Diniobium pentaoxide

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

08/09/2009 to 02/02/2010

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Contact with:

powdered cellulose

Sample tested:

test mixture (not specified)

Remarks:

migrated information

Parameter:

maximum burning rate

Result:

0 other: mm/s (migrated information)

Remarks on result:

other: The flame went out immediately after removing the ignition source

Sample tested:

reference mixture (not specified)

Remarks:

migrated information

Parameter:

maximum burning rate

Result:

0.43 other: mm/s (migrated information)

Preliminary Test

The mixture of test item and cellulose (2 portions of test item and 1 portion cellulose) was ignited at the tip of the cone. The vigour and duration of the resultant reaction was observed and recorded.

No vigorous reaction was observed. Grey smoke was observed during ignition with the flame. After removing of the ignition source no independent burning or glowing of the mixture of test item and cellulose was observed. After the test a residue of grey till brown colour was found on the top of the cone.

Main Test

The main test was performed with each one of the ranges of mixtures of the reference. The determined burning rates are given inTable1.

Table1:Burning rates of barium nitrate/cellulose-standard mixtures

Mixture of barium nitrate/ cellulose (w/w)	Burning time after the reaction zone propagated an initial distance of 30 mm [s]	Covered distance after the reaction zone propagated an initial distance of 30 mm [mm]	Burning rate   [mm/s]
6/4	462	200	0.43
6/4	471	200	0.42
6/4	486	200	0.41
6/4	468	200	0.43
6/4	463	200	0.43
6/4	467	200	0.43
		Mean:	0.43
		RSD %:	1.9

RSD = relative standard deviation

The burning rates of the test item with cellulose are given inTable2.

Table2:Burning rates of test item/cellulose-mixtures containing 10 to 90 % of test item

Mixture of Test item/ cellulose (w/w)	Burning time after the reaction zone propagated an initial distance of 30 mm [s]	Covered distance after the reaction zone propagated an initial distance of 30 mm [mm]	Burning rate   [mm/s]
9/1	0*	0	0
8/2	0*	0	0
7/3	0*	0	0
6/4	0*	0	0
5/5	0*	0	0
4/6	0*	0	0
3/7	0*	0	0
2/8	0*	0	0
1/9	0*	0	0

* the flame went out immediately after removing the ignition source

Because the burning rates of the single determinations (Table2) showed that there was no reaction zone which travelled along the pile the test item was not considered to be an oxidizing substance and no further testing was performed.

Interpretation of results:

other: no oxidising properties

Remarks:

Migrated information

Conclusions:

Diniobium Pentaoxide is not considered to be an oxidising substance because there was no reaction zone which travelled along the pile for each tested mixture of Diniobium Pentaoxide and cellulose.

Description of key information

not oxidising

(EU method A.17)

Key value for chemical safety assessment

Oxidising properties:

no

Additional information

Diniobium Pentaoxide is not considered to be an oxidising substance because there was no reaction zone which travelled along the pile for each tested mixture of Diniobium Pentaoxide and cellulose.

Justification for classification or non-classification

The available data on oxidising properties of the test substance do not meet the criteria for classification according to Regulation (EC) 1272/2008 and are therefore conclusive but not sufficient for classification: based on the test according to EU Method A.17 the substance is not oxidising.