The Mercury fluoride (HgF₂), with the CAS registry number 7783-39-3 and EINECS registry number 231-994-6, has the systematic name of mercury difluoride. It is a kind of yellow to pink powder. And the molecular formula of the chemical is HgF₂.

The characteristics of Mercury fluoride (HgF₂) are as followings: (1)#H bond acceptors: 0; (2)#H bond donors: 0; (3)#Freely Rotating Bonds: 0; (4)Polar Surface Area: 0 Å²; (5)Enthalpy of Vaporization: 25.54 kJ/mol; (6)Boiling Point: 19.5 °C at 760 mmHg; (7)Vapour Pressure: 922 mmHg at 25°C.

You should be cautious while dealing with Mercury fluoride (HgF₂). It is very toxic by inhalation, in contact with skin and if swallowed, and it is also very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. What's more, it has danger of cumulative effects. Therefore, you had better take the following instructions: Keep away from food, drink and animal feeding stuffs; After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer); In case of accident or if you feel unwell, seek medical advice immediately (show label where possible); This material and/or its container must be disposed of as hazardous waste; Avoid release to the environment. Refer to special instructions safety data sheet.

Addtionally, the following datas could be converted into the molecular structure:
(1)SMILES: F[Hg]F
(2)InChI: InChI=1/2FH.Hg/h2*1H;/q;;+2/p-2
(3)InChIKey: FMSYTQMJOCCCQS-NUQVWONBAW