Monday, March 26, 2012

Specifications of Ammonium hexachloroiridate(III)

Ammonium hexachloroiridate(III)
CAS 15752-05-3
F.Weight. 459.06
Molecular Formula: Cl6H12IrN3
Synonyms: Ammonium chloroiridite, Triammonium hexachloroiridate, EINECS 239-842-0, CID161145, Iridate(3-), hexachloro-, triammonium
assay 99.99% trace metals basis
form solid
solubility H2O: slightly soluble
Ammonium Chloride, an inorganic compound with the formula NH4Cl, is a white crystalline salt, highly soluble in water. Solutions of ammonium chloride are mildly acidic. Sal ammoniac is a name of the natural, mineralogical form of ammonium chloride. The mineral is especially common on burning coal dumps (formed by condensation of coal-derived gases), but also on some volcanoes and liquorice. It is the product from the reaction of hydrochloric acid and ammonia.
Ammonium chloride is used as a flux in preparing metals to be tin coated, galvanized or soldered. It works as a flux by cleaning the surface of workpieces by reacting with the metal oxides at the surface to form a volatile metal chloride. For this purpose, it is sold in blocks at hardware stores for use in cleaning the tip of a soldering iron and can also be included in solder as flux.
Ammonium chloride is used as an expectorant in cough medicine. Its expectorant action is caused by irritative action on the bronchial mucosa. This causes the production of excess respiratory tract fluid which presumably is easier to cough up. Ammonium salts are an irritant to the gastric mucosa and may induce nausea and vomiting.
Ammonium chloride is used as a systemic acidifying agent in treatment of severe metabolic alkalosis, in oral acid loading test to diagnose distal renal tubular acidosis, to maintain the urine at an acid pH in the treatment of some urinary-tract disorders.
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Thursday, March 22, 2012

Where to get Oxycarbonyruodium chloride?

Ruthenium(III) chloride is the chemical compound with the formula RuCl3. "Ruthenium(III) chloride" more commonly refers to the hydrate RuCl3·xH2O. Both the anhydrous and hydrated species are dark brown or black solids. The hydrate, with a varying proportion of water of crystallization, often approximating to a trihydrate, is a commonly used starting material in ruthenium chemistry.
Properties
The anhydrous forms of Ruthenium(III) chloride are well characterized but rarely used. Crystalline material is usually prepared by heating powdered ruthenium metal to 700 °C under a 4:1 mixture of chlorine and carbon monoxide: the product is carried by the gas stream and crystallises upon cooling. RuCl3 exists is two crystalline modifications. The black α-form adopts the CrCl3-type structure with long Ru-Ru contacts of 346 pm. The dark brown metastable β-form crystallizes in a hexagonal cell; this form consists of infinite chains of face-sharing octahedra with Ru-Ru contacts of 283 pm. The β-form is irreversibly converted to the α-form at 450–600 °C.
RuCl3 vapour decomposes into the elements at high temperatures ; the enthalpy change at 750 °C (1020 K), ΔdissH1020 has been estimated as +240 kJ/mol.
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Specifications of 2-Amino-6-bromopyridine

2-Amino-6-bromopyridine
CAS Number: 19798-81-3
Molecular Weight: 173.01
Molecular Formula: C5H5BrN2
Synonyms 6-Bromo-2-pyridinamine
Physical Appearance: White to tan powder
Melting point 88-91 ºC
Description of 2-Amino-6-bromopyridine
Employed in an efficient one-pot synthesis of 7-azaindoles. Used in the synthesis of anti-HIV agents.
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Wednesday, March 21, 2012

What is Tetrakis(triphenylphosphine)palladium(0)?

Tetrakis(triphenylphosphine)palladium(0)
Synonyms Palladium(0)tetrakis(triphenylphosphine)
Molecular Formula C72H60P4Pd
Molecular Weight 1155.58
CAS Registry Number 14221-01-3
Melting point 103-107 ºC
Water solubility insoluble
Tetrakis(triphenylphosphine)palladium(0) is the chemical compound Pd[P(C6H5)3]4, often abbreviated Pd(PPh3)4, or even PdP4. It is a bright yellow crystalline solid that becomes brown upon decomposition in air.
Palladium is a chemical element with the chemical symbol Pd and an atomic number of 46. It is a rare and lustrous silvery-white metal discovered in 1803 by William Hyde Wollaston. He named it after the asteroid Pallas, which was itself named after the epithet of the Greek goddess Athena, acquired by her when she slew Pallas. Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs). These have similar chemical properties, but palladium has the lowest melting point and is the least dense of them.
Application
Catalyst for Negishi coupling, Suzuki coupling, Stille coupling, and Sonogashira coupling reaction
Catalyst for Buchwald-Hartwig amination reaction
Catalyst for the carbonylation of vinyl iodides
Catalyst for reduction reaction of aryl bromides
Catalyst for carbon-tin bond formation
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Tuesday, March 20, 2012

Uses of Cholesteryl pelargonate (Cholesterol pelargonate)?

Cholesteryl nonanoate, also called cholesteryl pelargonate, 3β-cholest-5-en-3-ol nonaoate or cholest-5-ene-3-β-yl nonanoate, is an ester of cholesterol and nonanoic acid. It is a liquid crystal material forming cholesteric liquid crystals with helical structure. It forms spherulite crystals.
Uses
It is used in some hair colors, make-ups, and some other cosmetic preparations. It is also used in some pleochroic dyes and together with e.g. cholesteryl oleyl carbonate and cholesteryl benzoate in some thermochromic applications.
Cholesteryl pelargonate (Cholesterol pelargonate) can be also used as a component of the liquid crystals used for liquid crystal displays.
Cholesterol is a steroid alcohol that is essentially insoluble in aqueous solutions. Cholesterol can be esterified with a fatty acid to form cholesteryl esters. The latter form discrete lipid droplets in cells, especially in cells of steroidogenic tissues, and in the lipid core of low-density lipoproteins in the blood. Cholesterol is a fatty lipid sparingly insoluble in water but soluble in a number of organic solvents. It is the most common sterol of eukaryotes which a key constituent of cell membranes and works as the precursor of bile acids, cholecalciferol (vitamin D)  and steroid hormones including cortisol, cortisone,  aldosterone and sex hormone progesterone in vertebrates. Cholesterol is used as an emulsifying agent in pharmaceuticals. The most cholesterols are synthesized by the liver and other tissues include the adrenal glands and reproductive organs. Some cholesterol  is absorbed from dietary sources. The largest concentration of cholesterol is in the myelin sheath that surrounds nerves and in the plasma membrane that surrounds all cells in vertebrates (25% of brain lipid is cholesterol).
Cholesterol can be esterified with a fatty acid to form cholesteryl esters which form discrete lipid droplets in cells, especially in cells of steroidogenic tissues, and in the lipid core of low-density lipoproteins in the blood. The collection on the walls of arteries interferes with the flow of blood. The High level of cholesterol in the blood is a major risk factor for coronary heart diseases. Cholesteric materials are liquid crystals of mesomorphic phase in which molecules are parallel to each other within the plane of a layer, but the direction is oriented in loose parallel lines to form a helix through the layers. Cholesteric materials are temperature sensitive and have color changing ability upon temperature
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Monday, March 19, 2012

What is N-Benzyl-4-(benzylamino)picolinamide?

N-Benzyl-4-(benzylamino)picolinamide
Synonyma: N-BENZYL-4-(BENZYLAMINO)PICOLINAMIDE;4-(Benzylamino)-N-benzylpyridine-2-carboxamide;4-(Benzylamino)-N-benzylpyridine-2-carboxamide 98%
Molecular Formula:C20H19N3O
CAS No.: 913836-29-0
Molecular weight:317.38436
Picolinamide, 2-pyridinecarboxylic acid amide, was found to be a strong inhibitor of poly (ADP-ribose) synthetase of nuclei from rat pancreatic islet cells. Another experiment using isolated pancreatic islets of rats showed that picolinamide protects against streptozotocin-induced depression of proinsulin synthesis as well as against streptozotocin-induced reduction of NAD content. The protection by picolinamide against the NAD depression was considered to be due to the blockage of an increased degradation of NAD mediated by a streptozotocin-induced increase in poly (ADP-ribose) synthetase activity.
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What is 4-Fluoro-2-methoxy-N-methylaniline?


4-Fluoro-2-methoxy-N-methylaniline
Molecular Formula:C8H10FNO
CAS No.:941294-13-9
N-methylaniline
is an aniline derivative. It is a toxic organic compound with the chemical formula C6H5NH(CH3). The substance exists as a colorless or slightly yellow viscous liquid, which is insoluble in water and brown when exposed to air. It is used as a latent and coupling solvent and is also used is as an intermediate for dyes, agrochemicals and other organic products manufacturing.
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