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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Classification & Labelling & PBT assessment

PBT assessment

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Administrative data

PBT assessment: overall result

PBT status:
the substance is not PBT / vPvB

The PBT Assessment for 6-methyl-2-oxoperhydropyrimidin-4-yl urea is based on the criteria set out in the “Guidance on information requirements and chemical safety assessment, Chapter R.11: PBT Assessment” (ECHA, 2012).



6-methyl-2-oxoperhydropyrimidin-4-yl urea is readily biodegradable according to a study following OECD guideline 301b (85.6% (ThCO2) after 28 d). Thus, the test substance does not meet the screening criterion for persistency and it is not considered to be P or vP.



6-methyl-2-oxoperhydropyrimidin-4-yl urea has a log Kow -1.34 (OECD 107).

Thus, the substance does not meet the screening criterion for bioaccumulation and is not considered to be B or vB.



Long-term toxicity tests for 6-methyl-2-oxoperhydropyrimidin-4-yl urea are not available. However, an acute toxicity of the substance to aquatic organisms (fish, Daphnia, algae) was not determined. Furthermore the substance is not classified according to Directive 67/548/EEC and Regulation (EC) No. 1272/2008. Thus, the criteria set out in Annex XIII of Regulation (EC) No. 1907/2006 are not met and the substance is considered to be not T.