Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Biodegradation in water: screening tests:

- study conducted according to OECD guideline 301F, GLP, RL1, readily biodegradable

Hydrolysis:

- not necessary because the substance is readily biodegradable

Adsorption/desorption:

- no test necessary: the substance exhibits a low logKow (-2.5) and therefore adsorption is not expected.

Additional information

For the assessment of biodegradability of alpha methyl glucoside a GLP and OECD compliant study is available.

The biodegradation of the test item after 28 days of incubation in the static test was found to be 86 % (SD = 3.5 %) and 83 % (SD = 2.4 %) in the assays with 100 mg/L and 48 mg/L, respectively. The biodegradation within the 10-day-window was 72 % and 81 % in the assays with 100 mg/L and 48 mg/L, respectively. The 10-day-window started at day 2, independent from test item concentration.

The biodegradation of the item mixture in the toxicity control was found to be 71 % after 14 days of incubation. Thus, the demanded threshold value of 25 % is exceeded and the test item can be identified as non-toxic in a ready biodegradability test. The reference item sodium benzoate was degraded to 85 % within the first 14 days.

Therefore the substance was determined to be readily biodegradable in aerobic aqueous conditions.

Based on the results of the biodegradability test, a test for hydrolysis is scientifically not justified.

Due to the low partition coefficient of -2.5 adsorption is not expected, thus, a test for adsorption is scientifically not justified.