Alum is a class of chemical compounds containing sulphuric acid or selenate alumina, an alkali and water. They are used industrially as dying agents, as well as food preservatives and flame retardants, and to purify water, staunch bleeding and enhance immune response in some vaccines. They are also used as an ingredient in toothpaste and in artist's clays as a firming agent.Know More
The main kinds of alum are potassium (or potash) alum, soda alum, ammonia alum and chrome alum, all of which contain sulphur, and the selenate alums, which contain selenium instead of sulphur. The selenate alums are used as antiseptics because they are strong oxidizing agents.
The sulphur-based alums are the most widely used, especially potassium alum. Potassium alum is used throughout the food industry in baking powder and as a preservative, especially in pickle brine. It is also used in the textile and leather industry for tanning and dying fabric.
Soda alum is also used in the food industry as a constituent of baking powder and as an acidulent.
Ammonia alum is used in the food industry for many of the same purposes as the two above, as well as being used as a flame retardant and in the manufacture of glue. Ammonia and potash alum are both used to filter water. They are also both used as deodorant crystals.
Chrome alum is not as common as the three other sulphur-based alums, but it is used in the leather industry for tanning skins.Learn more about Atoms & Molecules
Chiral compounds have mirror-image molecules, with the same chemical parts in opposite arrangements, unlike achiral molecules, which have mirror-image molecules that are identical. Chiral molecules cannot be rotated to match each other, but they have identical chemical properties in most situations. Chiral molecules are important in areas of biology in which cellular machinery typically uses only one version of the molecules.Full Answer >
More properly stated as 4-chloro-17a-methyl-androst-1,4-diene-3-17b-diol, and not as separate compounds, this chemical is the main ingredient in Halovar. Halovar, a clone of a pro-hormone or steroid precursor called Halodrol, builds muscle in the body when ingested.Full Answer >
The element antimony, with the chemical symbol Sb, was originally called stibium by Pliny, an ancient Roman author who is believed to have produced it by heating one of its compounds, the mineral stibnite. Antimony and its compounds, stibine and stibnite, are extremely toxic.Full Answer >
The octet rule is important in the creation of chemical compounds because it reflects the basis of what causes the atoms of specific elements to react with each other to form new molecules. The rule describes how chemical bonds are formed and why some elements are highly reactive and others are not. As the name implies, the octet rule is associated with the number "8," which represents the number of electrons present in the outermost electron orbit of an atom in its most stable state.Full Answer >