dimercurydichloride , ≥99.5% , 10112-91-1

Synonym(s):
Calomel;Mercurous chloride

CAS NO.：10112-91-1

Empirical Formula: Cl2Hg2

Molecular Weight: 472.09

MDL number: MFCD00011043

EINECS: 233-307-5

PRODUCT Properties

• Melting point: 400 °C (subl.)(lit.)
• Boiling point: 383°C
• Density: 7.15
• vapor pressure: 1.7 mm Hg at 236 °C
• storage temp.: Poison room
• solubility: insoluble in ethanol, ethyl ether
• form: powder
• Specific Gravity: 7.15
• color: White
• Odor: Odorless
• Water Solubility: Soluble in (0.002g/L )water.
• Sensitive: Moisture & Light Sensitive
• Merck: 14,5894
• Solubility Product Constant (Ksp): pKsp: 17.88（25°C）
• Dielectric constant: 7.0（Ambient）
• Exposure limits: ACGIH: TWA 0.025 mg/m3 (Skin); NIOSH: IDLH 10 mg/m3; TWA 0.05 mg/m3; Ceiling 0.1 mg/m3
• InChIKey: ZOMNIUBKTOKEHS-UHFFFAOYSA-L
• CAS DataBase Reference: 10112-91-1(CAS DataBase Reference)
• NIST Chemistry Reference: Mercurous chloride(10112-91-1)
• EPA Substance Registry System: Mercurous chloride (10112-91-1)

Description and Uses

Mercury(I) chloride, a colorless solid also known as the mineral calomel, is the compound with the formula Hg2Cl2, with the connectivity Cl-Hg-Hg-Cl. It reacts with chlorine to form mercuric chloride, which resists further oxidation. Hg2Cl2 is a linear molecule. Mercurous chloride forms through the reaction of elemental mercury and mercuric chloride.
Hg + HgCl2→Hg2Cl2

Calomel is used as a laboratory reagent, as a fungicide, and as a depolarizer in dry batteries.

Safety

• Symbol(GHS): GHS07,GHS08,GHS09
• Signal word: Danger
• Hazard statements: H302+H312-H315-H319-H334-H335-H410-H302-H400
• Precautionary statements: P280a-P405-P501a-P261-P280-P284-P304+P340-P305+P351+P338-P342+P311
• Hazard Codes: Xn,N
• Risk Statements: 22-36/37/38-50/53
• Safety Statements: 13-24/25-46-60-61
• RIDADR: UN 2811 6.1/PG 3
• WGK Germany: 3
• RTECS: OV8740000
• TSCA: Yes
• HazardClass: 6.1
• PackingGroup: II