Potassium vanadium trioxide

Flammability

Description of key information

Potassium vanadium trioxide is not considered as highly flammable.
Potassium vanadium trioxide is not pyrophoric.
Potassium vanadium trioxide does not emit flammable gases in contact with water.

Key value for chemical safety assessment

Flammability:

non flammable

Additional information

Flammability of solids

In accordance with Regulation (EC) No 1907/2006, Annex XI, Section 1, testing of flammability is not considered to be required for potassium vanadium trioxide as this is a form of vanadium that is already oxidized and has an oxygen content of 35 %. Furthermore, testing of flammability is not considered to be required for inorganic oxides in which the cation is in its highest possible oxidation state and which therefore are incapable of further reaction with oxygen. This substance can thus be designated as non-flammable. (Guidance on information requirements and chemical safety assessment Chapter R.7a: Endpoint specific guidance, section R.7.1.10.3). In addition, long-term industrial experience in handling shows that potassium vanadium trioxide is not flammable.

Pyrophoricity

In accordance with Regulation (EC) No 1907/2006, Annex XI, Section 1, testing for pyrophoric properties of solids is not considered to be required, since potassium vanadium trioxide is stable at ambient temperature. It also does not contain any chemical groups that might lead to spontaneous ignition a short time after coming in contact with air at room temperature (ca. 20 °C). Furthermore, long-term industrial experience in handling shows that potassium vanadium trioxide does not ignite (spontaneously) (i.e. the autoignition temperature is not below room temperature) in contact with air.

Flammability in contact with water

In accordance with Regulation (EC) No 1907/2006, Annex XI, Section 1, testing of flammability in contact with water is not considered to be required, because potassium vanadium trioxide does not contain groups that might lead to a reaction with water or damp air, leading to the development of dangerous amounts of gas or gases which may be highly flammable. Recent experimental testing for water solubility has also not reported any formation of gases. Furthermore, long-term industrial experience in practical handling of potassium vanadium trioxide shows that it does not react with water and will not ignite with water or humid air.

Justification for classification or non-classification

Potassium vanadium trioxide does not need to be classified for physico-chemical properties according to Directive 67/548 EEC and CLP Regulation (EC) No 1272/2008:

flammability is considered non-relevant based on chemical structure and lack of functional groups;

explosive properties are considered non-relevant based on lack of functional groups;

oxidising properties are considered non-relevant based on the chemical structure and oxygen content.