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Haematoxylin — IUPAC name 7,11b dihydroindeno[2,1 c]chromene 3,4,6a,9,10(6H) pentol … Wikipedia
soap and detergent — ▪ chemical compound Introduction substances that, when dissolved in water, possess the ability to remove dirt (detergent) from surfaces such as the human skin, textiles, and other solids. The seemingly simple process of cleaning a soiled… … Universalium
Case hardening — or surface hardening is the process of hardening the surface of a metal, often a low carbon steel, by infusing elements into the material s surface, forming a thin layer of a harder alloy. Case hardening is usually done after the part in question … Wikipedia

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