Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

If released to air acetylacetone will be present as a vapor in the atmosphere due to its high vapout pressure. It will be degraded by reaction with hydroxyl radicals; the half-life for this reaction in air is estimated to be about 14 days. Removal from air via rain may occur. Acetyl acetone does not contain chromophores that absorb at wavelengths > 290 nm and therefore is not degraded through photolysis by sunlight. If released to soil, acetyl acetone is expected to have very high mobility based upon the low Koc that could not be measured. Volatilization from soil may occur based upon an estimated Henry's Law constant of 2.3X10-6 atm-cu m/mole. Acetylacetone may also volatilize from dry soil surfaces based upon its vapour pressure. Biodegradation of acetyl acetone is expected to be an important process in both soil and water. If released into water, acetyl acetone is not expected to adsorb to suspended solids and sediment based upon the estimated Koc. An estimated BCF of 3.2 suggests the potential for bioconcentration in aquatic organisms is low. Acetyl acetone is not expected hydrolize in the environment due to the lack of functional groups that may hydrolyze under environmental conditions [modified from HSDB].