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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Classification & Labelling & PBT assessment

PBT assessment

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Administrative data

PBT assessment: overall result

PBT status:
the substance is not PBT / vPvB


1,3-Bis (4-hydroxy benzoyl) benzene is considered as hydrolytical stable and is not ready biodegradable. Therefore, based on the data currently available, 1,3-Bis (4-hydroxy benzoyl) benzene is considered as potentially persistent in the environment as a worst-case assessment.


The measure log Kow of 1,3-Bis (4-hydroxy benzoyl) benzene was determined to be 2.4, and hence biocaccumulation is not expected. Based on a Log Kow<= 4.5, the substance is considered not to fulfil the B or vB criteria for PBT assessment.


1,3 -Bis (4 -hydroxy benzoyl) benzene shows no signs of toxicity in any of the available acute and chronic aquatic toxicity test at its limit of solubility. Therefore therefore 1,3-Bis (4-hydroxy benzoyl) benzene does not fulfill the criteria for aquatic toxicity.

1,3-Bis (4-hydroxy benzoyl) benzene is not classified as being a CMR and there is no evidence that it is chronically toxic towards mammals. Therefore 1,3-Bis (4-hydroxy benzoyl) benzene is not assigned as toxic.

Overall conclusion on PBT assessment

Although the criteria for P or vP are met, 1,3-Bis (4-hydroxy benzoyl) benzene is not B/vB or T. Therefore, overall the substance may be considered as not PBT/vPvB.