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Sodium thiosulfate pentahydrate is a water soluble salt and reducing agent that reacts with oxidizing agents. It is used as an analytical reagent in laboratories. Sodium thiosulfate pentahydrate is used to dechlorinate tap water, for removing free bromine from solutions and to check the pH of bleach solutions with liquid indicators. Sodium thiosulfate pentahydrate is used in bleaching agents, laboratory chemicals, water treatment products, dechlorination of water for aquariums, ponds etc.

2-Methylimidazole is an organic compound that is structurally related to imidazole with the chemical formula CH3C3H2N2H. It is a white or colorless solid that is highly soluble in polar organic solvents and water.

It is intermediate of metronidazole and fodder growth promoter. It is mainly used as curing accelerator for powder forming and powder coating. It can be used as the curing agent of epoxy resin and dye auxiliaries of fibre textile, as well as additives for the preparation of foam plastics.

Barium sulphate is the inorganic compound with the chemical formula BaSO4. It is a white crystalline solid that is odorless and insoluble in water. It occurs as the mineral barite, which is the main commercial source of barium and materials prepared from it. The white opaque appearance and its high density are exploited in its main applications.

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