Dragendorff's reagent is a color reagent to detect alkaloids in a test sample or as a stain for chromatography plates.DR is a solution of potassium bismuth iodide composing of basic bismuth nitrate (Bi(NO₃)₃), tartaric acid, and potassium iodide (KI), and when contact with alkaloids DR produces an orange or orange red precipitate.

EOSINE SPIRIT SOLUBLE The sodium or potassium salt of eosin, red to rose-colored crystalline powder, is used in biology to stain cells.  Eosin is strongly absorbed by red blood cells

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Diethanolamine is widely used in the preparation of diethanolamides and diethanolamine salts of long-chain fatty acids that are formulated into soaps and surfactants used in liquid laundry and dishwashing detergents, cosmetics, shampoos and hair conditioners.In oil refineries, a DEA in water solution is commonly used 

Diethanolamine is a member of the class of ethanolamines that is ethanolamine having a N-hydroxyethyl substituent. It has a role as a human xenobiotic metabolite. It derives from an ethanolamine.

Dimethylformamide is an organic compound with the formula (CH3)2NC(O)H.

Commonly abbreviated as DMF (although this initialism is sometimes used for dimethylfuran, 

or dimethyl fumarate), this colourless liquid is miscible with water and the majority of organic liquids.

 N,N-Dimethylformamide (DMF) is the commonly employed solvent for chemical reactions DMF is a useful solvent employed for the isolation of chlorophyll from plant tissues.

Citric acid is used as an excipient in pharmaceutical preparations due to its antioxidant properties. It maintains stability of active ingredients and is used as a preservative. It is also used as an acidulant to control pH and acts as an anticoagulant by chelating calcium in blood.

According to the FDA Select Committee on Generally Recognized as Safe (GRAS) food substances, citrate salts, including citric acid, are generally regarded as safe when used in normal quantities

COBALT II NITRATE LR HEXAHYDRATE It is commonly reduced to metallic high purity cobalt. It can be absorbed on to various catalyst supports for use in Fischer–Tropsch catalysis. It is used in the preparation of dyes and inks.

Cobalt nitrate is the inorganic compound with the formula Co(NO3)2. xH2O. It is cobalt(II)'s salt. The most common form is the hexahydrate Co(NO3)2·6H2O, which is a red-brown deliquescent salt that is soluble in water and other polar solvents

 CERTISTAIN dry dye Cresyl violet (acetate) is used for 

the preparation of a staining solution that can be used for the staining of nuclei and Nissl bodies. 

The greatest problem with this method is overstaining or irregularity of staining with Malachite green. It is also valuable in demonstrating the Legionella bacillus in post-mortem lung smears.

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Cobalt Oxide is generally immediately available in most volumes. Ultra high purity and high purity compositions improve both optical quality and usefulness.

Cobalt is also used to make airbags in automobiles; catalysts for the petroleum and chemical industries; cemented carbides (also called hardmetals) and diamond tools; corrosion- and wear-resistant alloys; drying agents for paints, varnishes, and inks; dyes and pigments; ground coats for porcelain enamels; high-speed

Concentrated solutions are red at room temperature but become blue at higher temperatures. Hydrates[edit]. The crystal unit of the solid hexahydrate CoCl

Concentrated solutions are red at room temperature but become blue at higher temperatures. Hydrates. The crystal unit of the solid hexahydrate CoCl

Cobalt sulfates are important intermediates in the extraction of cobalt from its ores. ... Cobalt(II) sulfate is used in storage batteries and electroplating baths, sympathetic inks, and as an additive to soils and animal feeds. For these purposes, the cobalt sulfate is produced by treating cobalt oxide with sulfuric acid.