Cetrimonium cation acts as an antiseptic agent against bacteria and fungi. 

Cetyltrimethylammonium bromide is a quaternary ammonium surfactant. It is a popular cationic detergent. So, the correct answer is option B

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nitrobenzene produced in the United States is used to manufacture a chemical called aniline.  Nitrobenzene is also used to produce lubricating oils such as those used in motors and machinery. 

Nitrobenzene is also used to mask unpleasant odors in shoe and floor polishes, leather dressings, paint solvents, and other materials. Redistilled, as oil of mirbane, nitrobenzene had been used as an inexpensive perfume for soaps. It has been replaced by less toxic chemicals for this purpose.

Niobium pentoxide is used mainly in the production of niobium metal, but specialized applications exist for lithium niobate and as a component of optical glass.  Thin films of Nb2O5 form the dielectric layers in solid electrolyte capacitors.

Molten niobium pentoxide has lower mean coordination numbers than the crystalline forms, with a structure comprising mostly NbO5 and NbO6 polyhedra

 n-Hexane is a chemical made from crude oil. Pure n-Hexane is a colorless liquid with a slightly disagreeable odor. It is highly flammable, and its vapors can be explosive. Pure n-Hexane is used in laboratories.

Hexane is an unbranched alkane containing six carbon atoms. It has a role as a non-polar solvent and a neurotoxin. It is an alkane and a volatile organic compound.

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Valeric acid is used as an intermediate in the manufacture of flavors and perfumes, ester type lubricants, plasticizers and vinyl stabilizers. It is a food additive used as a synthetic flavoring substance and adjuvant.

Store in cool place. Keep container tightly closed in a dry and well-ventilated place. Keep away from strong oxidizing agents.

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oxalic acid solution is heated in adsorption tanks, adds barium carbonate and polyacrylamide precipitates, the coacervation reaction process, 

it is characterized in that be with adding barium carbonate and polyacrylamide precipitate, the coacervation reacted 

Oxalic acid acts as a reducing agent for metal oxides to remove tarnish as well as rust or ink stains. It is used commercially as a laundry rinse, wood-bleaching agent, and calcium remover. 

Heavy Liquid Paraffin having usage in wide range of industries like Paint Stripper, Rubber Process Oils, In Plastic Industry as plasticizer for PS, PVC, VA, ABS & other plastic compound manufacturing and processing. The second important use of heavy liquid paraffin is in rubber parts and automotive floor mats.

Perchloric acid is a mineral acid with the formula HClO4. Usually found as an aqueous solution, this colorless compound is a stronger acid than sulfuric acid, nitric acid and hydrochloric acid. 

 Perchloric acid is useful for preparing perchlorate salts, especially ammonium perchlorate, an important rocket fuel component. Perchloric acid is dangerously corrosive and readily forms potentially explosive mixtures.

L-ornithine-L-aspartate is most commonly used for reduced brain function in people with advanced liver disease (hepatic encephalopathy). It is also used for athletic performance, cirrhosis, and other conditions, but there is no good scientific evidence to support these uses.

Tris is highly soluble in water and is useful in the pH range 7.0-9.0. It is used in the preparation of Laemmli buffer, one of the most common SDS-PAGE buffers. In addition, Tris can also be used for many custom running and loading buffers, most often with glycine and SDS.