Home Categories Inorganic chemistry Palladium on calcium carbonate
A6854612

Palladium on calcium carbonate , MoistenedWithwater, 5%PDBASIS (Basedondrysubstance), unreduced (not toxic) , 7440-05-3

CAS NO.:7440-05-3

Empirical Formula: Pd

Molecular Weight: 106.42

MDL number: MFCD00011167

EINECS: 231-115-6

Pack Size Price Stock Quantity
5G RMB319.20 In Stock
25G RMB1359.20 In Stock
100G RMB4479.20 In Stock
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Update time: 2022-07-08

PRODUCT 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)

Description and Uses

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.

Demand for palladium is high for its use in electrical equipment in its metal and paste forms, dentalmaterials in its alloy form, as a composite in implantable medical devices and automobile catalysts owing to its strong catalytic activity for hydrogenation, dehydrogenation, oxidation, and hydrogenolysis reactions.

Safety

Symbol(GHS) 
GHS07
Signal word  Warning
Hazard statements  H315-H319
Precautionary statements  P305+P351+P338
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
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)

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