Zinc Sulfide (ZnS) occurs naturally as blend, and is prepared directly from the elements and by precipitation of a zinc salt solution with ammonium sulfide. It is a gray or off white powder that is insoluble in water, but soluble in acid. ZnS has a l..

In ancient Egypt, color was an integral part of the substance and being of everything in life. The color of something was a clue to the substance or heart of the matter. Egyptian blue was a synthetic blue pigment made combining iron and copper oxides..

Dimethyl fumarate is an ester of fumaric acid that is usually commercially available as a crystalline powder or white granules. It is used in consumer products to avoid the growth of mould fungus. Recent communications show Dimethylfumarate is often ..

Propolis, also called bee glue, is a mixture of various amounts of beeswax and resins collected by the honeybee from plants, particularly from flowers and leaf buds. There are only a few propolis-gathering experts in each hive. Bees of foraging age c..