naphthol definition of naphthol in the Free Online Encyclopedia.

naphthol (năf`thôl), C₁₀H₇OH, either of two crystalline monohydric alcohols. The naphthols are position isomers isomer , in chemistry, one of two or more compounds having the same molecular formula but different structures (arrangements of atoms in the molecule). Isomerism is the occurrence of such compounds. Isomerism was first recognized by J. J. Berzelius in 1827.
..... Click the link for more information. , differing in the location of the hydroxyl group hydroxyl group , in chemistry, functional group that consists of an oxygen atom joined by a single bond to a hydrogen atom. An alcohol is formed when a hydroxyl group is joined by a single bond to an alkyl group or aryl group.
..... Click the link for more information. , -OH, on the carbon skeleton of naphthalene naphthalene , colorless, crystalline, solid aromatic hydrocarbon with a pungent odor. It melts at 80°C;, boils at 218°C;, and sublimes upon heating. It is insoluble in water, somewhat soluble in ethanol, soluble in benzene, and very soluble in ether,
..... Click the link for more information. ; α-naphthol is 1-hydroxynaphthalene and β-naphthol is 2-hydroxynaphthalene: The naphthols have a number of similar properties. They melt at 95°C; and 122°C; and boil at 279°C; and 285°C;, respectively; both are soluble in alcohol and ether and slightly soluble in hot water. One way in which they differ is the form of their crystals—α-naphthol crystallizes in prisms and β-naphthol in plates. The naphthols are prepared by reacting naphthalene with sulfuric acid and hydrolyzing the resultant sulfate ester by heating it with sodium hydroxide solution. Both naphthols exhibit antiseptic properties. They are used in the synthesis of certain azo dyes and antioxidants antioxidant, substance that prevents or slows the breakdown of another substance by oxygen. Synthetic and natural antioxidants are used to slow the deterioration of gasoline and rubber, and such antioxidants as vitamin C (ascorbic acid), butylated hydroxytoluene
..... Click the link for more information. for rubbers. Naphthol solutions are used in chemical analysis to detect the ferric ion; dissolved ferric ion turns an α-naphthol solution violet and turns a β-naphthol solution green.

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No references found	The report concluded that all the samples such as excavated waste- lime sludge, naphthol tar, reactor residue, semi- processed pesticide and sevin tar were found to be having very low mammalian toxicity," said Bhopal gas tragedy relief and rehabilitation minister Babulal Gaur. No public tour of killer Bhopal gas plant by Mail Today (New Delhi, India) The important acid water-soluble dye in the Nitroso group is often called Naphthol Green B. Information About Acid Dyes and Their Colors by Lynette Tyson / Hobbies community of Tokyo, said it found instant noodles laced with paradichlorobenzene and naphthol, also used as bug repellent. Japan's Nissin recalls 500,000 noodles over insecticide fears by AFP / AFP Asian Edition	Naphish Naphtali naphtha naphtha gas naphthacene naphthalan Naphthalan Naphtha, Refined Naphthalan Ointment Naphthalene naphthalene-1,5-disulfonic acid naphthaleneacetamide naphthaleneacetic acid Naphthalenesulfonic Acids naphthalic acid naphthalin naphthenate Naphthenate Soap naphthene naphthene base Naphthenes naphthenic acid Naphthenic Acids naphthenic crude naphthine Naphthionic Acid naphthol Naphthols naphthoresorcinol naphthylamine Naphthylamines Naphthysine Napier Napier diagram Napier's analogies Napier's rules Napier, John Napier, Robert Cornelis, 1st Baron Napier of Magdala Napier, Sir Charles James Napier, Sir William Francis Patrick Napier, William Francis Patrick Napierian logarithm napiform napkin pattern Naples Naples yellow Naples, Bay Naples, Gulf of Naples, Kingdom Naples, Kingdom of Naples, University of NAPLPS	Naphthalic Naphthalic naphthalic acid Naphthalidine naphthalin naphthalin naphthalin naphthaline naphthaline naphthaline Naphthalize naphthalophos Naphthazarin Naphthenate Naphthenate Soap naphthene naphthene naphthene base naphthenes naphthenes naphthenic naphthenic Naphthenic acid Naphthenic Acids naphthenic crude Naphthide naphthine naphthionic acid naphthlindandione Naphthoic naphthol Naphthol blue naphthol poisoning naphthol yellow S Naphthols Naphthols Naphthols naphthoquinone naphthoquinone naphthoquinone Naphthoquinones Naphthoquinones Naphthoquinones naphthoresorcinol naphthous naphthous naphthous Naphthyl Naphthylacetic Acid Naphthylamine Naphthylamine Naphthylamines Naphthylamines Naphthysine naphtol naphtol naphtol NAPHWI NAPI NAPIA NAPIAP

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The report concluded that all the samples such as excavated waste- lime sludge, naphthol tar, reactor residue, semi- processed pesticide and sevin tar were found to be having very low mammalian toxicity," said Bhopal gas tragedy relief and rehabilitation minister Babulal Gaur.

No public tour of killer Bhopal gas plant by Mail Today (New Delhi, India)

The important acid water-soluble dye in the Nitroso group is often called Naphthol Green B.

Information About Acid Dyes and Their Colors by Lynette Tyson / Hobbies community

of Tokyo, said it found instant noodles laced with paradichlorobenzene and naphthol, also used as bug repellent.

Japan's Nissin recalls 500,000 noodles over insecticide fears by AFP / AFP Asian Edition

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naphthol