Mercury(I) chloride
| Names | |
|---|---|
| IUPAC name
Dimercury dichloride | |
| Other names | |
| Identifiers | |
3D model (JSmol) |
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| ChEBI | |
| ChemSpider | |
| ECHA InfoCard | 100.030.266 |
| EC Number |
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| 25976 | |
PubChem CID |
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| RTECS number |
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| UNII | |
| UN number | 3077 |
CompTox Dashboard (EPA) |
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| Properties | |
| Hg2Cl2 | |
| Molar mass | 472.09 g/mol |
| Appearance | White solid |
| Density | 7.150 g/cm3 |
| Melting point | 383 °C (721 °F; 656 K) (sublimes) |
| 0.2 mg/100 mL | |
Solubility product (Ksp) |
1.43×10−18 |
| Solubility | insoluble in ethanol, ether |
| −26.0·10−6 cm3/mol | |
Refractive index (nD) |
1.973 |
| Structure | |
| tetragonal | |
| Thermochemistry | |
Std molar entropy (S⦵298) |
196 J·mol−1·K−1 |
Std enthalpy of formation (ΔfH⦵298) |
−265 kJ·mol−1 |
| Hazards | |
| GHS labelling: | |
| Warning | |
| H302, H315, H319, H335, H410 | |
| P261, P264, P270, P271, P273, P280, P301+P312, P302+P352, P304+P340, P305+P351+P338, P312, P321, P330, P332+P313, P337+P313, P362, P391, P403+P233, P405, P501 | |
| NFPA 704 (fire diamond) | |
| Flash point | Non-flammable |
| Lethal dose or concentration (LD, LC): | |
LD50 (median dose) |
210 mg/kg (rat, oral) |
| Safety data sheet (SDS) | ICSC 0984 |
| Related compounds | |
Other anions |
Mercury(I) fluoride Mercury(I) bromide Mercury(I) iodide |
Related compounds |
Mercury(II) chloride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
Mercury(I) chloride is the chemical compound with the formula Hg2Cl2. Also known as the mineral calomel (a rare mineral) or mercurous chloride, this dense white or yellowish-white, odorless solid is the principal example of a mercury(I) compound. It is a component of reference electrodes in electrochemistry.