Hg2Cl2

semiconductor

· Hg2Cl2

Hg₂Cl₂ (mercury(I) chloride, also known as calomel) is an ionic compound semiconductor historically significant in electrochemistry and analytical chemistry. Though largely superseded in modern applications due to mercury's toxicity and environmental concerns, it remains notable as the basis material for calomel reference electrodes, which are still used in certain electrochemical measurements where their stability and well-defined potential are critical. Engineers selecting this material must weigh its electrochemical reliability against regulatory restrictions and safer alternatives like Ag/AgCl reference electrodes.

reference electrodeselectrochemical cellsanalytical instrumentationlegacy laboratory equipmentcorrosion monitoringpotentiometric sensors

Compliance & Regulations

?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	2.840	eV	—

Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

Export Control

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.

Hg2Cl2

Electrical Properties

Regulatory Screening

Environmental

Export Control