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Environmental fate & pathways

Phototransformation in air

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Description of key information

The half-life for the test compound in the atmosphere based on reaction with hydroxyl radicals  was estimated using the Atmospheric Oxidation Program in EPI Suite.  A supporting study measured gas phase photodegradation and direct photolysis of a radiolabeled test compound coated on an inert support.

Key value for chemical safety assessment

Half-life in air:
95 d

Additional information

The estimated half-life for 2-nitropropane in the atmosphere based on reaction with hydroxyl radicals is 95 days using the Atmospheric Oxidation Program in EPI Suite.

In a supporting study involving a gas phase photodegradation test, 67.8% degradation of 2 -NP was observed in the test under static conditions after 24 hours. An additional experiment assessing direct photolysis of the radiolabeled test compound coated on an inert support and irradiated with light from a mercury vapor lamp filtered through pyrex glass (>290 nm wavelength) showed a half-life of approximately 0.7 days.