Chemical Process

Formalin has other name alias formaldehyde, have chemical formula of HCHO. Formaldehyde is the simplest member of the class of organic compounds known as Aldehyde. At room temperature formaldehyde is an extremely reactive colorless gas with a suffocating odor. It is commonly solid as an aqueous solution called as formalin or in solid polymeric forms called as paraformaldehyde and trioxane. Formaldehyde often used as preservative agent, people often use on food that actually have poison properties and carcinogenic. Formalin is used in manufacture of dyes, in the production of synthetic resins, and as a preservative agent for biological specimens. In India formalin many use to sterilize media on cultivation mushroom. Before they spread the spawn into the media they sterilize the cultivation media using small amount of formalin that is diluted into the water. Media then dipped on this solution and then let it dry before spread the spawn. In Indonesia to buy formalin from shop is diffic

Nitroglycerin is a pale yellow oil, highly unstable and toxic, first made in 1846 by the Italian chemist Ascario Sobrero. Alfred Nobel's is the first scientist who attempt in 1863 to use as explosive power were unsuccessful because the extremely unstable nature of substance preclude its safe transport, storage, and employment. In 1864 then Nobel produced solid preparations by mixing nitroglycerin with porous substances such as kieselguhr, thus allowing the explosive to be employed as safe, stable, blasting agent, namely dynamite. In medicine, nitroglycerin is used as a vasodilator to reduce arterial tension, especially for the treatment of heart diseases such as angina pectoral. The basic pharmacological action of nitroglycerin is the nonspecific relaxation of all smooth muscle. A throbbing headache, experienced by dynamite factory worker, is the most characteristic symptom of nitroglycerin toxicity. After sometime, immunity to the poison develops; immunity is rapidity lost, how

Sodium sulfide is an organic chemical that has attained an important position in the organic industry. It is consumed as a reducing agent in the manufacture of amino compounds, and it enters into the preparation of many dyes. It is also employed extensively in the leather industry as a depilatory. Sodium polysulfide is one of the important are the rayon, metallurgical, photographic, and engraving fields. This product usually is a side product of other industry. This chemical may be obtained as 30% crystals of sodium sulphide or as 62% flakes. Solutions of it may be shipped in steel. One disadvantageous property of sodium sulphide is its deliquence. It crystallizes wit nine molecules of water, Na 2 S.9H 2 O. The oldest method of production is the reduction of sodium sulphate with powdered coal in a reverberatory furnace. Another similar process is the reduction of barite in the same manner, leaching and double decomposition with soda ash. For the reaction involving the reduction of s

An explosive mixture of sulfur, charcoal, and saltpeter, called black powder , was known to the Chinese centuries ago, its use in propelling missile was demonstrated shortly after 1300. the discoveries of nitro-glycerine and nitrocellulose shortly before 1850 and the invention of dynamites and the mercury fulminate blasting cap soon after, were epochal events of the high explosives era. Smokeless powder was first made in 1867. The demand for more powerful and uniform propellants for the space program offered a recent, new challenge. In times of war, increased quantities are required; for example, roughly 3 x 103 kg was manufactured in the United States between January 1840 and V-J day. Industrial and commercial use is very substantial 1.6 x 109 kg/year in 1982. Although a great many compounds and mixtures are explosive, comparatively, few of them are suitable for explosive use because of the critical restrictions on ability, safety, and price. Most explosive compounds are too expensive

Sodium Hydrosulphide Sodium Hydrosulphide (NaHS) finds use in ore flotation (30 percent), dyestuff processing (20 percent), as a leather depilatory (20 percent), the manufacture or rayon and organic chemicals (10 percent) and in the metallurgical industry. These were five merchant producers who operated six plants in 1981. Total demand was about 18,000 t/year. Wow very big amount. Sodium Thiosulfate Sodium Thiosulfate crystallizes in large, transparent, extremely soluble prisms with five molecules of water. It is a mild reducing agent, like sodium sulfite. It is employed as an antichlor following the bleaching of cellulose products and as a source of sulphur dioxide in the bleaching of wool, oil, and ivory. In photography, which accounts for 90 percent of current use, it is used to dissolve unaltered silver halogen compounds from negatives and prints, where it is commonly called “hypo”. It is a preservative against fermentation in dyeing and serves in the preparation of mordants.

Insect have more species (over one million already described) than any other form of animal life and are in many ways the most indestructible form. About 1 percent of the species offer hazard to human and animals. Human and pests fight a continuous battle for food and shelter. Insects alone claim about 10 % of our crops in US, and about 14 percent in worldwide, various misery causing diseases are carried by insect malaria, yellow fever, typhus, and plague to name a few. For us to survive at current population levels, pesticides must be used and new ones constantly developed. When insecticide applied widely, all but a few of the local insects are destroyed, but the remaining ones are those most resistant to the destroying agent. After destroying generation, this selection makes the surviving insects increasingly resistant to the destroying agent. Eventually, complete resistance may occur. This phenomenon is seen with medical product, and all types of pesticides. In an effort to retard

Sodium Sulfite Sodium sulfite is a compound that is very easily oxidized. For this reason, it is employed in many cases where a gentle reducing agent is desired, e.g. to bleach wool and silk, as an antichlor after the bleaching of yarns, textile and paper, as a preservative for foodstuffs, and to prevent raw sugar solution from colouring upon evaporation. It is very widely used in the preparation of photographic developer to prevent from oxidation from hydroquinone and other agents. It has a small application in the field of medicine as an antiseptic and as an antizymotic for internal use. About 60% of the total merchant market is in the paper Industries. While merchant capacity is about 145,000 t/year, the paper mills have twice capacity to captive use. The demand for boiler feed water treatment is about 15%. It is use to remove oxygen from water and thus help to prevent corrosion and scale formation. These were four major production in 1891, one of which provided 50% percent of the