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Physical & Chemical properties

Oxidising properties

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Reference
Endpoint:
oxidising liquids
Data waiving:
study technically not feasible
Justification for data waiving:
other:

It can be concluded that sulfuric acid and its salts are not oxidising. which is in agreement with common findings.

Interpretation of results:
other: no oxidising properties
Remarks:
Migrated information
Conclusions:
It can be concluded that sulfuric acid and its salts are not oxidising. which is in agreement with common findings.
Executive summary:

Sulfuric acid and its salts are not oxidising

Description of key information

Sulphuric acid does not meet the criteria as an oxidiser  

Key value for chemical safety assessment

Oxidising properties:
no

Additional information

Sulphuric acid does not meet the criteria as an oxidiser

Justification for classification or non-classification

Sulphuric acid (H2SO4):

 

In sulphuric acids and its salts, the sulphur atom has the oxidation number +6.

Sulphurous acid (H2SO3) contains sulphur with the oxidation number +4; it has reducing properties and is readily oxidised to sulphuric acid. This behavior is reflected in the electrochemical potential:

 

SO4 2- + H2O + 2 e -> SO3 2- + 2 OH -        E = -0,92 V

 

 

Sulphates are essentially the most stable form of sulphur-based salts, and this is why such minerals are frequently found in nature.

 

The UN O.2 test as described in the UN Manual of Tests and Criteria is based on the reaction of a test compound towards cellulose in comparison to a reference oxidiser. Concentrated sulphuric acid reacts exothermally with cellulose, however, the reaction is not an oxidation but rather a sulphonation and desiccation reaction.

 

Therefore, it can be concluded that sulphuric acid and its salts are not oxidising. which is in agreement with common findings.

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