Manganese dioxide

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1 July 2009 to 8 July 2009

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: see 'Remark'

Remarks:

Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or methodological deficiencies, which do not affect the quality of the relevant results. The study report was conclusive and done to a valid guideline.

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

GLP compliance:

no

Sample tested:

test mixture (not specified)

Parameter:

maximum burning rate

Result:

0.442 other: mm/s

Remarks on result:

other: Fastest mixture, test material: cellulose, 80:20

Sample tested:

test mixture (not specified)

Parameter:

maximum burning rate

Result:

0.41 other: mm/s

Remarks on result:

other: Second fastest mixture, test material: cellulose, 70:30

Sample tested:

test mixture (not specified)

Parameter:

maximum burning rate

Result:

0.412 other: mm/s

Remarks on result:

other: Third fastest mixture, test material: cellulose, 90:10

Sample tested:

reference mixture (not specified)

Parameter:

maximum burning rate

Result:

0.926 other: mm/s

Table 1: Reference mixtures

 

% Barium Nitrate	Observations	Burning Time (s)	Burning Rate (mm/s)
10	The pile burned with an yellow flame which produced grey smoke and left black charred remains.	265	0.784
20	The pile burned with an yellow flame which produced grey smoke and left black/grey charred remains.	255	0.784
30	The pile burned with an orange/green flame which produced grey smoke and left black/grey charred remains.	243	0.823
40	The pile burned with an yellow/green flame which produced grey smoke and left black/grey charred remains.	280	0.714
50	The pile burned with an green/ yellow flame which produced grey smoke and left black/grey charred remains.	223	0.897
60	The pile burned with an green/yellow flame which produced grey smoke and left black/grey charred remains.	242	0.826
70	The pile burned with an green/yellow flame which produced grey smoke and left whitish/grey charred remains.	216	0.926
80	The pile burned with an small green/yellow flame which produced grey smoke. The flame self-extinguished after propagating combustion over 3mm in 19 seconds.	-	-
90	The pile failed to ignite.	-	-
Maximum burning rate = 0.926 mm/s

 

Table 2: Cellulose mixtures

 

% Barium Nitrate	Observations	Burning Time (s)	Burning Rate (mm/s)
10	The pile ignited and burnt with a small yellow/ blue flame which produced grey smoke and orange sparks. The flame self-extinguished approximately 48 mm along the pile but continued to smoulder across the pile, leaving brown charred powdery remains.	2051	0.098
20	The pile ignited and burned with an yellow/blue flame which produced grey smoke and orange sparks. The flame self-extinguished approximately 16 mm along the pile but continued to smoulder across the pile, leaving brown charred powdery remains.	1848	0.108
30	The pile ignited and burned with a small yellow/blue flame which self-extinguished but continued to smoulder along the length of the pile(30mm) and leave brown charred powdery remains.	1326	0.151
40	The pile ignited and burned with a small yellow/blue flame which self extinguished within the initial 30mm but continued to smoulder producing grey smoke and leaving brown charred powdery remains.	940	0.213
50	The pile ignited and burned with a small yellow/blue flame which self extinguished within the initial 30mm but continued to smoulder producing grey smoke and leaving brown charred powdery remains.	871	0.230
60	The pile ignited and burned with a small yellow/blue flame which self extinguished within the initial 30mm but continued to smoulder producing grey smoke and leaving brown charred powdery remains.	855	0.234
70	The pile ignited and burned with a small yellow/blue flame which self extinguished within the initial 30mm but continued to smoulder producing grey smoke and leaving brown/black charred powdery remains.	766	0.261
80	The pile did not ignite with a visible flame but glowed and smouldered across the pile, producing grey smoke and leaving brown/black charred powdery remains.	719	0.278
90	The pile ignited with a small orange/red flame. The pile smouldered with an occasional flaring of flame. Black smoke was produced and brown/black powdery charred remains were left.	808	0.248
Maximum burning rate = 0.278 mm/s Maximum burning rate reference mixtures = 0.926 mm/s

 

Table 3: Fastest Burning Rate Mixture, Test Material: Cellulose Ratio = 80:20

 

Test	Observations	Burning Time (s)	Burning Rate (mm/s)
1	The pile smouldered producing grey smoke and left black/dark grey ash.	521	0.384
2	The pile smouldered producing grey smoke and left black/dark grey ash.	477	0.419
3	The pile smouldered producing grey smoke and left black/dark grey ash.	466	0.429
4	The pile smouldered producing grey smoke and left black/dark grey ash.	455	0.440
5	The pile smouldered producing grey smoke and left black/dark grey ash.	453	0.442
6	The pile smouldered producing grey smoke and left black/dark grey ash.	461	0.434
Maximum burning rate = 0.442 mm/s Maximum burning rate of reference mixtures = 0.995 mm/s

 

Table 4: Second Fastest Burning Rate Mixture, Test Material: Cellulose Ratio = 70:30

 

Test	Observations	Burning Time (s)	Burning Rate (mm/s)
1	The pile smouldered producing a few tiny sparks and grey smoke and left dark grey ash	570	0.351
2	The pile smouldered producing a few tiny sparks and grey smoke and left dark grey ash	543	0.368
3	The pile smouldered producing a few tiny sparks and grey smoke and left dark grey ash	503	0.398
4	The pile smouldered producing a few tiny sparks and grey smoke and left dark grey ash	504	0.397
5	The pile smouldered producing a few tiny sparks and grey smoke and left dark grey ash	514	0.389
6	The pile smouldered producing a few tiny sparks and grey smoke and left dark grey ash	488	0.410
Maximum burning rate = 0.410 mm/s Maximum burning rate of reference mixtures = 0.995 mm/s

 

Table 5: Third Fastest Burning Rate Mixture, Test Material: Cellulose Ratio 90:10

 

Test	Observations	Burning Time (s)	Burning Rate (mm/s)
1	The pile burned with a small clear blue flame, with some small yellow sparks and a small amount of grey smoke, leaving dark grey to black ash.	561	0.357
2	The pile burned with a small clear blue flame, with some small yellow sparks and a small amount of grey smoke, leaving dark grey to black ash.	519	0.385
3	The pile burned with a small clear blue flame, with some small yellow sparks and a small amount of grey smoke, leaving dark grey to black ash.	546	0.366
4	The pile burned with a small clear blue flame, with some small yellow sparks and a small amount of grey smoke, leaving dark grey to black ash.	505	0.396
5	The pile burned with a small clear blue flame, with some small yellow sparks and a small amount of grey smoke, leaving dark grey to black ash.	486	0.412
6	The pile burned with a small clear blue flame, with some small yellow sparks and a small amount of grey smoke, leaving dark grey to black ash.	503	0.398
Maximum burning rate = 0.412 mm/s Maximum burning rate of reference mixtures = 0.995 mm/s

Interpretation of results:

other: Not classified according to EU criteria.

Conclusions:

Under the conditions of the study the test material, manganese dioxide, was found not to have oxidising properties.

Executive summary:

The oxidising properties of the test material were investigated in a study which was conducted in accordance with the standardised guideline EU Method A.17.

Under the conditions of the study the test material was determined not to have oxidising properties as the test material/cellulose mixtures failed to propagate combustion at a rate greater than or equal to that of the barium nitrate/cellulose mixtures.

Description of key information

The substance is not an oxidiser, EU Method A.17, Atwal &Tremain (2009)

Key value for chemical safety assessment

Oxidising properties:

no

Additional information

The oxidising properties of the test material were investigated in a study which was conducted in accordance with the standardised guideline EU Method A.17.

Under the conditions of the study the test material was determined not to have oxidising properties as the test material/cellulose mixtures failed to propagate combustion at a rate greater than or equal to that of the barium nitrate/cellulose mixtures.

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 does not require classification as an oxidiser.

In accordance with the criteria for classification as defined in Annex VI, Directive 67/548/EEC (DSD), the substance does not require classification as an oxidiser.