Registration Dossier

Diss Factsheets

Environmental fate & pathways

Phototransformation in water

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Glutaraldehyde is photolytically stable in aqueous test solutions.

Key value for chemical safety assessment

Additional information

The photolysis of C14-labelled glutaraldehyde was investigated according to EPA Guideline 161-2 (ABC Laboratories 32739). The test duration was 20 days, which is equivalent to 36 days of natural sunlight (12 hours/day) in the sensitized acetone system and to 34 days of natural sunlight in the sensitized acetonitrile and the unsensitized systems.

Results revealed a first order photolysis rate. Under sensitized conditions equivalent to 36 days of natural sunlight (12 hours/day; sensitized acetone system) and to 34 of natural sunlight (12 hours/day; sensitized acetonitrile system), glutaraldehyde was subjected to photolytic degradation with a half-life of respectively 18 (acetone) and 49 days (acetonitrile); no photodegradation was observed under darkness. Under non-sensitized conditions, no photodegradation of glutaraldehyde occurred.

In conclusion, glutaraldehyde is photolytically stable in aqueous, unsensitized test solutions.