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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Henry's Law constant

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Administrative data

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Description of key information

Parent compound: From the water surface, the substance will rapidly evaporate into the atmosphere.
Hydrolysis product: From the water surface, the substance will not evaporate into the atmosphere.
However, the assessment of the volatility of the parent compound may be of low relevance due to the rapid hydrolysis of the acid chloride in aqueous solutions.

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
0.001
at the temperature of:
25 °C

Additional information

Parent compound isovaleryl chloride:

The bond estimation method gives a value of 1.58 E+02 Pa*m³/mol (HENRYWIN Program, v3.20; EPI Suite v4.10; BASF SE, 2011), which is representative for the uncharged molecule. Based on the results of the EPI Suite calculation the substance will rapidly evaporate from the water surface into the atmosphere.

Isovaleryl chloride (CAS 108 -12 -3) rapidly decomposes in water and forms HCl (CAS 7647 -01 -0) and isovaleric acid (CAS 503 -74 -2).
Therefore, the model calculation may be of low relevance.

Hydrolysis product isovaleric acid:

The bond estimation method gives a value of 0.130 Pa*m³/mol (HENRYWIN Program, v3.20; EPI Suite v4.10; BASF SE, 2011), which is representative for the uncharged molecule. At environmental conditions the molecule is expected to be ionised, therefore a pH-corrected HLC was calculated according to the REACH Guidance document (2008). The resulting Henry's Law constant was 7.27E-4 Pa*m³/mol at pH 7 (BASF, 2011).

Based on the pH-corrected HLC, the substance will not evaporate from the water surface into the atmosphere.