Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Toxicity to microorganisms

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

The determination of the inhibition of respiration of activated sludge exposed to the test item n-HEPTANAL was performed following the described in the OECD guideline 209.
n-HEPTANAL showed only a slight effect on the respiration of activated sludge. In the conditions of the test, EC50 – 3h and EC10 – 3h are respectively equal to 580 mg/L and 110 mg/L.

Key value for chemical safety assessment

EC50 for microorganisms:
580 mg/L
EC10 or NOEC for microorganisms:
110 mg/L

Additional information

The purpose of this study was to determine the effect of heptanal on bacteria according to the OECD guideline 209 “Activated Sludge, Respiration Inhibition Test”.The effect is assessed by measuring the micro-organisms respiration rate on a sample of activated sludge during an incubation period of 3 hours. Heptanalhowed only a slight effect on the respiration of activated sludge in the conditions of the test. EC50– 3h was estimated at 580 mg/L and the EC10 was estimated at 110 mg/l.