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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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Environmental fate & pathways

Henry's Law constant

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Henry's law constant
Type of information:
Adequacy of study:
supporting study
4 (not assignable)
Rationale for reliability incl. deficiencies:
results derived from a (Q)SAR model, with limited documentation / justification
no guideline followed
Principles of method if other than guideline:
Estimation of the Henry's Law Constant (HLC) with the PC programme HENRY (v3.10, bond estimation method)
GLP compliance:
0.023 Pa m³/mol
25 °C
Atm. press.:
1 013 hPa
The HLC of butane-1,3-diol was estimated to be 0.0233 Pa m³/mol at 25°C.
Executive summary:

Based on a calculated HLC of 0.0233 Pa m³/mol (25 °C), 1,3 -butanediol is considered to have low potential for volatilization from water.

Description of key information

HLC = 0.0233 Pa*m³/mol at 25 °C (calculated; ECT, 2008). 

Key value for chemical safety assessment

Additional information

1,3 -Butanediol is considered to have low potential for volatilization from water.