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EC number: 915-673-4 | CAS number: 211519-85-6
Henry's Law constant
Administrative data
Link to relevant study record(s)
Description of key information
Henry's Law Constant (HLC): Calculated HLC for the submission substance at environmental temperature (12°C): 2.9E+05 Pa m3/mol-1
Key value for chemical safety assessment
- Henry's law constant (H) (in Pa m³/mol):
- 290 000
- at the temperature of:
- 12 °C
Additional information
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. The HLC can be estimated from the ratio of the vapour pressure (VP) to the water solubility (WS).
HLC = (VP x MW)/WS
Where MW is molecular weight.
The calculated HLC values for the constituents and named impurity of the submission substance at environmental temperature (12°C) are very high, shown in the table below (calculated values taken from EUSES 2.1.2).
Name | HLC (Pa m3mol-1) |
4,4,13,13-Tetraethoxy-3,14-dioxa-8,9-dithia-4,13-disilahexadecane (S2 constituent) | 1.8E+05 |
4,4,14,14-Tetraethoxy-3,15-dioxa-8,9,10-trithia-4,14-disilaheptadecane (S3 constituent) | 2.3E+05 |
4,4,15,15-Tetraethoxy-3,16-dioxa-8,9,10,11-tetrathia-4,15-disilaoctadecane (S4 constituent) | 2.9E+05 |
4,4,16,16-Tetraethoxy-3,17-dioxa-8,9,10,11,12-pentathia-4,16-disilanonadecane (S5 named impurity) | 3.6E+05 |
For chemical safety assessment, the calculated value of the S4 constituent is used for the submission substance, 2.9E+05 Pa m3mol-1. All values indicate that volatilisation from water is significant for the parent substance.
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