Vanadium oxide sulphate

Oxidising properties

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

2012-06-26 to 2012-07-06

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:

no

Contact with:

powdered cellulose

Duration of test (contact time):

180 s

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

>= 180 s

Sample tested:

1:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

180 s

Sample tested:

reference: 3:7 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

128 s

Reference Mixture

The results of the reference mixtures of potassium bromate and cellulose

Potassium bromate – Cellulose	Test 1	Test 2	Test 3	Test 4	Test 5	Average
3:7	128 s	125 s	124 s	135 s	126 s	128 s

Note: Testing of the reference mixtures at the ratios 2:3 and 3:2 potassium bromate to cellulose is not required for the classification of the test item.

 

The results of the mixtures of test item and cellulose

Test item – Cellulose	Test 1	Test 2	Test 3	Test 4	Test 5	Average
4:1	>180 s	>180 s	>180 s	180 s	180 s	180 s
1:1	180 s	180 s	180 s	180 s	180 s	180 s

An open flame was not observed in any of the tests with the test item and cellulose. In the 4:1 mixture test, the test item charred while power was applied to the ignition wire; thereafter no further charring was observed. In the 1:1 mixture test, the test item charred while power was applied to the ignition wire and after the power was switched off. At the end of the test, the test item was completely charred.

Therefore, the test item does not ignite and burn in 4:1 and 1:1 mixtures with cellulose.

Classification

UN-Transport regulations

The test item does not need to be classified as oxidizing solid in Division 5.1 according to the UN-Transport Regulations.

GHS and EC 1272/2008 (CLP-Guideline)

The test item does not need to be classified as oxidizing solid according to GHS and EC 1272/2008 (CLP-Guideline) Annex 1: 2.14.

Interpretation of results:

GHS criteria not met

Conclusions:

Vanadium, oxalate complexes contains residual moisture of 0.9 wt.-% as determined by drying the test item under reduced pressure (approximately 100 mbar) at a temperature of 50 °C.

Vanadium, oxalate complexes does not need to be classified as oxidizing solid in Division 5.1 according to the UN-Transport regulation,GHS and EC 1271/2008 (CLP-Guideline) Annex 1: 2.14.

Reference 2

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

2012-11-19 to 2012-12-11

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:

no

Contact with:

powdered cellulose

Duration of test (contact time):

180 s

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

> 180 s

Sample tested:

1:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

> 180 s

Sample tested:

reference: 3:7 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

141 s

Sample tested:

reference: 2:3 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

72 s

Reference Mixture

The results of the reference mixtures of potassium bromate and cellulose

Potassium bromate – Cellulose	Test 1	Test 2	Test 3	Test 4	Test 6	Average
3:7	133 s	142 s	155 s	130 s	145	141 s
2:3	65 s	71 s	75 s	81 s	70 s	72 s
3:2	---	---	---	---	---	---

In test 5 the heating wire broke, hence a 6^thtest was carried out. The test with the 3:2 mixture was not necessary for classification.

 

The results of the mixtures of test item and cellulose

Test item – Cellulose	Test 1	Test 2	Test 3	Test 4	Test 5	Average
4:1	-	-	-	-	-	> 180 s
1:1	-	-	-	-	-	> 180 s

The test item/cellulose mixtures did not burn. The mixtures were held for 180 s with the ignition wire switched on, during this time blackening around the wire, smoldering and a slight smoke release were observed. The mixtures also turned slightly yellow.

Therefore, the test item in the 4:1 and 1:1 test item-to-cellulose ratio does not ignite and burn

Classification:

UN-Transport Guideline

The test item does not have to be classified as oxidizing solid in Division 5.1 according to the UN-Transport Regulations.

GHS and EC 1272/2008 (CLP-Regulation)

The test item does not have to be classified as oxidizing solid according to GHS and EC 1272/2008 (CLP-Guideline) Annex 1: 2.14.

Interpretation of results:

GHS criteria not met

Conclusions:

Divanadium tris(sulphate) contains a residual moisture of 4.4 wt.-% which was determined by drying the test item under reduced pressure (approximately 100 mbar) at a temperature of 50 °C.

Divanadium tris(sulphate) does not have to be classified as oxidizing sold in Division 5.1 according to the UN-Transport Guideline, GHS or EC 1271/2008 (CLP-Regulation) Annex 1: 2.14.

Description of key information

Divanadium tris(sulphate) does not have to be classified as oxidizing sold in Division 5.1 according to the UN-Transport Guideline, GHS or EC 1271/2008 (CLP-Regulation) Annex 1: 2.14.

Vanadium, oxalate complexes does not need to be classified as oxidizing solid in Division 5.1 according to the UN-Transport regulation, GHS and EC 1271/2008 (CLP-Guideline) Annex 1: 2.14.

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Additional information

Divanadium tris(sulphate) (a trivalent V-sulphate substance) and vanadium, oxalate complexes (a tetravalent vanadium substance), have a higher or equal oxygen content (49.2 % and ca. 52 %, respectively) compared to vanadium sulphate oxide (a tetravalent vanadium substance) with an oxygen content of 49 %. Since test results for both substances indicate a lack of oxidising properties, applying bridging (read-across) principles vanadium oxide sulphate is not considered to have any oxidising properties.

Justification for classification or non-classification

Oxidising properties are considered non-relevant for vanadium oxide sulphate. Thus, vanadium oxide sulphate does not need to be classified as oxidizing solid according to Regulation (EC) 1272/2008 (CLP) Annex 1: 2.14 and UN-Transport Regulation, Division 5.1.