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Description of key information

The C12-14 amine oxide has a low vapour pressure and is always manufactured as an aqueous solution. Atmospheric exposure to the substance will be low. The estimated half-life for photodegradation in air is < 5.2 h and hence the substance will have no effect on stratospheric ozone. The substance is not a potential greenhouse gas.

Key value for chemical safety assessment

Half-life in air:
5.2 h
Degradation rate constant with OH radicals:
24 cm³ molecule-1 s-1

Additional information

Photodegradation has been estimated using AOPWIN v1.91. C10 AO has a rate constant of 24x10-12cm3/molecule-sec and a half-life of 5.2h. C16 AO has a rate constant of 32 x10-12cm3/molecule-sec and a half-life of 3.9h. Therefore, the half-life of C12-14 AO will be <5.2h.

Atmospheric risk: The active substance has a low vapour pressure and is always manufactured as an aqueous solution, volatility is expected to be low due to the large aqueous concentration and emissions to the air compartment are expected to be low.

Global warming: Amine oxides show no absorption in the so-called atmospheric window (800 – 1200 nm) and are therefore, according to the 2ndrevision of the TGD [EC (2003)] not a potential greenhouse gas.

Stratospheric ozone: According to the 2ndrevision of the TGD [EC (2003)] ozone depletion potential values approach zero for molecules with an atmospheric half-life of less than one year. The C12-14 AO has an estimated half-life of <5.2 hours and is therefore predicted to have no effect on stratospheric ozone.

Tropospheric ozone: According to the 2ndrevision of the TGD [EC (2003)] there is at present no procedure available to estimate the effect on tropospheric ozone if only the basic characteristics of the substance are known.

Acidification: Due to the low expected emissions to the air compartment, it is not expected that this will have an effect on acidification of the receiving soil or surface water.