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Physical & Chemical properties

Oxidising properties

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Reference
Endpoint:
oxidising solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
14 December 2017 to 31 January 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 0
Qualifier:
according to
Guideline:
UN Manual of Tests and Criteria: Test O.1 (Test for oxidizing solids)
Deviations:
yes
Remarks:
the particle size of potassium bromate was lower than 150 µm instead of being higher. The test material was not completely crushed. This deviation was not considered to have affected the quality or the interpretation of the results obtained.
GLP compliance:
yes (incl. certificate)
Test material information:
Composition 1
Specific details on test material used for the study:
A representative fraction of the test material was sieved through a 500 µm sieve. The fraction passing under 500 µm was used.

Contact with:
powdered cellulose
Key result
Sample tested:
reference: 3:7 mixture potassium bromate + cellulose
Parameter:
mean burning time
Result:
154 s
Remarks on result:
other: Ignition, projections and smoke.
Key result
Sample tested:
reference: 2:3 mixture potassium bromate + cellulose
Parameter:
mean burning time
Result:
90 s
Remarks on result:
other: Ignition, projections and smoke
Key result
Sample tested:
reference: 3:2 mixture potassium bromate + cellulose
Parameter:
mean burning time
Result:
3 s
Remarks on result:
other: Ignition, projections and smoke
Key result
Sample tested:
4:1 sample-to-cellulose ratio
Parameter:
mean burning time
Result:
14 s
Remarks on result:
other: Vigorous ignition, smoke, combustion and the mixture melted.
Key result
Sample tested:
1:1 sample-to-cellulose ratio
Parameter:
mean burning time
Result:
39 s
Remarks on result:
other: Ignition, smoke and combustion.

The mean time of reaction with the test material / cellulose mixture in proportion 4:1 was lower than the mean time of reaction with the reference item / cellulose mixture in proportions 2:3.

The mean time of reaction with the test material / cellulose mixture in proportion 1:1 was lower than the mean time of reaction with the reference item / cellulose mixture in proportions 2:3.

Interpretation of results:
other: oxidising solid (category 2) according to EU criteria
Conclusions:
Under the conditions of the study the test materieal was determined to be an oxidising solid (category 2) in accordance with EU criteria.
Executive summary:

The potential of the test material to be an oxidising solid was investigated in a study which was conducted in accordance with UN Method O.1 under GLP conditions.

During the test, the duration of the burning reaction of test material mixtures was compared to reference item mixtures.

Under the conditions of the study, the mean time of reaction with the test material / cellulose mixture in proportion 4:1 was lower than the mean time of reaction with the reference item / cellulose mixture in proportions 2:3.

The mean time of reaction with the test material / cellulose mixture in proportion 1:1 was lower than the mean time of reaction with the reference item / cellulose mixture in proportions 2:3.

Therefore, the test material was assigned to packing group II. This Transport Packing Group II corresponds to a classification In “Oxidising Solid Category 2” according to CLP Regulation (EC) No. 1272/2008.

Description of key information

Under the conditions of the study the test materieal was determined to be an oxidising solid (category 2) in accordance with EU criteria.

Key value for chemical safety assessment

Oxidising properties:
oxidising

Additional information

Demangel (2018)

The potential of the test material to be an oxidising solid was investigated in a study which was conducted in accordance with UN Method O.1 under GLP conditions. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

During the test, the duration of the burning reaction of test material mixtures was compared to reference item mixtures.

Under the conditions of the study, the mean time of reaction with the test material / cellulose mixture in proportion 4:1 was lower than the mean time of reaction with the reference item / cellulose mixture in proportions 2:3.

The mean time of reaction with the test material / cellulose mixture in proportion 1:1 was lower than the mean time of reaction with the reference item / cellulose mixture in proportions 2:3.

Therefore, the test material was assigned to packing group II. This Transport Packing Group II corresponds to a classification In “Oxidising Solid Category 2” according to CLP Regulation (EC) No. 1272/2008.

Sax's Handbook

According to the handbook data the substance may react violently with Al, As, C, Cu, H2O2, metal sulphides, organic matter, P, K, S.

Cosmetic Ingredient Review

According to the review data, sodium iodate is an inorganic salt that functions as an oxidising agent. Pure sodium iodate is a sufficiently strong oxidising agent that it presents a fire risk near organic material, and it can react violently with aluminium, arsenic, carbon, copper, hydrogen peroxide, phosphorus, potassium, sulphur, and metal sulphides.

Justification for classification or non-classification

In accordance with the criteria for classification as defined in Annex I, Regulation (EC) No 1272/2008, the substance requires classification as an oxidising solid (category 2) and is assigned the hazard phrase "H272: May intensify fire; oxidiser".