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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Imidazole is readily biodegradable (according to OECD criteria).

The rate constant are as follows:

Degradation rate in water:       4.7*10 -2   [d-1]1

Degradation rate in soil:         0.28 - 0.38  [d-1]2

Degradation rate in sediment: 2.31*10 -3 [d-1]3

Degradation rate in air:           1.56    [d-1]4

1 According to Regulation (EC) No 1907/2006 [European Communities 2006], RIP 3.2-2, Chapter R.16, table R.16-7, page 41

2 Determined in an OECD guideline 307 Aerobic and anaerobic transformation study in soil

3 Calculated according to  Regulation (EC) No 1907/2006 [European Communities 2006], RIP 3.2-2, Chapter R.16, equitation R.16-19, page 43

4 Calculated from atmospheric half-life estimated by AOPWIN v1.92 (see chapter