Product Description of Palladium CAS No. 7440-05-3
Palladium is a transition metal belonging to Group 10 of the periodic table and is a lightweight platinum-group metal. It has a silvery-white appearance and is moderately hard, malleable, and ductile. As a Group 10 transition element, palladium shares many characteristics with nickel, located above it, and platinum, positioned below it in the periodic table. This soft, silver-white metal exhibits chemical and physical properties closely resembling those of platinum. Its excellent malleability and ductility allow it to be rolled into thin sheets and drawn through dies to produce extremely fine wires. Palladium dissolves in aqua regia, hot nitric acid, and sulfuric acid, is slightly soluble in hydrochloric acid, and remains insoluble in both cold and hot water.
Palladium Chemical Properties
| Melting point | 1554 °C(lit.) |
| Boiling point | 2970 °C(lit.) |
| density | 1.025 g/mL at 25 °C |
| storage temp. | no restrictions. |
| solubility | soluble in aqua regia |
| form | wire |
| color | Silver-gray |
| Specific Gravity | 12.03 |
| Odor | Odorless |
| resistivity | 9.96 μΩ-cm, 20°C |
| Water Solubility | INSOLUBLE |
| Merck | 14,6989 |
| Exposure limits | ACGIH: TWA 1 mg/m3 OSHA: TWA 15 mg/m3; TWA 5 mg/m3 |
| Stability: | Stable. Flammable - fine powder may cause fire or explosion in air. Incompatible with ozone, sodium tetrahydroborate, sulphur, arsenic. |
| InChIKey | KDLHZDBZIXYQEI-UHFFFAOYSA-N |
| CAS DataBase Reference | 7440-05-3(CAS DataBase Reference) |
| NIST Chemistry Reference | Palladium(7440-05-3) |
| EPA Substance Registry System | Palladium (7440-05-3) |
Safety Information
| Hazard Codes | T,F,Xi |
| Risk Statements | 61-33-37/38-40-41-36/37/38-11 |
| Safety Statements | 53-26-36/37/39-24/25-36-22 |
| RIDADR | UN 3089 4.1/PG 2 |
| WGK Germany | - |
| RTECS | RT3480500 |
| Autoignition Temperature | >1120 °F |
| TSCA | Yes |
| HazardClass | 4.1 |
| PackingGroup | III |
| HS Code | 28439000 |
| Hazardous Substances Data | 7440-05-3(Hazardous Substances Data) |
| Toxicity | LD50 oral (rat) 200 mg/kg (palladium chloride) LC50 intratracheal (rat) 6 mg/kg (palladium chloride) |
Product Application of Palladium CAS#7440-05-3
writing{variant="document" id="62941"} Palladium is a soft, silvery-white metal obtained from copper and nickel ores. Palladium chlorides were used in printing in the early twentieth century and are also employed alongside platinum in printing applications.
Palladium is a transition metal widely utilized in catalytic reactions, including hydrogenation processes and Lindlar catalyst applications. One of its major uses is catalyzing the hydrogenation, dehydrogenation and cracking of petroleum. These reactions play important roles in organic synthesis and petroleum refining.
Palladium and platinum are used in automotive catalytic converters to reduce emissions of unsaturated hydrocarbon gases. Palladium is also applied in manufacturing surgical instruments, electrical contacts, clock springs, premium spark plugs and specialized wires, as well as in jewelry as a component of white gold.
Palladium-gold alloys are extensively used in dentistry and medicine. They can be incorporated into replacements for damaged bones and joints and used as frameworks for porcelain-covered bridges. Palladium alloys also serve decorative and jewelry purposes as alternatives to gold. Applications include gemstones, watch cases and brooches. Palladium can absorb substantial quantities of hydrogen, making it valuable as a catalyst in chemical reactions and in catalytic converters for internal combustion engines. Its ability to absorb carbon monoxide also makes it useful in the production of carbon monoxide monitoring devices.
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