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Mercury(II) chloride

Mercury(II) chloride or mercuric chloride (archaically, corrosive sublimate) is the chemical compound of mercury and chlorine with the formula HgCl2. This white crystalline solid is a laboratory reagent and a molecular compound. Once used as a treatment for syphilis, it is no longer used for medicinal purposes because of mercury toxicity and the availability of superior treatments.

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Further Information

Names

IUPAC namesMercury(II) chloride
Mercury dichloride

Other names

Mercuric chloride
Corrosive sublimate

Identifiers

CAS Number: 7487-94-7

JSmol: Interactive image

ChemSpider: 22517

ECHA InfoCard: 100.028.454

EC Number: 231-299-8

KEGG: C13377

PubChem: 24085

RTECS number: OV9100000

UN number: 1624

Properties

Chemical formula: HgCl

Molar mass: 271.52 g/mol

Appearance: colorless or white solid

Odor: odorless

Density: 5.43 g/cm

Melting point: 276 °C (529 °F; 549 K)

Boiling point: 304 °C (579 °F; 577 K)

Solubility in water: 3.6 g/100 mL (0 °C)
7.4 g/100 mL (20 °C)
48 g/100 mL (100 °C)

Solubility: alcohol

K: 3.2 (0.2M solution)

Magnetic susceptibility: −82.0·10 cm/mol−63

Refractive index: 1.859

Structure

Crystal structure: orthogonal

Coordination geometry: linear

Molecular shape: linear

Dipole moment: zero

Thermochemistry

Std molar
entropy: 144 J·mol·K−1−1

Std enthalpy of
formation: −230 kJ·mol−1

Pharmacology

ATC code: WHOD08AK03

Hazards

Safety data sheet: ICSC 0979

EU classification:

R-phrases: R28 R34 R48/24/25 R50/53

S-phrases: (S1/2) S36/37/39 S45 S60 S61

NFPA 704:

Flash point: Non-flammable

Related compounds

anions: Mercury(II) fluoride

cations: Zinc chloride

Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).

Infobox references