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Palladium

Palladium
Palladium
CAS No.
7440-05-3
Chemical Name:
Palladium
Synonyms
10%Pd;Paladium;AlladiuM;PD007940;PD004700;PD005146;PD000260;PD005116;PD000202;PD007200
CBNumber:
CB5854181
Molecular Formula:
Pd
Formula Weight:
106.42
MOL File:
7440-05-3.mol

Palladium Properties

Melting point:
1554 °C(lit.)
Boiling point:
2970 °C(lit.)
Density 
1.025 g/mL at 25 °C
storage temp. 
Store at RT.
form 
wire
color 
Silver-gray
Water Solubility 
INSOLUBLE
Merck 
14,6989
Stability:
Stable. Flammable - fine powder may cause fire or explosion in air. Incompatible with ozone, sodium tetrahydroborate, sulphur, arsenic.
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
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
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
TSCA  Yes
HazardClass  4.1
PackingGroup  III
Hazardous Substances Data 7440-05-3(Hazardous Substances Data)
Symbol(GHS):
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H228 Flammable solid Flammable solids Category 1
Category 2
Danger
Warning
P210, P240,P241, P280, P370+P378
H252 Self-heating in large quantities; may catch fire Self-heating substances and mixtures Category 2 Warning P235+P410, P280, P407, P413, P420
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H333 May be harmful if inhaled Acute toxicity,inhalation Category 5 P304+P312
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
H360 May damage fertility or the unborn child Reproductive toxicity Category 1A, 1B Danger
H401 Toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 2 P273, P501
H402 Harmful to aquatic life Hazardous to the aquatic environment, acute hazard Category 3
H411 Toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 2
Precautionary statements:
P201 Obtain special instructions before use.
P202 Do not handle until all safety precautions have been read and understood.
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P240 Ground/bond container and receiving equipment.
P241 Use explosion-proof electrical/ventilating/lighting/…/equipment.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P235+P410 Keep cool. Protect from sunlight.
P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P308+P313 IF exposed or concerned: Get medical advice/attention.
P405 Store locked up.
P420 Store away from other materials.

Palladium price More Price(784)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 1.19225 Palladium 99+ powdered for analysis 99+ EMSURE 7440-05-3 1EA $358 2017-11-08 Buy
Sigma-Aldrich 1.19225 Palladium 99+ powdered for analysis 99+ EMSURE 7440-05-3 2EA $1430 2017-11-08 Buy
TCI Chemical P1490 Palladium 5% on Carbon (wetted with ca. 55% Water) 7440-05-3 5g $36 2017-12-01 Buy
TCI Chemical P1490 Palladium 5% on Carbon (wetted with ca. 55% Water) 7440-05-3 25g $112 2017-12-01 Buy
Alfa Aesar 00659 Palladium black, 99.9% (metals basis) 7440-05-3 1g $120 2017-11-08 Buy

Palladium Chemical Properties,Uses,Production

Description

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.

Chemical Properties

It is a silver-white metal (face-centered cubic crystal).  Soluble in aqua regia, hot nitric acid, sulfuric acid, slightly soluble in hydrochloric acid, insoluble in cold water and hot water.

Chemical Properties

Grey Powder

Uses

Palladium is a transition metal element used in catalytic reactions involving processes such as hydrogenation. Lindlar Catalyst

Uses

Preparation

It can be made from the ore with dry process in Industrial production; can also copper, nickel sulfide ore preparation of copper, nickel production process as a by-product as raw materials, made by wet smelting. It can also be obtained from the wet process with the byproduct of copper, nickel production from the copper sulfide ore or nickel sulfide ore.
The wet method is using the residue of extracted nickel and copper as raw materials, adding aqua for extraction, filtration, adding ammonia and hydrochloric acid to react, thus forming the precipitation of ammonium chloropalladate. After refining, filtration, reduction of ammonium chloropalladate with hydrogen 99.95% finished product of palladium can be obtained.

Definition

ChEBI: Chemical element (nickel group element atom) with atomic number 46.

Uses

In form of gold, silver, and copper alloys in dentistry; for alloy bearings, springs, balance wheels of watches; for mirrors in astronomical instruments; as catalyzer in manufacture of sulfuric acid and in other oxidizing processes; in powder form as catalyst in hydrogenation and in ignition of hydrogen or hydrocarbons with oxygen; the spongy form is used in gas analysis for separating hydrogen from mixtures of gases.

Reactions

Among the platinum group metals, palladium is the least noble metal, exhibiting greater reactivity than other metals of the group. The metal forms mostly bivalent compounds, although a small number of tetravalent and a fewer trivalent compounds are known. Palladium exhibits a strong tendency to form complexes, most of which are four-coordinated square planar complexes of the metal in +2 oxidation state. When heated in air or oxygen above 350°C, palladium forms a black oxide, PdO coated over its surface. On further heating to over 790°C, the oxide decomposes back to the metal. Palladium dissolves more oxygen in molten state than in solid form.
Palladium reacts with fluorine and chlorine at 500°C forming its halides, the black PdF3 and the red deliquescent solid PdCl2.
Palladium is attacked by concentrated nitric acid, particularly in the presence of nitrogen oxides. The reaction is slow in dilute nitric acid. Finely divided palladium metal reacts with warm nitric acid forming palladium(II) nitrate, Pd(NO3)2. Hydrochloric acid has no affect on the metal. Reaction with boiling sulfuric acid yields palladium sulfate, PdSO4, and sulfur dioxide.
Palladium readily dissolves in aqua regia forming chloropalladic acid, H2PdCl6. Evaporation of this solution yields palladium(II) chloride, PdCl2.
Palladium absorbs hydrogen over 800 times its own volume over a range of temperature. By doing so, the metal swells, becoming brittle and cracked. Such absorption of hydrogen decreases the electrical conductivity of the metal. Also, such absorption activates molecular hydrogen, dissociating it to atomic hydrogen.

Palladium Preparation Products And Raw materials

Raw materials

Preparation Products


Palladium Suppliers

Global( 253)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Capot Chemical Co.,Ltd.
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Adamas Reagent, Ltd. 400-600-9262
bxy@titansci.com China 14018 59
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0371-86239377 1758257485@qq.com China 960 56
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021-51821727 shenlinxing@macklin.cn China 13251 55
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Meryer (Shanghai) Chemical Technology Co., Ltd. +86-(0)21-61259100(Shanghai) +86-(0)755-86170099(ShenZhen) +86-(0)10-62670440(Beijing)
+86-(0)21-61259102(Shanghai) +86-(0)755-86170066(ShenZhen) +86-(0)10-88580358(Beijing) sh@meryer.com China 40398 62
Energy Chemical 021-58432009 / 400-005-6266
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