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Physical & Chemical properties

Vapour pressure

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Description of key information

As the test item is instable in contact with air, the vapour pressure of the stable oxidised form Indigo was determined to be < 3.5 x 10E-5 Pa at 100°C. 

Key value for chemical safety assessment

Additional information

The test substance is synthesized and handled as an aqueous potassium hydroxide solution only under inert gas atmosphere. It is instable as solid material on air and oxidises rapidly to indigo CAS 482-89-3. Data on indigo is presented below.

Indigo: < 3.5 x 10E-5 Pa at 100°C