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Physical & Chemical properties

Oxidising properties

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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:
UN Manual of Tests and Criteria: Test O.1 (Test for oxidizing solids)
Deviations:
no
GLP compliance:
no
Contact with:
other: 1) sawdust 2) fibrous cellulose
Sample tested:
reference: 3:7 mixture potassium bromate + cellulose
Parameter:
mean burning time
Result:
106 s
Remarks on result:
other: Result according to the current method.
Sample tested:
reference: 2:3 mixture potassium bromate + cellulose
Parameter:
mean burning time
Result:
61 s
Remarks on result:
other: Result according to the current method.
Key result
Sample tested:
1:1 sample-to-cellulose ratio
Parameter:
mean burning time
Result:
254 s
Remarks on result:
other: Combustion with little flames.
Remarks:
Result according to the current method.
Key result
Sample tested:
4:1 sample-to-cellulose ratio
Parameter:
mean burning time
Remarks on result:
mixture does not ignite and burn
Remarks:
Result according to the current method.

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

Yttrium trinitrate

4/1

-

-

-

-

Combustion is initiated near the wire but the reaction stops when the power is turned off; incomplete reaction

 

Yttrium trinitrate

1/1

-

-

-

-

Combustion is initiated near the wire but the reaction stops when the power is turned off; incomplete reaction

Ammonium persulfate

1/1

40

34

41

38

 

 

Combustion is initiated near the wire but the reaction stops when the power is turned off. The reaction is incomplete.

Therefore, yttrium trinitrate is not considered as an oxidising material according to the UN method in place in 1995.

2) Test according to the current UN method (see test result box):

Sample

Ratio sample / cellulose

Burning time (s)

Observations

N° 1

N° 2

N° 3

N° 4

N° 5

Average

Yttrium trinitrate

4/1

-

-

-

-

-

-

No combustion

Yttrium trinitrate

1/1

243

348

171

241

266

254

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 yttrium trinitrate / cellulose in the ratio 4/1 does not burn.
The mixture of yttrium trinitrate / cellulose in the ratio 1/1 burns with little flames. All the burning times are higher than those of the reference mixture.

According to these results, yttrium trinitrate is not considered as oxidiser and should not be classified under Division 5.1.
Interpretation of results:
GHS criteria not met
Conclusions:
Yttrium trinitrate gave a negative result according to the UN method in place in 1995 and according to the current method.
Yttrium trinitrate is not considered as an oxidiser.

Description of key information

Lodel (1995; Klimisch 1) studied the oxidising properties of yttrium trinitrate according to UN Recommendations on the Transport of Dangerous Goods (Manual of Tests and Criteria, Third edition, 1995). The substance was observed not to be oxidising.

Key value for chemical safety assessment

Oxidising properties:
no

Additional information

Justification for classification or non-classification

Yttrium trinitrate was demonstrated not to have oxidising properties and thus needs not to be classified for this endpoint according to the CLP criteria.