Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Biodegradation in water: screening tests

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

The following key study was provided to fulfil the data requirement:
Hanstveit Ir. R. (2003) 1,3,2-Dioxastannepin-4,7-dione, 2,2-dibutyl- (CAS # 78-04-6, Dibutyltin maleate, DBTM): Determination of the ready biodegradability in a Manometric Respiration Test. Testing laboratory: TNO, Project Organisation, Ecotoxicology, Utrechtseweg 48, P.O. Box 360, 3700 AJ Zeist, The Netherlands. Owner company: Organotin Environmental Programme (ORTEP) Association, Stabilizer Task Force. Report No.: V4017/01. Report date: 2003-09-24
The biodegradation of dibutyltin maleate was determined in a study performed in compliance with GLP and to the methods OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test) and EU Method C.4-D (Determination of the "Ready" Biodegradability - Manometric Respirometry Test). The study was considered reliable and adequate for assessment and accordingly assigned a reliability score of 1. The percentage degradation of 1,3,2-dioxastannepin-4,7-dione, 2,2-dibutyl- after 28 days of incubation was approximately 3% in a manometric respiration test at a test substance concentration of 37.7 mg.l-1, calculated from the Theoretical Oxygen Demand (ThODNH3) (1.38 mg O2.mg-1) of test substance. The biodegradation of 1,3,2-dioxastannepin-4,7-dione, 2,2-dibutyl- did not exceed the pass level of 60% ThODNH3 within 28 days and, therefore, is classified as not readily biodegradable.

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

The key study Hanstveit Ir. R. (2003), was performed in compliance with GLP and to the guidelines OECD 301 F and EU Method C.4-D. The study was considered highly reliable and adequate for assessment and therefore assigned a reliabiltiy score of 1. Under the conditions of the test dibutyltin maleate was found to not be readily biodegradable.