rac-(1R,4S,4aR,8R,8aS)-9-(dichloromethylidene)-8-hydroxyoctahydro-1,4-methanonaphthalen-5(1H)-one

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

20 Jan 2015 to 27 Feb 2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

UN Manual of Tests and Criteria: Test O.1 (Test for oxidizing solids)

Version / remarks:

2009

Deviations:

no

GLP compliance:

yes

Contact with:

powdered cellulose

Duration of test (contact time):

>= 3 min

Key result

Sample tested:

1:1 sample-to-cellulose ratio

Parameter:

mean burning time

Remarks on result:

mixture does not ignite and burn

Key result

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

mean burning time

Remarks on result:

mixture does not ignite and burn

Applied power to the ignition coil: 150±7 W

The burning times for the test substance and reference substance mixtures with cellulose are tabulated below. In all cases the mixtures burned vigorously with a flame.

 

Test No.	Burning Times (s)
	Test Substance		Reference
	4:1	1:1	3:7
1.	370	327	120
2.	284	450	89
3.	321	325	64
4.	410	360	83
5.	223	288	80
Mean	322	350	87

Interpretation of results:

GHS criteria not met

Conclusions:

The mean burning times of the test substance/cellulose mixtures are both greater than the mean burning time of the potassium bromate/cellulose mixtures. In accordance with the criteria of UN Test O.1, the test substance is not classified as an oxidizing solid.

Executive summary:

The Oxidising Properties of the test item were tested in accordance with the UN Test O.1: “Test for Oxidizing Solids”. Tests are conducted on the test substance when mixed with dry fibrous cellulose in ratios of 1:1 and 4:1, by mass, of sample to cellulose. The burning characteristics of the mixtures are compared with a standard 3:7 reference mixture, by mass, of potassium bromate to cellulose.  If the burning time is less than or equal to the standard reference mixture, further comparisons are made with reference mixtures of 3:2 and 2:3 ratios, by mass, of potassium bromate to cellulose respectively. Each test mixture is formed into a conical pile of base diameter 70 mm, covering a looped ignition wire resting on a low heat conducting base plate. Electrical power is applied to the ignition wire for a minimum of three minutes if no reaction takes place, or until the end of the test if the mixture shows signs of ignition (e.g. flames, incandescence or glowing combustion). The burning time is recorded from the initial application of power to the wire until the end of the main reaction. The mean burning time from five evaluations is used for comparisons between mixtures. In all cases the mixtures burned vigorously with a flame. The mean burning times of the test substance/cellulose mixtures are both greater than the mean burning time of the potassium bromate/cellulose mixtures. In accordance with the criteria of UN Test O.1, the test substance is not classified as an oxidising solid.

Description of key information

The mean burning times of the test substance/cellulose mixtures are both greater than the mean burning time of the potassium bromate/cellulose mixtures, therefore the test substance is not classified as an oxidizing solid, UN Test O.1, Jackson 2015.

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Additional information

The Oxidising Properties of the test item were tested in accordance with the UN Test O.1: “Test for Oxidizing Solids”. Tests are conducted on the test substance when mixed with dry fibrous cellulose in ratios of 1:1 and 4:1, by mass, of sample to cellulose. The burning characteristics of the mixtures are compared with a standard 3:7 reference mixture, by mass, of potassium bromate to cellulose.  If the burning time is less than or equal to the standard reference mixture, further comparisons are made with reference mixtures of 3:2 and 2:3 ratios, by mass, of potassium bromate to cellulose respectively. Each test mixture is formed into a conical pile of base diameter 70 mm, covering a looped ignition wire resting on a low heat conducting base plate. Electrical power is applied to the ignition wire for a minimum of three minutes if no reaction takes place, or until the end of the test if the mixture shows signs of ignition (e.g. flames, incandescence or glowing combustion). The burning time is recorded from the initial application of power to the wire until the end of the main reaction. The mean burning time from five evaluations is used for comparisons between mixtures. In all cases the mixtures burned vigorously with a flame. The mean burning times of the test substance/cellulose mixtures are both greater than the mean burning time of the potassium bromate/cellulose mixtures. In accordance with the criteria of UN Test O.1, the test substance is not classified as an oxidising solid (Jackso, 2015). The study is considered to be relevant, reliable (Klimisch 1) and adequate for the purposes of risk assessment, classification and labelling.

Justification for classification or non-classification

Based on the available information, the test substance does not need to be classified for oxidising solid in accordance with EU Classification, Labelling and Packaging of Substances and Mixtures (CLP) Regulation (EC) No. 1272/2008.