Ammonia solution is a liquid mixture of ammonia salts and water and has the chemical formula NH4OH. It is also known as ammonium hydroxide, aqueous ammonia, ammoniacal liquor and ammonia water. As the concentration of dissolved ammonia increases, so the solution decreases in density
Diphenylamine is used for control of superficial scald in stored apples Diphenylamine is the organic compound with the formula (C6H5)2NH.
It is a colourless solid, but samples are often yellow due to oxidized impurities. It is a weak base, with a KB of 10 14. With strong acids, it forms the water soluble salt.
Calcium sulfate, CaSO4, is a naturally occurring calcium salt. It is commonly known in its dihydrate form, CaSO4∙2H2O, a white or colourless powder called gypsum
Thymol blue is used as a pH indicator. It is insoluble in water but soluble in alcohol and dilute alkali solutions. It transit from red to yellow at pH 1.2–2.8 and from yellow to blue at pH 8.0–9.6. It is usually a component of Universal indicator.
Isopropanol (IPA) Extrapure AR, 99.5% is a high-purity solvent widely used in laboratories and industries for cleaning, degreasing, and as a chemical intermediate in various processes.
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