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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The test item hexanal (+ 0,05 %, alpha-Tocopherol as stabilizer) was tested under aerobic conditions in the Manometric Respirometry Test following OECD 301F / EU C.4-D using a concentration of 37 mg test item/L (equivalent to a theoretical oxygen demand of 99.95 mg O2/L). Activated sludge was used as inoculum. The test was left running for 28 days. All validity criteria were met. The positive control reached the pass level of 60 % on day 3 (criterion: < 14). 

The following data could be determined for the test item hexanal 0,05 % TOCO:


10-day-window: day 1–11

degradation at the end of 10-day-window: 63 %

degradation at the end of the test: 69 %


Therefore, when applying the 10-day-window, hexanal is classified as readily biodegradable following OECD 301F/EU C.4-D.

Additional information