2020-12-12. paraffins: Plural form of paraffin. Paraffin sections are deparaffinized in xylene for 2 × 20 min and rehydrated by incubation of slides in 96% ethanol (twice), 70% ethanol, and 50% ethanol for 2 min each. Also called: paraffin oil or (esp US and Canadian) kerosene a liquid mixture consisting mainly of alkane hydrocarbons with boiling points in the range 150°–300°C, used as an aircraft fuel, in domestic heaters, and as a solvent 2. another name for alkane 3. paraffin wax Paraffin refers to many chemicals that are white or colorless soft solids and combustible liquid that consists of saturated hydrocarbons, mainly alkane series, obtained from a petroleum refinery. Learn more. Its varieties are as follows: Paraffin wax – solid form used as a lubricant and for other applications Olefins are alkenes, and paraffins are alkanes. So with the long list of hydrocarbons -- gaseous, liquid, and solid -- called paraffins, that are obtained from petroleum and that are all composed of hydrogen and carbon, but with a different number of atoms of each, like a different number of a's or b's or c's in a word.. Crude oil is a finite resource. Paraffin definition, a white or colorless, tasteless, odorless, water-insoluble, solid substance not easily acted upon by reagents, consisting of a mixture of hydrocarbons chiefly of the alkane series, obtained from crude petroleum: used in candles, for forming preservative coatings … It is solid at room temperature and begins to melt above approximately 37 °C (99 °F), and its boiling point is above 370 °C (698 °F). A paraffin inhibitor is a chemical injected into an oil wellbore to prevent or minimize paraffin deposition. The solid forms of paraffin, called paraffin wax, are from the heaviest molecules from C20H42 to C40H82. Manuel announced in February that paraffin, which is widely used by poor people for heating and lighting, would be zero-rated for VAT purposes, thereby cutting the fuel's price by about 40 cents a litre. Paraffin. Congested or oily skin types may not benefit from using products with paraffin. the not so good: It is not suitable for all skin types. Paraffin wax is obtained from petroleum by dewaxing light lubricating oil stocks. the good: Helps to form a protective barrier on the skin, retaining moisture and supporting the healthy functioning of the skin’s natural barrier. Paraffin wax is often used to help soften the skin of the hands, cuticles, and feet because it’s colorless, tasteless, and odorless. Blocks of paraffin wax. Corrections? Let us know if you have suggestions to improve this article (requires login). Paraffin: (1) An old term for a saturated acyclic alkane (not a cycloalkane). What does paraffin wax mean? To make the fire wicks, lower a length of cotton string into an old saucepan in which a pound of paraffin has been heated to its liquid state. The simplest paraffin molecule is that of methane, CH4, a gas at room temperature. Cracking of decane. Experts. (ˌpærəˈfɪnɪk) adjective. 3 Chemical and Physical Properties Expand this section. The name is derived from Latin parum ("barely") + affinis, meaning "lacking affinity" or "lacking reactivity" indicating paraffin's unreactive nature. All skin types except those that have an identified allergy to it. Devices used to perform … Paraffin waxes are mixtures of saturated n- and iso-alkanes, naphthenes and aromatic compounds which are substituted by alkyl and naphthene. ; Waxes are synthesized by many animals and plants. See synonyms for paraffin test noun A forensic test to indicate whether a person has recently fired a gun, in which the person's hand is coated in hot paraffin wax which cools and sets and is peeled off and tested for the presence of residue from the gun. In chemistry, a product is a substance that is formed as the result of a chemical reaction.. Paraffin definition: Paraffin is a strong-smelling liquid which is used as a fuel in heaters, lamps , and... | Meaning, pronunciation, translations and examples paraffin definition: 1. a clear liquid with a strong smell that is made from coal or petroleum, and used as a fuel…. In a reaction, starting materials called reactants interact with each other. Meaning of paraffin wax. Immunostaining uses antibodies to detect an antigen in cells or tissue. What does paraffin mean? 4. decrease in oxidation number In chemistry, paraffin is the common name for the alkane hydrocarbons with the general formula CnH2n+2. (Elements & Compounds) another name for alkane Robert J. Ouellette, J. David Rawn, in Principles of Organic Chemistry, 2015. 3.7 Physical Properties of Alkanes. Paraffin wax is a petroleum derivable soft solid (crude oil) composed of a mixture of hydrocarbon molecules containing between twenty and forty atoms of carbon. It is insoluble in water, but soluble in ether, benzene, and certain esters. Updates? It melts between 47°C; and 65°C; and is insoluble in water but soluble in ether, benzene, and cer A member of the alkane series. The simplest paraffin molecule is that of methane, CH4, a gas at room temperature. Meaning and Definition of paraffin. 0. The simplest paraffin molecule is that of methane, CH 4, a gas at room temperature. Paraffin wax refers to the solids with n=20–40. And for normal beauty uses, inhalation risk is minimal, meaning there’s no regulation limiting its inclusion in normal beauty and skincare products. paraffin inhibitors—high-molecular-weight polymers that interact with paraffins in the crude to modify (inhibit) wax crystal formation, shape, size, and adhesion characteristics pour-point depressants—polymers with n -alkyl chains that similarly impede wax crystal formation, leading to lower fluid viscosity, pour point, and yield stress There is a greater demand for smaller hydrocarbons than larger ones. Ear wax is a mixture of phospholipids and esters of cholesterol. Contents. After passing through a high energy transition state (achieving the activation energy for a reaction), the chemical bonds between the reactants are broken and rearranged to yield one or more products. Paraffin hydrocarbon, also called alkane, any of the saturated hydrocarbons having the general formula C n H 2n+2, C being a carbon atom, H a hydrogen atom, and n an integer. What is paraffin? Candlewick fire starters The well started operating on June 24, 2011, with a flush production rate based on oil in the casing that had been used to treat the paraffin problem. This article was most recently revised and updated by, https://www.britannica.com/science/paraffin-hydrocarbon. paraffin - a series of non-aromatic saturated hydrocarbons with the general formula CnH(2n+2) alkane , alkane series , methane series , paraffin series aliphatic compound - organic compound that is an alkane or alkene or alkyne or their derivative Paraffin wax, colourless or white, somewhat translucent, hard wax consisting of a mixture of solid straight-chain hydrocarbons ranging in melting point from about 48° to 66° C (120° to 150° F). Browse and search thousands of Chemistry Abbreviations and acronyms in our comprehensive reference resource. What does paraffine mean? Omissions? The hydrocarbons are immiscible with water. Branched-chain paraffins have a much higher octane number rating than straight-chain paraffins and, therefore, are the more desirable constituents of gasoline. Ethyleneis an alkene. The simplest paraffin molecule is that of methane, CH 4, a gas at room temperature.Heavier members of the series, such as that of octane, C 8 H 18, and mineral oil appear as liquids at room temperature. Organic Chemistry: Preloading paraffin containers with air- and moisture-sensitive reagents frees chemists from the glove box The shared electron pair in each of these single bonds occupies space directly between the two atoms; the…, …charged hydride ion from a paraffin compound or the addition of a positively charged proton (H. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. It is distinct from keroseneand other petroleum pr… what is meaning of reduction in chemistry? Common applications for paraffin wax include lubrication, electrical insulation, and candles; dyed paraffin wax can be made into crayons. ; The best known animal wax is beeswax, but other insects secrete waxes as well. Neither of these moleculesare paraffins. Paraffin inhibitor should be injected into the well before the crude oil … ; Unlike most natural waxes, which are esters, synthetic waxes consist of long-chain hydrocarbons lacking functional groups. paraffin meaning, definition, what is paraffin: a kind of oil used for heating and in la...: Learn more. paraffinic in American English. Now mostly out of use. Learn more about this molecule from CAS, the most authoritative and comprehensive source for chemical information. Through the dewaxing process that crude oils undergo, paraffin wax is obtained and is then processed further for use in products. The name is derived from Latin parum + affinis, meaning "lacking affinity" or "lacking reactivity" indicating paraffin's unreactive nature. In chemistry, paraffin is a term that can be used synonymously with "alkane, indicating hydrocarbons with the general formula CnH2n+2. To help listeners stay abreast of changes, new developments and trends in their industry, IHS Markit experts and analysts have contributed to podcasts on … ‘The four-cylinder engine could develop 30 h.p. using paraffin as fuel, no doubt more on petrol, then not as easily available.’ ‘As renewable sources of fuel, such as wood become scarce it is important for any society to make the transition to mass-produced fuels such as coal or paraffin, and then later shift to electricity or gas.’ Dates: Modify . Paraffins, also known as alkanes, are saturated compounds that have the general formula C n H 2n+2, where n is the number of carbon atoms. Illustrated Glossary of Organic Chemistry. In chemistry, paraffin is the common name for the alkane hydrocarbons with the general formula C n H 2n+2. 2. gaining hydrogen. reduction is. 1. ANC Daily News Briefing. This page was last changed on 20 October 2014, at 21:25. Paraffin wax, used in some candles, is not based upon the ester functional group, but is a mixture of high molecular weight alkanes. Cracking is used to convert long alkanes into shorter, more useful hydrocarbons. Waxes Structure Defined Below. Paraffin, or paraffin hydrocarbon, is also the technical name for an alkane in general, but in most cases it refers specifically to a linear, or normal alkane — whereas branched, or isoalkanes are also called isoparaffins. (2) A waxcomposed mostly high molecular weighthydrocarbons, having typically twenty to forty carbon atoms per molecule. 1. losing oxygen . The name is derived from the Latin parum (= barely) + affinis with the meaning here of "lacking affinity", or "lacking reactivity". Paraffin wax is obtained from petroleum by dewaxing light lubricating oil stocks. (noun) The term 'olefins', also known as alkenes, are a large number of compounds that contain carbon and hydrogen and have at least one double bond in their structure. The solid forms of paraffin, called paraffin wax, are from the heaviest molecules from C 20 H 42 to C 40 H 82.Paraffin wax was identified by Carl Reichenbach in 1830. From Simple English Wikipedia, the free encyclopedia, Wikipedia:How to write Simple English pages, https://simple.wikipedia.org/w/index.php?title=Paraffin&oldid=4919347, Pages needing to be simplified from September 2011, Creative Commons Attribution/Share-Alike License. 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