Tetrasodium enneatitanium icosaoxide hydrate

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

15.4.2014-28.5.2014

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

The determination was carried out using a procedure designed to be compatible with Method A.17 Oxidising Properties (Solids) of Commission Regulation (EC) No 440/2008. Both the preliminary test and the main test were conducted.

Reason / purpose for cross-reference:

reference to other study

Qualifier:

according to guideline

Guideline:

EU Method A.17 (Oxidising Properties (Solids))

Version / remarks:

Both preliminary and main tests were conducted.

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

Certificate included in the study report.

Contact with:

powdered cellulose

Duration of test (contact time):

> 2 620 - < 4 978 s

Sample tested:

reference mixture as specified

Remarks:

Reference mixtures: barium nitrate and cellulose mixed in various ratios (10 to 90 % by weight)

Parameter:

maximum burning rate

Result:

1.324 other: mm/s (migrated information)

Key result

Sample tested:

test mixture as specified

Remarks:

Sample mixtures: test item and cellulose mixed in various ratios (10 to 90 % by weight)

Parameter:

maximum burning rate

Result:

0.089 other: mm/s (migrated information)

Preliminary test:

The test item did not ignite but the surface charred black initially before turning to a white ash. Some grey smoke was observed.

Main test:

The test item mixture smouldered but failed to ignite when the test item percentage was > 30 %. When the test item percentage was > 70 % it did not react at all. The burning rates (mm/s) of the test item and reference mixtures are presented in the following table:

% Test item/reference substance	Test item mixture - burning rate (mm/s)	Reference substance mixture - burning rate (mm/s)
10	0.040	0.788
20	0.052	1.026
30	0.055	0.870
40	0.061	1.015
50	0.076	0.971
60	0.089	1.342
70	0.076	1.156
80	-	-
90	-	-

Interpretation of results:

other: no oxidising properties

Remarks:

Migrated information

Conclusions:

According to the A.17 Oxidising Properties (EC No 440/2008), a substance is considered to be an oxidising substance when:
(a) in the preliminary test, there is a vigorous reaction;
(b) in the full test, the maximum burning rate of the mixtures tested is higher than or equal to the maximum burning rate of the reference mixture of cellulose and barium nitrate.

According to this definition the commercial product does not have oxidising properties as the commercial product's burning rates were significantly slower than the maximum burning rates obtained for the reference mixtures, and there was no vigorous reaction in the preliminary test. With sample mixtures in various ratios, the result is considered accurate.

Executive summary:

The substance has been determined to be non-oxidizing, using a procedure designed to be compatible with Method A.17 Oxidising Properties (Solids) of Commission Regulation (EC) No 440/2008 of 30 May 2008.

Description of key information

Oxidising properties test (preliminary and main test): no oxidising properties (EU Method A.17, GLP)

Key value for chemical safety assessment

Oxidising properties:

no

Additional information

According to the A.17 Oxidising Properties (EC No 440/2008), a substance is considered to be an oxidising substance when:

(a) in the preliminary test, there is a vigorous reaction;

(b) in the full test, the maximum burning rate of the mixtures tested is higher than or equal to the maximum burning rate of the reference mixture of cellulose and barium nitrate.

 

According to this definition the commercial product does not have oxidising properties as the commercial product's burning rates were significantly slower than the maximum burning rates obtained for the reference mixtures, and there was no vigorous reaction in the preliminary test. With sample mixtures in various ratios, the result is considered accurate. The results of the study are relevant for both the sodium and sodium/hydrogen forms of the substance.

Justification for classification or non-classification

The substance has been determined not to have oxidising properties using a procedure compatible with Method A.17 Oxidising Properties (Solids) of Commission Regulation (EC) No 440/2008. The substance is therefore not classified as oxidising.