Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
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EC number: 231-106-7 | CAS number: 7439-97-6
Henry's Law constant
Administrative data
Link to relevant study record(s)
Description of key information
High potential for volatilization
Key value for chemical safety assessment
Additional information
Due to a low water solubility and high vapour pressure, mercury exhibits a very high volatilization potential. The vapour pressure of mercury metal is strongly dependent upon temperature, and it vaporizes readily under ambient conditions. Its saturation vapour pressure of 14 mg/m3 greatly exceeds the average permissible concentrations for occupational (0.05 mg/m3) or continuous environmental exposure (0.015 mg/m3) (WHO, 1976). Elemental mercury partitions strongly to air in the environment and is not found in nature as a pure, confined liquid. Most of the mercury encountered in the atmosphere is elemental mercury vapour.
from: U.S. EPA (1997). Mercury Study Report to Congress. Volume VI: An Ecological Assessment for Anthropogenic Mercury Emissions in the United States. EPA-452/R-97-008
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