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Description of key information

The calculated half life for 1,4 diaminobutane is 0.162 days or 1.939 hours based on annually averaged daily 12 hr daylight hydroxyl concentration of 1.56E06 molecules (OH-radicals)/cm3 at 25 deg C. Source: QSAR program Atmospheric Oxidation Program (AOPWIN) v1.92 from the US-EPA (2000).
Based on data of DSM (O. Poorter, 2002) the substance, when released into the air, reacts with carbondioxide to form a salt which is a solid substance.
Since the substance is readily biodegradable, phototransformation in water is expected not to be a relevant mechanism.
Since the substance is readily biodegradable, phototransformation in soil is expected not to be a relevant mechanism.

Key value for chemical safety assessment

Half-life in air:
0.162 d
Degradation rate constant with OH radicals:
1 560 000 cm³ molecule-1 d-1

Additional information