Neodymium trinitrate

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Finished on 29 MAY 1995

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: UN Recommendations on the Transport of Dangerous Goods (Manual of Tests and Criteria, Third edition, 1995)

Deviations:

no

Principles of method if other than guideline:

Test described in the United Nations Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, third revised edition, test O.1: Test for oxidizing solids (section 34.4.1). Also known as the conical pile test.

GLP compliance:

no

Contact with:

other: sawdust or cellulose

Key result

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

mean burning time

Remarks on result:

mixture does not ignite and burn

Key result

Sample tested:

1:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

195 s

Sample tested:

reference: 3:7 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

106 s

Sample tested:

reference: 2:3 mixture potassium bromate + cellulose

Parameter:

mean burning time

Result:

61 s

Sample tested:

reference: 3:2 mixture potassium bromate + cellulose

Parameter:

mean burning time

Remarks on result:

not measured/tested

Remarks:

The test substance/cellulose mixtures in ratios 4/1 and 1/1 either did not burn, or gave a mean burning time longer that the reference substance/cellulose mixtures in ratios 3/7 and 2/3, so that it was no needed to test the reference substance/cellulose mixture in ratios 3/2.

The data presented in the above table entitled "Test results (Oxidising solids)" are the ones obtained in the test according to the current UN method (see point 2 below).

 

1) Test according to the UN method in place in 1995:

 

Sample	Ratio sample / sawdust	Burning time (s)				Observations
		N°1	N°2	N°3	Average
Neodymium trinitrate	4/1	-	-	-	-	Burning started when the flame was brought in contact with the pile, but stopped immediately after the cut off of the flame. An incomplete reaction is observed.
Neodymium trinitrate	1/1	380	484	410	425	Burning on the surface of the pile (probably with oxygen from the air)
Ammonium persulfate	1/1	40	34	41	38

 

 The lowest mean burning time obtained for the mixture neodymium trinitrate/sawdust (ratio 1:1) is more than that of the mixture with ammonium persulphate. Therefore, neodymium trinitrate is not considered as an oxidizing material according to the UN method in place in 1995.

 

2) Test according to the current UN method:

 

Sample	Ratio sample / cellulose	Burning time (s)						Observations
		N° 1	N° 2	N° 3	N° 4	N° 5	Average
Neodymium trinitrate	4/1	-	-	-	-	-	-	No burning was observed
Neodymium trinitrate	1/1	234	155	188	177	222	195	Combustion with little flames
Potassium bromate	3/7	113	105	102	107	103	106
Potassium bromate	2/3	85	60	60	46	52	61

 

The mixture of neodymium trinitrate / cellulose in the ratio 4 / 1 does not burn.
The mixture of neodymium trinitrate / cellulose in the ratio 1 / 1 burns with little flames. After the test, there are numerous incandescent spots within the pile. The burning times are higher than those of the reference mixture.

According to these results, neodymium trinitrate is not considered as oxidizer and should not be classified under Division 5.1.

Interpretation of results:

GHS criteria not met

Conclusions:

Neodymium trinitrate gave a negative result according to the UN method in place in 1995 and a negative result according to the current method.
Neodymium trinitrate is not considered as an oxidizer.

Description of key information

Neodymium trinitrate was observed not to be oxidising.

Key value for chemical safety assessment

Oxidising properties:

no

Additional information

An experimental non-GLP compliant study performed in accordance with UN N.1 method was flagged as a key study and assigned a Klimisch score of 1. It revealed that neodymium trinitrate has no oxidising properties.

Justification for classification or non-classification

Neodymium trinitrate was tested not to have oxidising properties and needs thus not to be classified for this endpoint according to CLP criteria.