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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Adsorption / desorption

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Administrative data

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Endpoint:
adsorption / desorption
Remarks:
adsorption
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
other information
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: Scientifically accepted method, but EPI Suite not validated for organic salts
Principles of method if other than guideline:
calculated with PCKOC (v1.66)
Media:
soil
Type:
Koc
Value:
1.09
Type:
log Koc
Value:
0.04
Endpoint:
adsorption / desorption: screening
Type of information:
calculation (if not (Q)SAR)
Remarks:
Scientifically acceptable calculation method
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
accepted calculation method
Reason / purpose for cross-reference:
read-across source
Qualifier:
no guideline followed
Principles of method if other than guideline:
Calculation method determining the Koc for charged molecules.

GLP compliance:
no
Type of method:
other: calculation of log Koc for ionized molecule
Media:
soil/sewage sludge
Type:
Koc
Value:
31 L/kg
Type:
log Koc
Value:
1.49 L/kg

The data refer to the charged molecule.

Validity criteria fulfilled:
not applicable
Conclusions:
The Koc and Log Koc of formic acid were calculated to be 31 and 1.49 respectively.
Executive summary:

Based on a Log Pow value of -0.46 and a pKa value of 3.70, the Koc and Log Koc of formic acid were reliably calculated to be 31 and 1.49, respectively (Franco and Trapp, 2008; BASF SE, 2009).

Endpoint:
adsorption / desorption: screening
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because the substance has a low octanol water partition coefficient and the adsorption potential of this substance is related to this parameter
the study does not need to be conducted because the substance and its relevant degradation products decompose rapidly

Description of key information

Adsorption to the solid soil phase is not expected.

Key value for chemical safety assessment

Additional information

In accordance with column 2 of REACH Annex VIII, the study does not need to be conducted since calcium diformate is readily biodegradable (read across: Na formate; KM Lab, 1998) and has a low potential for adsorption due to a very low octanol-water partition coefficient (log Kow <-1.8; read across: Na formate; Perstorp, 2009).

A read across was performed to formic acid in order to have a reliable value for the calculation of PNECsed and PNECsoil via the equilibrium partitioning method.

The Koc and logKoc of the dissociated, charged form at realistic environmental pH values was calculated by using the pKa (= 3.70) and the logPow of the uncharged molecule (= -0.46) for a corrected logKoc according to Franco et al. (2008). For the formate ion which will be present at environmental relevant pH values, slightly higher adsorption rates were estimated (Koc = 31, log Koc = 1.49) (BASF SE, 2009).