Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

Administrative data

Description of key information

Additional information

In accordance with column 2 of REACH Annex VIII, the adsorption/desorption study does not need to be conducted as based on the physico-chemical properties the substance can be expected to have a low potential for adsorption (the substance has a log octanol water partition coefficient less than 3).

A predicted Koc value was determined using the ‘non-hydrophobics’ log Kow-based prediction method for log Kocdeveloped by Sabljić and Güsten (1995) for the European Commission, and recommended in EU Guidance., as implemented in EUSES v 2.1.2:

log Koc = 0.52*log Kow + 1.02

Based on the key log Kow value of 1.7, the predicted Koc is 80.2 l/kg (log Koc = 1.9). The calculated value is considered suitable as a supporting study and for the environmental exposure assessment.

The Henry's Law constant for propane-1-thiol has been calculated to be 829.74 Pa-m3/mol at 25°C, based on vapour pressure of 20.7 kPa and water solubility of 1900 mg/l at 25°C and a molecular weight of 76.16 g/mol. This equation for calculating the Henry's Law Constant is indicated in the Guidance on information requirements and chemical safety assessment (IR & CSA) Chapter 16 "Environmental exposure estimate" (Equation R.16-4) and is therefore considered an appropriate technique. The calculated value is considered suitable for use for this endpoint. This result indicates that propane-1-thiol is expected to volatilise rapidly from the aquatic environment.