Pronunciation: [ɹɪətˈanɪk ˈasɪd] (IPA) 
The word "rheotannic acid" is spelled using the International Phonetic Alphabet (IPA) as [ri.əʊ.tæn.ɪk æs.ɪd]. The IPA is a system of phonetic notation that represents the sounds of spoken language. In this case, the word starts with the "r" sound, followed by the "ee" sound, the "oh" sound, the "t" sound, and so on. The word refers to a type of acid that is typically found in flowing water, such as rivers or streams.
Rheotannic acid is a chemical compound that belongs to the class of tannic acids. It is derived from plant sources, particularly from the bark of various tree species such as oak, quebracho, and chestnut. The acid is extracted by macerating the bark in water, followed by precipitation and filtration. It is a yellowish-brown amorphous powder that has a characteristic astringent taste.
The term "rheotannic" refers to the ability of this compound to respond to changes in temperature and pH, allowing it to exhibit different properties. Rheotannic acid is known for its distinct ability to complex with metals, forming stable complexes known as metal chelates. These complexes are highly soluble in water and have a wide range of applications, particularly in the fields of chemistry and industry.
One prominent application of rheotannic acid is its use as a mordant in textile dyeing processes. It enhances the uptake of dyes onto fabrics, resulting in improved color fastness and durability. Additionally, rheotannic acid has been employed in the manufacture of inks, adhesives, and tanning agents for leather production.
Due to its astringent properties, this acid has also been traditionally used in various medicinal and healthcare practices. It has been employed as a hemostatic agent for stopping bleeding, as well as in the treatment of diarrhea and other gastrointestinal disorders.
In summary, rheotannic acid is a natural chemical compound derived from plant sources, known for its metal complexing properties and applications in dyeing, chemical synthesis, and medicinal practices.
A glucoside, C26H26O14, the form of tannin occurring in rhubarb.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
