Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Soybean oil, epoxidised is considered to be readily biodegradable. This was proven in a study conducted by Dr. A.V. Schulthess in 1988 using OECD guideline 301B.

A ready biodegradability test was conducted on TK 11278 (otherwise known as Reoplast 39 or epoxidised soybean oil)using bacteria from a sewage treatment plant. Aniline was used as a reference substance.

After 28 days:

The biodegradation calculated as percentage of measured amount of CO2 over the theory was:

10 mg test substance/L = 79 % in 28 days

20 mg test substance/L = 92 % in 28 days

The % degradation (% ThCO2 formation) exceeded 10% within 2 to 3 days for both concentrations of the test material and subsequently exceeded the 60% pass level within the 10 day window.

Therefore,epoxidised soybeanis readily biodegradable.

 

Read across to a study result from an investigation using a similar material is justified for members of the Epoxidised Oils and Derivatives group. Four epoxidised oils and esters (linseed, soybean,9-octadecanoate propylene glycol ester and  2-ethylhexyl tallate ester ETP). The C14-C22, 2-ethylhexylesters are listed as similar products on the market to ETP based on fatty acids from other naturally occurring fatty acids

This group of epoxies are identified as sharing common structural and functional similarities, recognised in an OECD SIDS review as a single category, and therefore justifying read-across between data for different members of the group. Consequently data sharing between ESBO epoxidised soybean oil, ELO epoxidised Linseed oil and ETP epoxidised 2ethylhexyl tallate and fatty acids, C14-C22, 2-ethylhexylesters, epoxidised is commonly utilised in the preparation of this dossier.

Read-across bridges are used for members of the EOD group where appropriate, is justified based on similar toxicity profiles and structural and functional similarities.

Additional information