the substance is a liquid

Reference 3

Endpoint:

oxidising solids

Data waiving:

study technically not feasible

Justification for data waiving:

the study does not need to be conducted because the substance is a liquid

Description of key information

The test item was determined to be not oxidising.

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Additional information

Oxidising solids (reference 4.15-1)

The test item is a solid at ambient conditions. This hazard class is only applicable for liquids. Thus, the substance was not considered for classification as oxidising liquid.

 

Oxidising liquids (reference 4.15-2)

A study was performed in accordance with Commission Regulation (EC) No. 440/2008, method A.21 in order to determine whether the test item has oxidising properties. The test item was mixed 1:1 with fibrous cellulose and introduced into a pressure vessel. The mixture was heated in the pressure vessel and the rate of pressure rise was determined. The time taken for the pressure rise from 690 kPa to 2070 kPa above atmosphere was noted. In parallel the pressure rise time of a reference mixture was determined (1:1 mixture, by mass, of 65 % nitric acid and cellulose). The pressure rise times of both mixtures were tested five times each. Due to the fact that the 1:1 mixture of test item and cellulose had a mean pressure rise time of 34.01 s, which was higher than that of the reference mixture (5.06 s) the test item was considered to have no oxidising properties and no further reference mixtures had to be measured (reference 4.15 -2).

 

Oxidising gases (reference 4.15-3)

The test item is a solid at ambient conditions. This hazard class is only applicable for gases. Thus, the substance was not considered for classification as oxidising gas.

Justification for classification or non-classification

Classification, Labelling, and Packaging Regulation (EC) No. 1272/2008

Based on the results of the performed study according to method A.21 of Commission Regulation (EC) No. 440/2008 and taking into account the provisions laid down in Regulation (EC) No. 1272/2008, as amended for the tenth time in Regulation (EC) No. 2017/776, the substance is not considered to be classified for oxidising properties.