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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The members of this category are gases at standard temperature and pressure and will predominantly partition to the atmosphere. The use of QSAR to predict the Henry's Law Constant and the soil adsorption coefficient of representative constituents of these streams is an appropriate technique.

 

The representative constituents of the category studied and used as supporting read-across are But-1-en-3-yne (CAS 689-97-4), But-1-ene (CAS 106-98-9), But-2-ene, cis- (CAS 590-18-1), But-2-ene, trans- (CAS 624-64-6), Buta-1,2-diene (CAS 590-19-2), Buta-1,3-diene (CAS 106-99-0), Butane (CAS 106-97-8), Prop-1-ene, 2-methyl- (CAS 115-11-7), Propane, 2-methyl- (CAS 75-28-5).

 

The log Koc of representative constituents of this category has been predicted using the EPISUITE v4.11 KOCWIN (2017) program, which uses methodology described by Sahljic et al., (1995) and Meylan et al. (1995). The predicted log Koc for this category ranged from 1.21 - 2.51 (Kow method) and 1.5 - 1.79 (MCI method).

 

Henry's Law Constant values of representative constituents were determined using the group and bond contribution methods. The constants were found to range from 7,143 to 103,352 Pa. m3/mole and from 1,956 to 98,184 Pa.m3/mole for the group and bond contribution methods, respectively.

Additional information