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Environmental fate & pathways

Phototransformation in air

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Description of key information

Phototransformation in air is no requirement under Reach.

Key value for chemical safety assessment

Additional information

Generally, EDTA is used in aqueous solutions. There would be no emission into the atmosphere pointing out the very low vapour pressure of the substance. EDTA emission to the atmosphere could appear in dust form during production [EU Risk Assessment, 2004].

Based on a calculation according to AOPWIN v1.92, edetic acid (EDTA) is indirectly photodegraded by reaction with hydroxyl radicals in the atmosphere with a half-life (t1/2) of about 2.12 hours taking into account a 24-h day and a mean OH radical concentration of 0.5E06 radicals per cm³ [BASF AG, 2007].