Mercury(II) cyanide
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Mercury(II) cyanide, also known as mercuric cyanide, is a poisonous compound of mercury and cyanide. It is an odorless, toxic white powder. It is highly soluble in polar solvents such as water, alcohol, and ammonia, slightly soluble in ether, and insoluble in benzene and other hydrophobic solvents.[2]
Quick Facts Names, Identifiers ...
Names | |
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IUPAC name
dicyanomercury | |
Other names
mercuric cyanide; cyanomercury; neutral mercury cyanide (1:2); mercury dicyanide; hydrargyri cyanidum[1] (homeopathy) | |
Identifiers | |
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3D model (JSmol) |
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3679510 | |
ChEBI | |
ChemSpider | |
ECHA InfoCard | 100.008.857 |
EC Number |
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2563 | |
PubChem CID |
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UNII | |
UN number | 1636 |
CompTox Dashboard (EPA) |
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Properties | |
Hg(CN)2 | |
Molar mass | 252.63 g/mol |
Appearance | colorless crystals or white powder |
Odor | odorless |
Density | 3.996 g/cm3 |
Melting point | 320 °C (608 °F; 593 K)[2] (decomposes) |
9.3 g/100 mL (14 °C) 53.9 g/100 mL (100 °C)[3] | |
Solubility | 25 g/100 mL (methanol, 19.5 °C) soluble in ethanol, ammonia, glycerin slightly soluble in ether insoluble in benzene |
−67.0·10−6 cm3/mol | |
Refractive index (nD) |
1.645 |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards |
Highly toxic |
GHS labelling:[4] | |
Danger | |
H300, H301, H310, H330, H373, H410 | |
P260, P262, P264, P270, P271, P273, P280, P284, P301+P310, P302+P350, P304+P340, P310, P314, P320, P322, P330, P361, P363, P391, P403+P233, P405, P501 | |
NFPA 704 (fire diamond) | |
Lethal dose or concentration (LD, LC): | |
LD50 (median dose) |
26 mg/kg |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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