Chemistry

Chlorine Dioxide Definition Chlorine dioxide (ClO2) is a yellow to reddish-yellow manufactured gas. It does not occur naturally in the environment. When added to water,…

Hypochlorite Definition Hypochlorite is a salt or ester of hypochlorous acid, containing the group OCl. It is a strong oxidant. It can combine with a…

Bilirubin Definition Bilirubin is a reddish-yellow pigment that is a constituent of bile and gives it its color. Bilirubin is a porphyrin derived from the…

Sylvite Definition Sylvite is a soluble colourless, white, or coloured mineral consisting of potassium chloride in cubic crystalline form with sodium impurities: it occurs chiefly…

Disintegration test of paracetamol tablet It is recognized generally that the in vitro tablet disintegration test does not necessarily bear a relationship to the in…

Hexafluorosilicic Acid Definition Hexafluorosilicic acid is a substance that yields hydrogen ions in solution and from which hydrogen may be displaced by a metal to…

Galena Definition Galena is a gray, metallic mineral occurring in cube-shaped crystals within veins of igneous rock or in sedimentary rocks. It is the main…

Silver Sulfide Definition Silver sulfide (Ag2S) is a dense black solid that is insoluble in all solvents, but is degraded by strong acids. It is…

Acanthite Definition Acanthite is one of the most important ores of silver with the chemical formula Ag2S. It is a stable and low-temperature form of…

Chalcocite Definition Chalcocite (Cu2S) is a lead-grey or black mineral, found as a copper ore or in veins. It is a source of copper. It…

Uses of Arsenic Arsenic is a well-known poison. Arsenic compounds are sometimes used as rat poisons and insecticides but their use is strictly controlled. Surprisingly, arsenic…

Arsenic is highly toxic in its inorganic form. Contaminated water used for drinking, food preparation and irrigation of food crops poses the greatest threat to…