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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The adsorption coefficient Koc of FAT 41024/B was estimated to be 22430 or higher. This means that FAT 41024/B is classified as immobile in soils.

The estimation was performed based on a water solubility of below 0.051 mg/l (RCC Project 722316) using regression equations (Lyman, Reehl, Rosenblatt: Handbook of Chemical Property Estimation Methods, 1990) relating the Koc with the water solubility. Furthermore, the molecular weight of FAT 41024/B, i.e. 546.9 g/mol was used.

Regression I: log Koc = -0.55 log S + 3.64 (S in mg/l)

Regression II: log Koc = -0.54 log S + 0.44 (S in mole fraction)

Regression III: log K0c = -0.557 log S + 4.277 (S in mmoles/l)

Additionally, an estimation was performed based on the octanol/water partition coefficient of log Pow > 3.1 (RCC Project 716344) using a regression equation (source as above) relating the Koc with Pow.

Regression IV: log Koc = 0.544 • log Pow + 1.377

It resulted a Koc value of 1157 confirming that FAT 41024/B is at least only little mobile in soils.