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Classification & Labelling & PBT assessment

PBT assessment

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PBT assessment: overall result

Reference
Name:
Dipotassium oxide
Type of composition:
boundary composition of the substance
State / form:
solid: bulk
> 95 - < 100 % (w/w)
Reference substance:
Composition 1
Reference substance:
Composition 1
This impurity is considered relevant for the classification and labelling of the substance
Reference substance:
Composition 1
This impurity is considered relevant for the classification and labelling of the substance
Reference substance:
Composition 1
This impurity is considered relevant for the classification and labelling of the substance
PBT status:
the substance is not PBT / vPvB
Justification:

    

As Potassium oxideis an inorganic substance, no PBT or vPvB assessment has to be performed in accordance with Annex XIII of REACH.

 

According to REACH regulation 1907/2006 PBT and vPvB criteria shall not apply to inorganic substances. Thus, Potassium oxide is not subject to PBT/vPvB assessment.

 

Persistence

Potassium oxide will rapidly dissolve and dissociate in water. When water is added to Potassium oxide, Potassium hydroxide is produced. Therefore, Potassium oxide does not fulfill the P criterion.

 

Bioaccumulation

Bioaccumulation is not relevant for Potassium oxide, therefore, Potassium oxide does not meet the B criterion of the PBT criteria.Potassium oxide has not bioaccumulation potential.

 

Toxicity

The lowest reported LC50 for freshwater and marine organisms suggests and to be above the cut-off value of 0.1 mg/L.Based on the data with other potassium compounds, it could be concluded that where the long-term NOECs for marine or freshwater organisms are above the cut-off value of 0.1 mg/L.

Potassium oxide not classified as carcinogenic (Category 1 or 2), mutagenic (Category 1 or 2), or toxic for reproduction (Category 1, 2 or 3). There is no evidence of chronic toxicity, as identified by the classifications: T, R48, or Xn, R48 according to Directive 67/548/EEC. Therefore Potassium oxidedoes not meet the PBT criteria for toxicity.

 

Summary and overall Conclusions on PBT or vPvB Properties

Potassium oxide does not fulfill the criteria for persistence, bioaccumulation and toxicity. Therefore, Potassium oxide is not considered a PBT or a vPvB substance.