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10112-91-1

10112-91-1 Structure

10112-91-1 Structure
IdentificationMore
[Name]

MERCUROUS CHLORIDE
[CAS]

10112-91-1
[Synonyms]

CALOMEL
MERCUROUS CHLORIDE
MERCURY(+1)CHLORIDE
MERCURY CHLORIDE
MERCURY(I) CHLORIDE
MERCURY(II) CHLORIDE
Calogreen
Calotab
Chlorure mercureux
chloruremercureux
Dimercury dichloride
dimercurydichloride
Hg2-Cl2
Hydrochloric acid mercury salt (1:1)
mercurous
Mercury chloride (Hg2Cl2)
Mercury monochloride
Mercury protochloride
Mercury subchloride
mercurychloride(hg2cl2)
[EINECS(EC#)]

233-307-5
[Molecular Formula]

Cl2Hg2
[MDL Number]

MFCD00011043
[Molecular Weight]

472.09
[MOL File]

10112-91-1.mol
Chemical PropertiesBack Directory
[Appearance]

Off-white amorphous powder
[Appearance]

White, rhombic crystals or crystalline powder; odorless. Stable in air but darkens on exposure to light.decomposed by alkalies. Insoluble in water, ether, alcohol, and cold dilute acids.
[mp ]

400 °C (subl.)(lit.)
[density ]

7.15
[storage temp. ]

Poison room
[form ]

powder
[Merck ]

14,5894
[CAS DataBase Reference]

10112-91-1(CAS DataBase Reference)
[NIST Chemistry Reference]

Mercurous chloride(10112-91-1)
[EPA Substance Registry System]

10112-91-1(EPA Substance)
Safety DataBack Directory
[Hazard Codes ]

Xn,N
[Risk Statements ]

R22:Harmful if swallowed.
R36/37/38:Irritating to eyes, respiratory system and skin .
R50/53:Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment .
[Safety Statements ]

S13:Keep away from food, drink and animal feeding stuffs .
S24/25:Avoid contact with skin and eyes .
S46:If swallowed, seek medical advice immediately and show this container or label .
S60:This material and/or its container must be disposed of as hazardous waste .
S61:Avoid release to the environment. Refer to special instructions safety data sheet .
[RIDADR ]

UN 2811 6.1/PG 3
[WGK Germany ]

3
[RTECS ]

OV8740000
[HazardClass ]

6.1
[PackingGroup ]

II
Raw materials And Preparation ProductsBack Directory
[Raw materials]

Nitric acid-->Sodium chloride-->MERCURY
Hazard InformationBack Directory
[General Description]

Odorless white solid. Sinks in water.
[Reactivity Profile]

MERCUROUS CHLORIDE is incompatible with acetylene, ammonia, chlorine dioxide, azides, calcium (amalgam formation), sodium carbide, lithium, rubidium, copper .
[Hazard]

Toxic dose is uncertain.
[Health Hazard]

Acute poisoning can result from inhaling dust concentrations of 1.2-8.5 mg/m 3 in air; symptoms include pain and tightness in chest, coughing, and difficulty in breathing. Compound is an irritant, cathartic, or purgat ive; rarely, ``calomel sickness,'' a benign reaction with fever and rash, appears after about 1 week; seldom causes systemic poisoning but may be fatal if retained to 30-40 mg/kg. Contact with eyes causes mild irritation.
Material Safety Data Sheet(MSDS)Back Directory
[msds information]

mercurous chloride(10112-91-1).msds
Questions And AnswerBack Directory
[Chemical Properties]

Mercury (I) chloride is a dense white powder and insoluble in water and may be light sensitive. It is incompatible with strong bases, carbonates, sulphides, cyanides, alkalis, sulphites, sulphates, hydrogen peroxide, ammonia, iodine, and hydrogen bromide.
[Uses]

Mercury(I) chloride is used in calomel electrodes; in ceramic painting; as a fungicide; in pyrotechnics for producing dark green light; in agriculture for controlling root maggots; and as an antiseptic and antisyphilitic agent in medicine.
[Preparation]

Mercury(I) chloride is prepared by passing a limited amount of chlorine gas over mercury in a heated silica retort. Excess chlorine should be avoided as it can oxidize mercury(I) chloride to mercury(II) chloride.
2Hg + Cl2 → Hg2Cl2
The product generally contains some mercury(II) chloride which is removed by treating the product mixture with water and filtering out the insoluble mercury(I) salt from the soluble mercury(II) salt.
The compound also can be made by heating mercury(II) chloride with mercury. The product Hg2Cl2 sublimes and is collected:
HgCl2 + Hg → Hg2Cl2
Mercury(I) chloride is obtained as a white precipitate by adding a cold acidic solution of sodium chloride or other soluble chloride to a solution of mercurous salt, such as mercury(I) nitrate:
[Hg2]2+ (aq) + 2Cl¯ (aq) → Hg2Cl2 (s)
The precipitation method, however, does not form high-purity product as it contains small amounts of reactant and product ions that stick to the Hg2Cl2 precipitate and are difficult to remove by washing with water.
[Reactions]

Mercury(I) chloride oxidizes to mercury(II) chloride when heated with chlorine:
Hg2Cl2 + Cl2 → 2HgCl2
Mercury(I) chloride is a reducing agent and, therefore, its reaction with oxidizing substances can oxidize it to Hg(II) compounds.
When heated at elevated temperatures, it partially dissociates to mercury metal and mercury(II) chloride:
Hg2Cl2 → Hg + HgCl2
This disproportionation (or breakdown of a compound into two products containing the same element but in different oxidation states) also occurs to some degree when mercury(I) chloride is heated and sublimed in an open container. Reaction with ammonia in solution forms an unstable black adduct which slowly converts to mercury(II) amidochloride, NH2HgCl, releasing mercury:
Hg2Cl2 + 2NH3 → ClHg—HgNH2 + NH4Cl
ClHg—HgNH2 → NH2HgCl + Hg
[Toxicity]

Mercury(I) chloride is highly toxic by ingestion and other routes of exposure. The symptoms include nausea, vomiting, abdominal pain, diarrhea and kidney damage.
Well-known Reagent Company Product InformationBack Directory
[Acros Organics]

Mercury(I) chloride, extra pure, 99+%(10112-91-1)
[Alfa Aesar]

Mercury(I) chloride, ACS, 99.5% min(10112-91-1)
[Sigma Aldrich]

10112-91-1(sigmaaldrich)
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