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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Bioaccumulation: aquatic / sediment

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Administrative data

Link to relevant study record(s)

Description of key information

There is no bioaccumulation data for EC 434-280-4. However, conducting a study is not technically possible due to rapid dissociation into the starting materials. Therefore, each of the starting materials (same as the dissociation products) are evaluated for their bioaccumulation potential. The constituent with the highest BCF value is adopted as the key value, which is a BCF of 1200 (dimensionless) for (Z)-octadec-9-enylamine (CAS 112-90-3).


 


Following is a summary of the BCF values and their source for each of the 4 dissociation products:


 



  1. (Z)-octadec-9-enylamine (CAS 112-90-3): BCF of 1200 is assigned based on an OECD 305 study assessed in the ECHA Committee for Risk Assessment Annex I background document to the opinion proposing harmonized classification and labelling at community level of (Z)-octadec-9-enylamine (December, 2011)

  2. Dibutyl hydrogen phosphate (CAS 107-66-4):

    1. Log Kow = 0.57 (below the screening criteria)

    2. BCF < 6.7 (OECD 305C with common carp)



  3. Butyl dihydrogen phosphate (CAS 12788-93-1):

    1. Log Kow = -0.3 (below the screening criteria

    2. BCF of 3.3 (OASIS Catalogic BCF base-line model DP v.02.07)



  4. O,O-dihexyl hydrogen dithiophosphate (CAS 78-64-8; AKA Di-n-hexyl dithiophosphoric acid): BCF of 46.8 (OASIS Catalogic BCF base-line model DP v.02.07)


 


The OASIS Catalogic BCF base-line model DP v.02.07 was used for estimating bioaccumulation potential to account for the ionization potential of butyl dihydrogen phosphate and dihexyl hydrogen dithiophosphate. The DP model explicitly estimates the ionization by taking into account Log D/P where D is the distribution coefficient of neutral and ionized species in octanol/water and P is the partition coefficient in octanol/water. D was calculated using ACDLabs software (v.12). The BCF was predicted at multiple environmental pHs, including 4, 7, and 9. In addition, the classic BCF-base line model (v.05.12) was also used to estimate BCF for comparison. Based on domain results (100% in domain) and confirmation of BCF estimates with analog alkyl phosphate esters and dialkyl dithiophosphate esters that have data, the predictions are considered highly reliable.


See the attached for weight of evidence for details and references on the bioaccumulation potential.

Key value for chemical safety assessment

BCF (aquatic species):
1 200

Additional information