SINGAPORE: Hydrochloric acid is a colourless and odourless solution of hydrogen chloride and water; with chemical formula HCl. Once co...
SINGAPORE: Sodium hydroxide , also known as caustic soda or lye, is an inorganic compound with the chemical formula NaOH. It is a white...
Monday, 28 April 2014
Beryllium Description: Beryllium is a divalent element which only occurs naturally in combination with other elements in minerals. It is primarily used as a hardening agent in alloys, notably beryllium copper. In structural applications, high flexural rigidity, thermal stability, thermal conductivity and low density make beryllium a quality aerospace material for high-speed aircraft, missiles, space vehicles and communication satellites. Because of its low density and atomic mass, beryllium is relatively transparent to X-rays and other forms of ionizing radiation; therefore, it is the most common window material for X-ray equipment and in particle physics experiments. The high thermal conductivity of beryllium and beryllium oxide have led to their use in heat transport and heat sinking applications. Chemical Properties. Appearance Silvery solid or grey foil Atomic Number 4 Atomic Weight 9.01218 g/mol Block S Boiling Point 2469 °C CAS Number 7440-41-7 Class 8 Crystal Structure Hexagonal Density 1.85 g/cm3 EINECS Number 231-150-7 Electron Configuration 1s2 2s2 Group 2 Ionization Energy 899.5 kJ/mol Main Hazards Beryllium dust causes conjuctival inflammation of the eyes and dermatitis. Melting Point 1287 °C Oxidation State 2,1 PG 2 Period 2 RTECS Number DS1750000 Solubility Insoluble Symbol Be Synonyms Glucinium Beryllium manufacturers/suppliers - http://www.worldofchemicals.com/chemicals/chemical-properties/beryllium.html
Lithium Description: Lithium is a metal that belongs to the alkali metal group of chemical elements. Under standard conditions it is the lightest metal and the least dense solid element. Lithium and its compounds have several industrial applications, including heat-resistant glass and ceramics, high strength-to-weight alloys used in aircraft, lithium batteries and lithium-ion batteries. Lithium niobate is used extensively in telecommunication products such as mobile phones and optical modulators, for such components as resonant crystals. Lithium is also used in the pharmaceutical and fine-chemical industry in the manufacture of organolithium reagents, which are used both as strong bases and as reagents for the formation of carbon-carbon bonds. Organolithium compounds are also used in polymer synthesis as catalysts/initiators in anionic polymerization of unfunctionalized olefins. Lithium compounds continue to be the gold standard for the treatment of bipolar disorder and are helpful for related diagnoses, such as schizoaffective disorder and cyclic major depression. Chemical Properties. Appearance Silver-White Solid Atomic Number 3 Atomic Weight 6.941 g/mol Block s Boiling Point 1342 °C CAS Number 7439-93-2 Class 4.3 Crystal Structure Body-Centered Cubic Density 0.534 g/cm3 EINECS Number 231-102-5 Electron Configuration 1s2 2s1 Group 1 Ionization Energy 520.2 kJ/mol Melting Point 180.54 °C NFPA 704 H-3,F-4,R-2,C-NA Oxidation State +1,-1 PG 1 Period 2 RTECS Number OJ5540000 Symbol Li Lithium manufacturers/suppliers - http://www.worldofchemicals.com/chemicals/chemical-properties/lithium.html#
Saturday, 26 April 2014
Helium Description: Helium is a monatomic gas that heads the noble gas group in the periodic table. Its boiling and melting points are the lowest among the elements and it exists only as a gas except in extreme conditions. It is the second most abundant element in the universe. It is used in cryogenics, particularly the cooling of superconducting magnets, with the main commercial application in MRI scanners. Helium's other industrial uses as a pressurizing and purge gas, and a protective atmosphere for arc welding and processes such as growing crystals to make silicon wafers, account for half of its use. Economically minor uses, such as lifting gas in balloons and airships are popularly known. As with any gas with differing density from air, inhaling a small volume of helium temporarily changes the timbre and quality of the human voice. In scientific research, the behavior of two fluid phases of helium-4, helium I and helium II, is important to researchers studying quantum mechanics and to those looking at the effects that temperatures near absolute zero have on matter. Chemical Properties. Appearance Colorless Gas Atomic Number 2 Atomic Weight 4.0026 g/mol Block s Boiling Point −268.9 °C CAS Number 7440-59-7 Class 2.2 Crystal Structure Hexagonal Close-Packed Density 0.1786 g/l EINECS Number 231-168-5 Electron Configuration 1s2 Group 18 Ionization Energy 2372.3 kJ/mol Melting Point −272.2 °C PG NA Period 1 RTECS Number MH6520000 Symbol He manufacturers/suppliers - http://www.worldofchemicals.com/chemicals/manufacturers/fl/helium.html
Friday, 25 April 2014
|Hydrogen is the lightest and most abundant chemical element.The most common isotope of hydrogen is protium with a single proton and no neutrons. In 1671, Robert Boyle discovered and described the reaction between iron filings and dilute acids, which results in the production of hydrogen gas. In 1766, Henry Cavendish was the first to recognize hydrogen gas as a discrete substance, by identifying the gas from a metal-acid reaction as "phlogiston", meaning "flammable air" and further finding in 1781 that the gas produces water when burned. He is usually given credit for its discovery as an element. In 1783, Antoine Lavoisier gave the element the name hydrogen when he and Laplace reproduced Cavendish's finding that water is produced when hydrogen is burned. Large quantities of hydrogen are needed in the petroleum and chemical industries. The largest application of hydrogen is for the processing of fossil fuels, and in the production of ammonia. It is used as a hydrogenating agent, particularly in increasing the level of saturation of unsaturated fats and oils, and in the production of methanol. It is similarly the source of hydrogen in the manufacture of hydrochloric acid. It is also used as a reducing agent of metallic ores. It is commonly used in power stations, as a coolant in generators, due to its specific heat capacity being considerably higher than any other gas.|
|Atomic Weight||1.00794 g/mol|
|Boiling Point||−252.87 °C|
|Ionization Energy||1312 kJ/mol|
|Melting Point||−259.14 °C|
|Solubility||0.00017 g/100 ml|
For hydrogen manufacturers/suppliers - http://www.worldofchemicals.com/chemicals/manufacturers/fl/hydrogen.html
Monday, 21 April 2014
Hi Folks Good Morning
Rub you eyes its time to win “Samsung Galaxy Tab 3″
I hope all of you are doing good, if not this message will make all of you happy, yes i am not joking as we all know world of chemicals portal is one of the fastest growing online chemistry portal in the world is inviting essay entries as a part of “Earth Day celebration.”
The topic for Essay Competition 2014 is “Reducing harmful chemical footprint, a reality?
The topic is focused on reducing the harmful chemical impact on Earth and making it a better place to live. We have reached to a level where the dependency on synthetic chemicals cannot be completely eliminated. Chemicals do exist in nature, they are the ones useful the mankind, but we have been manufacturing chemicals (synthetic chemicals), most of which are hazardous. This year on Earth Day, let us think of the alternatives which can reduce the dependency on the synthetic chemicals and make our Earth better and safer.
Anyone can participate irrespective of the geographical location, educational qualification etc. The word limit for essay is 600 – 800 words.
Last date of submission is – 27 April 2014
Results announcement – 5 May 2014 on Worldofchemicals website
Submission mode – upload here -
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