Potassium ethyl xanthate Potassium ethyl xanthate Potassium ethyl xanthate (KEX) is an organosulfur compound with the chemical formula CHCHOCSK. It is a pale yellow powder that is used in the mining industry for the separation of ores. Unlike the related sodium ethyl xanthate, the potassium salt exists as an anhydrous salt. Xanthate salts are prepared by the action of alkoxides on carbon disulfide. The alkoxide is often generated in situ from potassium hydroxide: Potassium ethyl xanthate is a pale yellow powder that is stable at high pH but rapidly hydrolyses at pH <9 at 25 °C. Unlike the sodium derivative, potassium xanthate crystallizes
Ethyl caffeate Ethyl caffeate Ethyl caffeate is an ester of an hydroxycinnamic acid, a naturally occurring organic compound. It can be found in "Bidens pilosa", in "Polygonum amplexicaule var. sinense". It is also found in Huáng bǎi, one of the fifty fundamental herbs of traditional Chinese medicine, also known also as "Cortex Phellodendri", the bark of one of two species of Phellodendron tree: "Phellodendron amurense" or "Phellodendron chinense". It is also found in wines such as Verdicchio, a white wine from Marche, Italy. Ethyl caffeate suppresses NF-kappaB activation and its downstream inflammatory mediators, iNOS, COX-2 and PGE2 "in vitro" or in mouse