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Physical & Chemical properties

Oxidising properties

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Reference
Endpoint:
oxidising solids
Type of information:
other: UN Dangerous Goods List
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Justification for type of information:
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:
according to guideline
Guideline:
other: UN Test O.1 for oxidising solids
GLP compliance:
not specified
Key result
Sample tested:
other: Calcium nitrate
Parameter:
other: Not indicated
Remarks on result:
other: Oxidising
Key result
Sample tested:
other: Calcium nitrate tetrahydrate
Parameter:
other: Not indicated
Remarks on result:
other: Not oxidising

Based on all information, it is concluded that the UN classifcation for anhydrous calcium nitrate is '5.1, PG III' . Furthermore it can be concluded that calcium nitrate tetrahydrate does not need to be classified as an oxidising solid.

Transport classification for oxidising properties can be used for REACH as well; Packaging group III equals CLP Category 3.

Interpretation of results:
other: Oxidising based on the UN transport classification
Conclusions:
Based on the UN transport classification, it was concluded that calcium nitrate (anhydrous) is an oxidising solid and calcium nitrate tetrahydrate is not an oxidising solid.

Description of key information

Based on the transport classification Class 5.1 PG III (UN 1454), it was concluded that calcium nitrate anhydrous is an oxidising substance.

Key value for chemical safety assessment

Oxidising properties:
yes

Additional information

Dangerous Good List (2017):

UN 1454 -Calcium nitrate (anhydrous) - Hazard class 5.1 (Oxidising substance), PG III.

Transport classification for oxidising properties can be used for REACH as well: Packaging group III equals CLP Category 3.

Because calcium nitrate tetrahydrate is not mentioned in the Dangerous Good List and consists for about 30% of crystal water, it is concluded that the tetrahydrate form of calcium nitrate is not an oxidising solid. This is confirmed by the Guidance on the application of the CLP criteria (version 5.0, June 2017) in which in chapter 2.14.6.2 has been indicated that calcium nitrate tetrahydrate does not fulfil the classification criteria for oxidising solids.

In general, 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, calcium nitrate (anhydrous) has to be classified for the hazard 'Oxidising solid-Category 3' according to CLP Regulation (EC) No 1272/2008. Calcium nitrate tetrahydrate does not need to be classified as an oxidising solid.