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Description of key information

The substance directly hydrolyses when coming into contact with water. 

Key value for chemical safety assessment

Additional information

No study according to OECD 111 was performed for N-Butylpyridinium heptachloroaluminate (CAS 67226 -45 -3) because of the extreme instability of the test item in water (Huber, 2014). The present test item is an ionic liquid that consist of an N-butylpyridinium cation and a heptachloroaluminate anion. According to literature systems with chloroaluminate anions must be classified as extremely hygroscopic and labile towards hydrolysis. The aluminium (III) halides are extremely sensitive to even the smallest amounts of water. In the literature it is described that when water is added to chloroaluminate ionic liquid of any composition, an exothermic reaction occurs with the evolution of HCI. This reaction produces oxide- and proton-containing species, both of which can interact with other solutes.