Agent Name

Mercurous chloride

Alternative Name

Calomel

CAS Number

10112-91-1

Formula

Cl2-Hg2

Major Category

Metals

Synonyms

Calogreen; Calomel; Calotab; Chlorure mercureux [French]; Dimercury dichloride; Mercurous chloride; Mercury subchloride; Mercury(I) chloride; Dimercury dichloride; Mercury chloride (Hg2Cl2); [ChemIDplus] UN3077

Category

Mercury Compounds, Inorganic

Description

White powder or crystals; practically insoluble (0.0002 g/100 ml of water at 25 deg C); [ATSDR ToxProfiles]

Sources/Uses

Has been used therapeutically as a cathartic, diuretic, antiseptic, and antimicrobic (syphilis); Used in agriculture to kill root maggots (cabbage and onions); Also used in dark green Bengal lights, calomel paper, calomel electrodes, fungicides, and with gold to paint on porcelain; [Merck Index]

Comments

A skin, eye, and respiratory tract irritant; Toxic by ingestion; May be absorbed through skin or by inhalation of aerosol; May cause damage to the kidneys and nervous system; [ICSC] See "Mercury, inorganic compounds" and the linked occupational disease.

Restricted

No active registrants for Calomel, Fungchex, Calo-Chlor, or Calocure; [NPIRS]

Exposure Assessment
Skin Designation (ACGIH)

Yes

TLV (ACGIH)

0.02 mg/m3, as Hg

PEL (OSHA)

0.1 mg/m3, as Hg

MAK

0.02 mg/m3, as Hg, inhalable fraction

IDLH (NIOSH)

10 mg/m3, as Hg

Explanatory Notes

Sublimes at 400-500 deg C; [ATSDR ToxProfiles]

Adverse Effects
Neurotoxin

Sensorimotor Neuropathy

Nephrotoxin

Yes

Links to Other NLM Databases
Toxicity Information

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Chemical Information

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Biomedical References

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Related Information in HazMap
Processes

Industrial Processes with risk of exposure: