Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Hydrolysis

Data waiving:

In accordance with REACH Annex VIII column 2, the study does not need to be conducted if the substance is readily biodegradable.

Biodegradation

Ready biodegradability:

Read-across:

A closed bottle test comparable to OECD TG 301 D under aerobic conditions was performed and after 21 days a maximum percentage of 93 % biodegradation of L-Menthol (CAS no. 2216 -51 -5) was reached in a test with an initial concentration of 0.84 mg/L. 79 % of D-Menthol was degraded in a test with an initial concentration of 2.00 mg/L aftre 28 days. Therefore, L-Menthol is considered being readily biodegradable.

A closed bottle test comparable to OECD TG 301 D under aerobic conditions was performed and after 28 days 92 % of D-Menthol (CAS no. 15356-60-2) was degraded in a test with an initial concentration of 0.84 mg/L. 76 % of D-Menthol was degraded in a test with an initial concentration of 2.01 mg/L. Therefore, D-Menthol is considered being readily biodegradable.

Inherent biodegradability:

A test on inherent biodegradation comparable to OECD TG 302 B was performed with a duration of 5 days. 95.1 % of DL-Menthol was degraded during the test period. Therefore, DL-Menthol is considered being inherent biodegradable.

Bioaccumulation:

In a bioaccumulation test, corresponding to OECD Guideline 305C, a BCF of <0.5 - 15 at 0.2 mg/L and <4.6 - 11 at 0.02 mg/L test concentration for DL-Menthol was determined with Cyprinus carpio as test organism (15 - 20 animals/concentration) within 6 weeks.

Adsorption / desorption:

The QSAR determination of the carbon partition coefficient for DL-Menthol using the model KOCWIN included in the Estimation Program Interface (EPI) Suite v4.1 revealed values of 247.9 L/kg (logKow method) and 88.15 L/kg (MCI method) for the unaffected molecule of the substance as any decomposition (e.g. hydrolysis) of the substance is not taken into account by the program.

Additional information