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Nitrous oxide chemical properties

The first use of supercritical fluid extraction (SFE) as an extraction technique was reported by Zosel [379]. Since then there have been many reports on the use of SFE to extract PCBs, phenols, PAHs, and other organic compounds from particulate matter, soils and sediments [362, 363, 380-389]. The attraction of SFE as an extraction technique is directly related to the unique properties of the supercritical fluid [390]. Supercritical fluids, which have been used, have low viscosities, high diffusion coefficients, and low flammabilities, which are all clearly superior to the organic solvents normally used. Carbon dioxide (C02, [362,363]) is the most common supercritical fluid used for SFE, since it is inexpensive and has a low critical temperature (31.3 °C) and pressure (72.2 bar). Other less commonly used fluids include nitrous oxide (N20), ammonia, fluoro-form, methane, pentane, methanol, ethanol, sulfur hexafluoride (SF6), and dichlorofluoromethane [362, 363, 391]. Most of these fluids are clearly less attractive as solvents in terms of toxicity or as environmentally benign chemicals. Commercial SFE systems are available, but some workers have also made inexpensive modular systems [390]. [Pg.56]

Nitramine has explosive properties but it is not of any practical value for many reasons, primarily because of its high reactivity which impairs its chemical stability. It decomposes at a temperature as low as its melting point. At room temperature it decomposes slowly, to form nitrous oxide and water. On heating to 60-65°C decomposition occurs in an aqueous solution. It decomposes explosively on contact with concentrated sulphuric acid. ... [Pg.16]

With the development of chemistry in the early 1800s came the understanding that natural products owe their medicinal properties to certain substances they contain. In 1806, for example, morphine was isolated from opium, and in 1820 quinine, a drug useful in fighting malaria, was isolated from the bark of the cinchona tree. Soon, compounds produced in the laboratory were also found to have medicinal properties. In the 1840s, for example, anesthetic activity was found in the synthetic chemicals chloroform, nitrous oxide, and ethyl ether, making painless surgery and dentistry possible. [Pg.479]

The chemical properties of nitrons oxide.—Nitrous oxide was analyzed by... [Pg.393]

Which of these is a chemical property of nitrous oxide gas, rather than a physical property ... [Pg.56]

Today we have sophisticated lab equipment to help us analyze the products of reactions. In the past, when such equipment was not available, chemists sometimes jeopardized their safety and health to determine the products of the reactions they studied. Sir Humphry Davy (1778-1829), a contributor to many areas of chemistry, thought nothing of inhaling the gaseous products of the chemical reactions that he carried out. He tried to breathe pure C02, then known as fixed air. He nearly suffocated himself by breathing hydrogen. In 1800, Davy inhaled dinitrogen monoxide, N20, otherwise known as nitrous oxide, and discovered its anaesthetic properties. What is nitrous oxide used for today ... [Pg.121]

When it comes to physicochemical (biological) properties the common structural formulae obscure rather than explain the problem. One of the most convincing examples may be the anaesthetic activity of chemicals. Among general anaesthetics one can identify such diverse chemical families like hydrocarbons, alcohols, ethers, barbiturates, nitrous oxide, steroids, etc. Each one must have anaesthetic activity encoded in its structure but how is it discovered using conventional chemical symbolic The planar or three-dimensional chemical notation can be an obstacle to making a breakthrough in chemistry. [Pg.520]

What chemical properties of a nitrous oxide molecule allow a researcher to consider this as both a global warming and an ozone-depleting compound ... [Pg.46]

The first hint that a physical property of a drug could be related to biological activity appeared almost 100 years ago when scientists recognized that chloroform (CHCI3), diethyl ether, cyclopropane, and nitrous oxide (N2O) were all useful general anesthetics. Clearly, the chemical stmctures of these diverse compounds could not account for their similar pharmacological effects. Instead, some physical property must explain the similarity of their biological activities. [Pg.1221]

CHEMICAL PROPERTIES reacts vigorously with oxidizing materials polymerization reaction on contact with strong acid, strong base, weak acid conditions (e.g., nitrous fumes, sulfur dioxide, carbon dioxide) may form shock sensitive peroxides or acids FP (-26°C, -15°F) LFL/UFL(2.8%, 31%) AT (235°C, 455°F) HC (-12,500 Btu/lb, -6,950 cal/g, -290 x 105J/kg). [Pg.391]

Many common gases and the vapors of organic solvents are known to produce euphoria, stimulant action, or mood alteration. Such substances differ in their chemical properties, structures, and bondings, as well as in their mode of actions. These include simple inorganic gases, such as nitrous oxide or... [Pg.63]

Common names are arbitrary names that are not based on the chemical composition of compounds. Before chemistry was systematized, a substance was given a name that generally associated it with one of its outstanding physical or chemical properties. For example, quicksilver is a common name for mercury, and nitrous oxide (N2O), used as an anesthetic in dentistry, has been called laughing gas because it induces laughter when inhaled. Water and ammonia are also common names because neither provides any information about the chemical composition of the compounds. If every substance were assigned a common name, the amount of memorization required to learn over 12 million names would be astronomical. [Pg.99]

Nitrous Oxide — (i) Chemical Designations — Synonyms Dinitrogen monoxide Chemical Formula NjO (ii) Observable Characteristics — Physical State (as shipped) Liquefied compressed gas Color Colorless Odor None slightly sweetish (iii) Physical and Chemical Properties — Physical State at 15 "C and 1... [Pg.617]


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See also in sourсe #XX -- [ Pg.355 ]




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