Naphthalene is an aromatic hydrocarbon found in coal tar or crude oil. 

Naphthalene is used in the manufacture of plastics, resins, fuels, and dyes. 

It is also used as a fumigant insecticide that works by turning directly from a solid into a toxic vapor. This process is called sublimation.

Millon's reagent is prepared by dissolving mercuric nitrate in nitric acid, and then adding water to dilute it.

The reagent is used in Millon reaction test wherein few drops of the reagent are added to the 

test solution, and then heated gently to boiling

MILLONS REAGENT A red solution or precipitate that forms in heating is an indication that tyrosine is present (a positive result). 

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3.53. 4a: Methyl Red is a sensitive indicator for titration of weak organic bases and ammonia. Dissolve 1 g of methyl red powder in 500 mL of 60% alcohol. Use 2 drops for 25 mL of liquid in a titration.     Our Methyl Red (MR) Reagent is an indicator solution used to indicate the pH of the broth culture in the methyl red test. The methyl red test is used to detect the ability of an organism to produce and maintain acid end products from glucose fermentation.

Nigrosin is a black colored powder. It is widely used to manufacture ink and shoe polish. It is also employed for dyeing leather, wood and textiles. In addition, alcohol soluble nigrosin dye is used in carbon papers, typewriter and ribbons.

n-Butyl Acetate is a clear, colorless liquid with a fruity odor. 

It is used in photographic film, nail polish removers, lacquers, perfumes, oils, and resins.

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Calconcarboxylic acid is a useful indicator for calcium titrations with EDTA in the presence of magnesium. It is also required for the staining of proteins in gels. Calconcarboxylic acid is also known as Patton-Reeder indicator and is used in the determination of calcium at pH 12.

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Catalyst for: Aqueous Heck coupling and hydroarylation. Reduction reactions. Hydrogenation reactions.Calcium carbonate is a dietary supplement used when the amount of calcium taken in the diet is not enough. Calcium is needed by the body for healthy bones, muscles, nervous system, and heart. Calcium carbonate also is used as an antacid to relieve heartburn, acid indigestion, and upset stomach.

synthesis of Lindlar catalyst for selective hydrogenation of alkynes.

The main use of litmus is to test whether a solution is acidic or basic. Light-blue litmus paper turns red under acidic conditions, and red litmus paper turns blue under basic or alkaline conditions, with the color change occurring over the pH range 4.5–8.3 at 25 °C

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The single-photon timing and sensitivity performance and the imaging ability of asynchronous-readout single-photon avalanche diode (SPAD) array detectors have opened up enormous perspectives in fluorescence (lifetime) laser scanning microscopy (FLSM), such as super-resolution image scanning microscopy and high-information content fluorescence fluctuation 

Maleic acid is an important raw material used in the manufacture of lubricant additives, unsaturated polyester resins, surface coatings, plasticizers, copolymers and agricultural chemicals [1–5].       Malic acid is a chemical found in certain fruits and wines. It is sometimes used as medicine. Malic acid is used most commonly for dry mouth. It is also used for fibromyalgia, fatigue, and skin conditions, but there is no good scientific evidence to support these other uses.