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EC number: 242-056-0
CAS number: 18171-19-2
Henry's Law Constant:
Calculated HLC for the parent substance: not relevant due to rapid
hydrolysis in contact with water
Calculated HLC for silanol hydrolysis product at 25°C: 1.1E-4 Pa m3/mol
HLC for methanol: 0.461 Pa m3/mol at 25°C
The transfer of a substance from the water phase to the gas phase can be
estimated by means of the Henry’s Law Constant (HLC). No measured value
for this parameter is available.
Volatilisation from water is not relevant for the parent substance due
to its rapid hydrolysis in contact with water.
For the silanol hydrolysis product, 3-chloropropyl(methyl)silanediol,
the predicted water solubility limit cannot be validated accurately due
to condensation phenomena. The HLC can be estimated using the
established Bond method from HENRYWIN v. 3.20 within the EPIWeb suite
v4.11. This method derives the Henry's Law Constant directly from the
structure, as the sum of the bond contribution values for each chemical
bond in the molecule. The bond contribution values were determined based
on least-square regression analysis of measured HLCs for organic
The calculated HLC value for the silanol hydrolysis product at 25°C is
very low, 1.1E-4 Pa m3mol-1 (HenryWin v 3.20).
Methanol has a reported HLC value of 0.461 Pa m3/mol at 25°C
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