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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Link to relevant study record(s)

Description of key information

Key value for chemical safety assessment

Koc at 20 °C:
0.82

Additional information

According to the REACH Regulation (EC n. 1907/2006), annex VIII, column 2,the study regarding adsorption/desorption does not need to be conducted if based on the physicochemical properties, the substance can be expected to have a low potential for adsorption (e.g. the substance has a low octanol- water partition coefficient).

Partition coefficient cannot be measured for inorganic salt.

Tetraphosphorus trisulphide has an estimated value of log Kow = - 0.23 calculated by EPI Suite v.4.11 even though inorganic salts are out of the applicability domain (SMILES notation used as input for prediction: S1P2P3P2SP1S3). This estimated value of log Kow is very low.

A predicted value for partition coefficient organic carbon-water was calculated by EUSES 2.1.2 Koc = 0.82 l/kg considering the substance as predominantly hydrophobics. This value was used by CHESAR for chemical safety assessment. Considering this predicted value, a low adsorption potential is expected. As reported in ECHA Guidance Chapter R.7b: in general substances with a Koc <500 – 1000 l/kg are not likely sorbed to sediment (SETAC 1993).