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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Additional information

No information on the major component (ca. 86 %) are available, but data of similar substances with a defined number of carbons and insaturation are available or can be calculated.

In an experimental ready biodegradability CO2 Evolution Test (OECD Guideline 301 B) Amides, C8-18 (even numbered) and C18-unsatd., N,N-bis(hydroxyethyl), CAS 68155-07-7 is resulted readily biodegradable after 28 days, and the same result on biodegradability was found in a manometric respirometry test (EU Method C.4-D), except that in this case it failed the 10-day window, condition not applicable to UVCB substance.

The 10 day window does not apply to TG 301 C or if the test substance represents a mixture of homologous compounds e.g. technical surfactants

(Rif. ECHA Guidance R.7b).1

In an ready biodegradability Closed Bottle Test (OECD Guideline 301 D), amides, C12-18(even-numbered) and C18(unsatd), N,N-bis(hydroxyethyl) is considered to be readily biodegradable under the test condictions (84 % at 2 mg/L and 71 % at 5 mg/L.2

Amides, C16-18 and C18-unsatd., N,N-bis(hydroxyethyl), CAS 68603-38-3 is considered ready biodegradable, after 28 days, under the test condition of an OECD 301D (closed bottle) test. This amide was also exposed to the activated domestic sewage sludge according to the OECD 301B.

The test substance attained 62% degradation after 28 days but did not meet the 10-d window validation criterion.

As indicated before, the 10 day window does not apply if the test substance represents a mixture of homologous compounds e.g. technical surfactants

(Rif. ECHA Guidance R.7b).3

The prediction usingBIOWIN v 4.10 indicates a readily biodegradability for all substances.4

In addition, Amides, soya, N,N-bis(hydroxyethyl),CAS 68603-38-3 was also tested according to the Coupled Units test, as described in Directive 87/302/EEC. It was considered to be ultimately biodegradable.

References:

1ECHA Registration Dossier, Amides, C8-18 (even numbered) and C18-unsatd., N,N-bis(hydroxyethyl), CAS 68155-07-7;

2ECHA Registration Dossier, Amides, C12-18(even-numbered) and C18(unsatd.), N,N-bis(hydroxyethyl), CAS 90622-74-5;

3ECHA Registration Dossier, Amides, C16-18 and C18-unsatd., N,N-bis(hydroxyethyl), CAS 68603-38-3;

4BIOWIN v4.10 (EPI Suite v.4.00 by EPA);