Manganese(II) chloride

Anhydrous

Tetrahydrate

IUPAC name[hide]

Manganese(II) chloride
Manganese dichloride

Other names[hide]

Manganous chloride

Identifiers

CAS number

7773-01-5 ^Y, 38639-72-4 (dihydrate), 13446-34-9 (tetrahydrate)

PubChem

24480

ChemSpider

22888 ^Y

UNII

6YB4901Y90 ^Y

ChEMBL

CHEMBL1200693 ^N

RTECS number

OO9625000

Jmol-3D images

Image 1

Properties

Molecular formula

MnCl₂

Molar mass

125.844 g/mol (anhydrous)
161.874 g/mol (dihydrate)
197.91 g/mol (tetrahydrate)

Appearance

pink solid (tetrahydrate)

Density

2.977 g/cm³ (anhydrous)
2.27 g/cm³ (dihydrate)
2.01 g/cm³ (tetrahydrate)

Melting point

654 °C (anhydrous)
dihydrate dehydrates at 135 °C
tetrahydrate dehydrates at 58 °C

Boiling point

1225 °C

Solubility in water

63.4 g/100 ml (0 °C)
73.9 g/100 ml (20 °C)
88.5 g/100 ml (40 °C)
123.8 g/100 ml (100 °C)

Solubility

soluble in pyridine, ethanol
insoluble in ether

Structure

Crystal structure

CdCl₂

Coordination
geometry

octahedral

Hazards

EU Index

Not listed

Flash point

Non-flammable

LD₅₀

250-275 mg/kg (rat, oral)

Related compounds

Other anions

Manganese(II) fluoride
Manganese(II) bromide
Manganese(II) iodide

Other cations

Manganese(III) chloride
Technetium(IV) chloride
Rhenium(III) chloride
Rhenium(IV) chloride
Rhenium(V) chloride
Rhenium(VI) chloride

Related compounds

Chromium(II) chloride
Iron(II) chloride

 N (verify) (what is: Y/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)