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Physical & Chemical properties

Oxidising properties

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Endpoint:
oxidising properties
Type of information:
other: ICSC
Adequacy of study:
supporting study
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment
Remarks:
From International Chemical Safety Cards. There is no indication that the physico-chemical data has been ‘peer reviewed’. The reference source is not indicated leading to insufficient information on the material & method used.
Guideline:
other: not mentioned
GLP compliance:
not specified
Interpretation of results:
Category 3 (oxidising solids) based on GHS criteria
Conclusions:
From ICSC no. 1041 it was concluded that magnesium nitrate (anhydrous) has oxidizing properties.
Endpoint:
oxidising solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2003
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Remarks:
Well documented study according to UN test O1 performed by trusted laboratory.
Qualifier:
according to guideline
Guideline:
other: 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)
Qualifier:
according to guideline
Guideline:
EU Method A.17 (Oxidising Properties (Solids))
GLP compliance:
no
Key result
Sample tested:
1:1 sample-to-cellulose ratio
Parameter:
mean burning time
Result:
> 300 s
Remarks on result:
other: Result is for Magnesium nitrate hexahydrate as received (UN O.1 test)
Key result
Sample tested:
4:1 sample-to-cellulose ratio
Parameter:
mean burning time
Result:
> 255 s
Remarks on result:
other: Result is for Magnesium nitrate hexahydrate as received (UN O.1 test)
Key result
Sample tested:
reference: 3:7 mixture potassium bromate + cellulose
Parameter:
mean burning time
Result:
104 s
Remarks on result:
other: UN O.1 test
Sample tested:
reference: 2:3 mixture potassium bromate + cellulose
Parameter:
mean burning time
Result:
39 s
Remarks on result:
other: UN O.1 test

UN O.1 test:

All test sample/cellulose mixtures exhibit burning times greater than those of the 3:7 and 2: 3 reference substance/cellulose mixture.

EC A.17 test:

For ratio 10/90 and 20/80 (test substance/cellulose) the burning time was 418 and 33, resp. No burning for the other ratios.

Complete combustion was never observed. Burning times for the reference mixtures: 164 -172 s.

Interpretation of results:
GHS criteria not met
Remarks:
no oxidising properties
Conclusions:
Based on both the UN O.1 test and the EC A.17 test, magnesium nitrate hexahydrate has no oxidising properties.
Endpoint:
oxidising solids
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
2007
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Remarks:
Well documented study according to UN test O1 performed by trusted laboratory.
Qualifier:
according to guideline
Guideline:
other: 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)
GLP compliance:
no
Contact with:
powdered cellulose
Key result
Sample tested:
1:1 sample-to-cellulose ratio
Parameter:
mean burning time
Result:
> 180 s
Remarks on result:
other: Result is for Magnesium nitrate hexahydrate as received
Key result
Sample tested:
1:1 sample-to-cellulose ratio
Parameter:
mean burning time
Result:
> 180 s
Remarks on result:
other: Result is for pre-treated Magnesium nitrate hexahydrate (after grinding, sieving to less than 125 µm and drying)
Key result
Sample tested:
4:1 sample-to-cellulose ratio
Parameter:
mean burning time
Result:
> 180 s
Remarks on result:
other: Result is for Magnesium nitrate hexahydrate as received
Key result
Sample tested:
4:1 sample-to-cellulose ratio
Parameter:
mean burning time
Result:
> 180 s
Remarks on result:
other: Result is for pre-treated Magnesium nitrate hexahydrate (after grinding, sieving to less than 125 µm and drying)
Key result
Sample tested:
reference: 3:7 mixture potassium bromate + cellulose
Parameter:
mean burning time
Result:
121 s
Remarks on result:
other: fastest burning time: 104 s

All test sample/cellulose mixtures exhibit burning times greater than those of the 3:7 reference substance/cellulose mixture. Based on this it was concluded that magnesium nitrate hexahydrate does not have oxidizing properties in the sense of the criteria specified in the UN RTDG.

Interpretation of results:
GHS criteria not met
Remarks:
no oxidising properties
Conclusions:
Magnesium nitrate hexahydrate (flakes as well as particles below 125 µm) does not have oxidising properties in the sense of the criteria specified in the United Nations Recommendations on the Transport of Dangerous Goods.
Endpoint:
oxidising solids
Type of information:
other: statement
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
UN numbers are assigned by the United Nations Committee of Experts on the Transport of Dangerous Goods. They are published as part of their Recommendations on the Transport of Dangerous Goods, also known as the Orange Book. These recommendations are adopted by the regulatory organization responsible for the different modes of transport and considered as a trusted source.
Qualifier:
no guideline followed
GLP compliance:
not specified
Key result
Remarks on result:
not measured/tested
Remarks:
based on transport classification

For transport, magnesium nitrate has been classified for oxidising properties.

Interpretation of results:
Category 3 (oxidising solids) based on GHS criteria
Conclusions:
Based on the transport classification, it was concluded that magnesium nitrate has oxidising properties.

Description of key information

Based on test results (UN O.1, EC A.17), Magnesium nitrate hexahydrate has no oxidising properties.  Magnesium nitrate (anhydrous) has been classified for transport as an oxidising substance (Class 5.1,O2, PG III).

Key value for chemical safety assessment

Oxidising properties:
yes

Additional information

Transport classification can be used for REACH as well.

Packaging group III equals CLP Category 3.

The oxidising properties of a solid depend on its particle size: the smaller the particles, the higher the oxidising capacity.

 

 

Justification for classification or non-classification

Based on the transport data, magnesium nitrate (anhydrous) has to be classified for the hazard 'Oxidising solid-Category 3' according to CLP Regulation (EC) No 1272/2008.

Based on UN test results, magnesium nitrate hexahydrate does not need to be classified for this hazard.

Based on its composition, the aqueous solution of magnesium nitrate containing <5% calcium nitrate and < 5% nitric acid, does not have to be classified for the hazard 'Oxidising solid-Category 3' according to CLP Regulation (EC) No 1272/2008.