Cerium(4+) disulphate

Oxidising properties

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

from 2017-08-23 to 2017-09-14

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)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

TOXI-COOP ZRT., 8230 Balatonfüred, Arácsi út 97., Hungary

Contact with:

powdered cellulose

Duration of test (contact time):

>= 76 - <= 182 s

Key result

Sample tested:

1:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

169 s

Remarks on result:

mixture does not ignite and burn

Key result

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

79 s

Remarks on result:

mixture does not ignite and burn

Table 1. Reference measurements

Ratio (by mass) KBrO3: Cellulose	Weight KBrO3(g)	Weight Cellulose (g)	Observations	Burning time (sec)	Mean (sec)
3 : 7	9.02	21.02	burnt with flame	126	120
	9.01	21.10	burnt with flame	118
	9.08	21.00	burnt with flame	127
	9.07	21.03	burnt with flame	113
	9.01	21.00	burnt with flame	118

 

Table 2. Main Test

Ratio (by mass) Test Item : Cellulose	Weight Test Item (g)	Weight Cellulose (g)	Observations	Charring time (sec)	Mean (sec)
4 : 1	24.07	6.05	did not ignite, blackened	76	79
	24.07	6.03	did not ignite, blackened	77
	24.06	5.98	did not ignite, blackened	82
	23.96	6.00	did not ignite, blackened	78
	24.01	6.01	did not ignite, blackened	83
1 : 1	15.00	15.00	did not ignite, blackened	166	169
	15.05	15.04	did not ignite, blackened	182
	15.10	14.99	did not ignite, blackened	162
	15.02	15.01	did not ignite, blackened	174
	15.00	15.04	did not ignite, blackened	160

 

Interpretation of results:

GHS criteria not met

Conclusions:

The test item did not ignite in the main test at both 1:1 and 4:1 sample-to-cellulose ratios.

Executive summary:

A study accroding to UN Test Methods O.1 was conducted to determine the oxidising properties of the solid test item. The test item was ground to powder and the combustible substance - cellulose, was dried at 105 °C until constant weight. As a reference substance potassium bromate was used. The test item was mixed with cellulose in 4:1 and 1:1 ratios in the oxidizer. The mixtures were formed into a truncated conical pile, with a base diameter of 70 mm, covering the looped ignition wire resting on the reaction plate. Power was applied to the ignition wire and was maintained for the duration of the test. The burning time from when the power is switched on to when the main reaction ended was recorded. The test item-cellulose mixture did not ignite in both 4:1 and 1:1 ratios. Therefore, the test item is not classified in Division 5.1 as an oxidising solid.

Reference 2

Endpoint:

oxidising liquids

Data waiving:

study technically not feasible

Justification for data waiving:

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

Reference 3

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 solid

Description of key information

In an oxidising solids test, the test item did not ignite in all tested sample-to-cellulose ratios.

The test item has not to be classified as oxidising solid, oxidising liquid or oxidising gas.

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Additional information

The test item has not to be classified as oxidising solid, oxidising liquid or oxidising gas.

Oxidising gases

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 gases.

Oxidising liquids

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 solids

A study (reference 4.15-1) accroding to UN Test Methods O.1 was conducted to determine the oxidising properties of the solid test item. The test item was ground to powder and the combustible substance - cellulose, was dried at 105 °C until constant weight. As a reference substance potassium bromate was used. The test item was mixed with cellulose in 4:1 and 1:1 ratios in the oxidizer. The mixtures were formed into a truncated conical pile, with a base diameter of 70 mm, covering the looped ignition wire resting on the reaction plate. Power was applied to the ignition wire and was maintained for the duration of the test. The burning time from when the power is switched on to when the main reaction ended was recorded. The test item-cellulose mixture did not ignite in both 4:1 and 1:1 ratios. Therefore, the test item is not classified in Division 5.1 as an oxidising solid.

Justification for classification or non-classification

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

Based on the chemical structure 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.