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Ammonium hexachloroiridate(IV)

Ammonium hexachloroiridate(IV) structure

CAS No:
16940-92-4
Formula:
Cl6H4IrN-
Chemical Name:
Ammonium hexachloroiridate(IV)
Synonyms:
AMMONIUM CHLOROIRIDATE;AMMONIUM CHLOROIRIDITE;AMMONIUM IRIDIC CHLORIDE;AMMONIUM IRIDIUM CHLORIDE;Ammonium chloroiride;Ammonium hexachloroiridate;Ammonium chloroiridate(IV);AMMONIUM HEXACHLOROIRIDATE(IV), 99.99%
Categories:
Inorganic Chemistry > Inorganic Salts

Description

Ammonium hexachloroiridate is a salt comprising separate ammonium cations and octahedral [IrCl6](2-) anions. It contains a hexachloroiridate(2-).

Olive Green Crystals

It is precipitated several times from aqueous solution by saturation with ammonium chloride. This removes any palladium and rhodium. It is then washed with ice-cold water and dried over conc H2SO4 in a vacuum desiccator. If osmium or ruthenium is present, it can be removed as the tetroxide by heating with conc HNO3, followed by conc HClO4, until most of the acid has been driven off. (This treatment is repeated. ) The near-dry residue is dissolved in a small amount of water and added to excess NaHCO3 solution and bromine water. On boiling, iridic (but not platinic) hydroxide is precipitated. It is dissolved in HCl and precipitated several times, then dissolved in HBr and treated with HNO3 and HCl to convert the bromides to chlorides. Saturation with ammonium chloride and cooling precipitates ammonium hexachloroiridate which is filtered off and purified as above [Woo & Yost J Am Chem Soc 53 884 1931].

Ammonium hexachloroiridate(IV) Basic Attributes

Molecular Weight：

422.96

Exact Mass：

438.844757

EC Number：

241-007-0

TSCA：

TSCA listed

Color/Form：

Red-black

Characteristics

PSA：

XLogP3：

4.88940

Appearance：

Red-black Crystalline Powder

Density：

2.86 g/mL at 25 °C(lit.)

Melting Point：

decomposes [STR93]

Water Solubility：

Soluble in water.

Toxicity：

rat,LD50,oral,1852mg/kg (1852mg/kg),Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 21(7), Pg. 55, 1977.

Flammability characteristics：

Non flammable

Critical Temperature & Pressure：

under inert gas (nitrogen or Argon) at 2-8°C

Safety Information

Packing level：

III

Hazard category：

Transport codes：

1759

wgk germany：

hazard class code：

safety instructions：

26-36/37/39-45

RTECS Number：

BP5295000

Marks：

Precautionary statement(s)：

P280

Hazard Statements：

36/38-22-20/21/22

RIDADR：

1759

GHS Classification：

|Warning|H302 (36.03%): Harmful if swallowed [Warning Acute toxicity, oral]|P261, P264, P270, P271, P272, P280, P301+P312, P302+P352, P304+P312, P304+P340, P312, P321, P322, P330, P333+P313, P363, and P501|Aggregated GHS information provided by 136 companies from 6 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Ammonium hexachloroiridate(IV) Use and Manufacturing

Uses

Used as a raw material for the preparation of iridium compounds such as iridium tetrachloride.

Ammonium Hexachloroiridate(IV) is a reagent used for research applications and is used for catalytic production on hydrogen.It is a key intermediate in the isolation of iridium from ores. Most other metals form insoluble sulfides when aqueous solutions of their chlorides are treated with hydrogen sulfide, but [IrCl6]2 resists ligand substitution. Upon heating under hydrogen, the solid salt converts to the metal:(NH4)2[IrCl6] + 2 H2→ Ir + 6 HCl + 2 NH3

Iridium complexes are generated from ammonium hexachloroiridate.

Manufacturing Info：

Iridate(2-), hexachloro-, ammonium (1:2), (OC-6-11)-: ACTIVE

Computed Properties

Molecular Weight:441.0
Hydrogen Bond Donor Count:2
Hydrogen Bond Acceptor Count:1
Exact Mass:440.84184
Monoisotopic Mass:438.84479
Topological Polar Surface Area:2
Heavy Atom Count:9
Complexity:62.7
Covalently-Bonded Unit Count:3
Compound Is Canonicalized:Yes

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Guide of Ammonium hexachloroiridate(IV)

Description
Basic Attributes
Characteristics
Safety Information
Use and Manufacturing
Computed Properties
Recommended Suppliers
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Ammonium hexachloroiridate(IV)

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