Palladium CAS#7440-05-3

CAS Number: 7440-05-3
Chemical Formula: Pd
Synonyms:

PALLADIUM WIRE, 0.5MM (0.02IN) DIA, 99.99+% (METALS BASIS)
PALLADIUM 1% ON ALUMINA
PALLADIUM SILVER ALLOY POWDER -2.5 MICRON SPHERICAL

Appearance: Black Powder

MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)

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Product Details

Palladium CAS#7440-05-3

Palladium was discovered in 1803 by W.H. Wollaston during refining and purification of- platinum metal. This new metal was found in the aqua regia extract of native platinum and was detected in solution after platinum was precipitated. It was removed as ammonium chloroplatinate. Treating this solution with mercurous cyanide precipitated a yellow palladium complex salt. The precipitate was washed and ignited to form palladium metal. Wollaston named the element palladium after the newly discovered asteroid Pallas.
Palladium in nature is always associated with other platinum group metals. Its abundance in earth's crust is estimated at 0.015 mg/kg, about three times more abundant than platinum. Palladium is used mostly in alloys and the majority of its alloys are used for electronics and telecommunications. They are contacts in electrical relays and automatic switching gear. Palladium-gold alloys are applied widely in dentistry and medicine. They are in devices for replacement of damaged bones and joints and as support in porcelain-overlay bridgework. Palladium alloys are used in decoration and jewelry as a substitute for gold. They are used in gems, watch cases and brooches.
One of the most important applications of palladium is to catalyze hydrogenation, dehydrogenation, and petroleum cracking. Such reactions are widely employed in organic syntheses and petroleum refining. Palladium and platinum are installed in catalytic converters in automobiles to cut down the emission of unsaturated hydrocarbon gasses.

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.
Cosmetics Ingredients Functions	COLORANT NOT REPORTED
InChI	1S/Pd
InChIKey	KDLHZDBZIXYQEI-UHFFFAOYSA-N
SMILES	[Pd]
Shear Modulus	42.0 GPa, Calculated
Poissons Ratio	0.39
Modulus of Elasticity	117 GPa
Hardness, Vickers	37, Annealed 105, Cold Drawn
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	nwg
RTECS	RT3480500
Autoignition Temperature	>1120 °F
TSCA	TSCA listed
HazardClass	4.1
PackingGroup	III
HS Code	28439000
Storage Class	13 - Non Combustible Solids
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)