Ammonium hexachloroplatinate
![]() | |
![]() | |
Names | |
---|---|
IUPAC name
Ammonium hexachloroplatinate(IV)
| |
Other names
ammonium chloroplatinate
| |
Identifiers | |
3D model (
JSmol ) |
|
ChEBI | |
ChemSpider | |
ECHA InfoCard
|
100.037.233 |
EC Number |
|
PubChem CID
|
|
UNII | |
CompTox Dashboard (EPA)
|
|
| |
| |
Properties | |
(NH4)2PtCl6 | |
Molar mass | 443.87 g/mol |
Appearance | yellow crystals |
Odor | odorless |
Density | 3.065 g/cm3 |
Melting point | 380 °C (716 °F; 653 K) decomposes |
0.289 g/100ml (0 °C) 0.7 g/100ml (15 °C)[1] 0.499 g/100ml (20 °C) 3.36 g/100ml (100 °C) | |
Hazards | |
GHS labelling: | |
![]() ![]() ![]() ![]() | |
Danger | |
H290, H301, H317, H318, H334 | |
P234, P261, P264, P270, P272, P280, P285, P301+P310, P302+P352, P304+P341, P305+P351+P338, P310, P321, P330, P333+P313, P342+P311, P363, P390, P404, P405, P501 | |
Lethal dose or concentration (LD, LC): | |
LD50 (median dose)
|
195 mg/kg rat |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|
Ammonium hexachloroplatinate, also known as ammonium chloroplatinate, is the inorganic compound with the formula (NH4)2[PtCl6]. It is a rare example of a soluble platinum(IV) salt that is not hygroscopic. It forms intensely yellow solutions in water. In the presence of 1M NH4Cl, its solubility is only 0.0028 g/100 mL.
Preparation and structure
The compound consists of separate
As analyzed by
Uses and reactions
Ammonium hexachloroplatinate is used in platinum plating. Heating (NH4)2[PtCl6] under a stream of hydrogen at 200 °C produces platinum sponge. Treating this with chlorine gives H2[PtCl6].[2]
Ammonium hexachloroplatinate decomposes to yield platinum sponge when heated to high temperatures:[2][5]
- 3(NH4)2PtCl6 → 3Pt(s) + 2NH4Cl(g) + 16HCl(g) + 2N2(g)
Safety
Dust containing ammonium hexachloroplatinate can be highly allergenic. "Symptoms range from irritation of skin and mucous membranes to life-threatening attacks of asthma."[6]
Related compounds
References
- ^ "ammonium hexachloroplatinate(IV)". Chemister.ru. 2007-03-19. Retrieved 2014-06-03.
- ^ ISBN 978-0-470-13240-1.
- ISBN 0-7514-0413-6.
- ISBN 9780721676289.
- ISBN 3527306730.